The present invention provides a cutting apparatus comprising: a supply part for supplying an object to be cut; a first cutting part for cutting the object to be cut provided from the supply part; a carrying part arranged to be consecutive to the first cutting part to carry an intermediate cut object cut by the firs...

The objective of the present invention is to provide: a molten iron manufacturing device of a Finex process for supplying heat to a fluidized bed within a fluidized reduction furnace without loss of reduction gas; and a molten iron manufacturing method using the same. To this end the molten iron manufacturing device...

A combustor according to the present invention comprises: a combustion chamber having a grate prov)A combustor according to the present invention comprises: a combustion chamber having a grate provided therein and a combustion space formed above the grate; a fuel supply part downwardly connected to the center part o...

A combustor according to the present invention comprises: a combustion chamber having a grate embedded therein and a combustion space formed above the grate; a fuel supply part downwardly connected to the center part of the grate so as to supply fuel to the upper part of the grate; an air supply part connected to th...

There is provided a low temperature curable anti-corrosion coating composition having a high degree of corrosion resistance, the anti-corrosion coating composition including: a silane compound in an amount of 5 wt% to 30 wt%, a polysilicate compound in an amount of 1 wt% to 10 wt%, a titanium compound in an amount o...

An embodiment of the present invention provides a solidification apparatus that makes a variation in the height of a molten metal surface relatively insensitive to the progress speed of a metal plate to significantly increase the progress speed of the metal plate and to enhance the productivity of the metal plate. T...

The present invention relates to a molten steel treatment apparatus and a molten steel treatment method applied to the same the apparatus comprising: a main body of which the inside opens upward and having a steel tapping hole formed at a bottom part thereof; a fixed dam extending in the width direction of the main ...

Coal briquettes a method for manufacturing same and a method for manufacturing molten iron are provided. The coal briquettes are charged in the dome part of a melting gasification furnace in an apparatus for manufacturing molten iron and rapidly heated wherein the apparatus for manufacturing molten iron comprises: i...

The present invention relates to an apparatus for manufacturing reduced iron and method for manufacturing reduced iron. The method for manufacturing reduced iron includes: i) drying ores in an ore drier; ii) supplying the dried ores to at least one reduction reactor; iii) reducing the ores in the at least one re...

A material processing facility according to the present invention comprises: a plurality of carriages each of which has first and second granules charged therein the first granules being materials for producing reduced iron and the second granules being materials for producing sintered ore and being located on the f...

The present invention relates to a method for recycling by products produced in the form of dust or sludge from a coal based ironmaking process and containing a large amount of valuable components in a process of manufacturing agglomerated reduced iron and to an agglomeration system. The present invention provides a...

A Process for making brique the win superior strongly.The briquette is composed of 100 weight parts of fine coal,1 to 5 weight parts of quicklime and 7 to 15 parts of molasses.The process involves the steps of mixing 1 to 15 weight parts of quicklime with 100 weight parts of fine coal,and aging the mixture,mixing 7 ...

A continuous casting and rolling method according to one example of the present invention comprises: a continuous casting step for producing a slab by a continuous caster; a rolling step for carrying out thickness reduction in the slab by a rolling mill; and a selective entering/exiting step which is carried out bet...

Casting equipment according to the present invention comprises: a ladle for accommodating molten steel; a mold solidifying the molten steel provided from the ladle so as to cast a slab; a movable hanger formed to extend in one direction so as to support the ladle; a ladle clamping means formed to extend in one direc...

The present invention provides a method for manufacturing coal briquettes in a molten iron manufacturing device including a melter-gasifier into which reduced iron is charged and a reduction furnace connected to the meltergasifier and providing reduced iron, the coal briquettes being charged into a dome portion of ...

Provided is a steel strip stabilisation device which allows shape correction and vibration suppression in steel strip and particularly plated steel strip in a non contact fashion. The configuration of one example of the steel strip stabilisation device consists of: a device support which is disposed on at least one ...

A rolling method according to one embodiment of the present invention may comprise: a rolling step for screwing down a supplied slab; and a heating step performed prior to or during the rolling step for heating the slab by placing a heater in the travel path of the slab immediately after a spot of the slab at which ...

Provided is a device for treating the dust of a compacting machine for recycling dust such as iron powder or fragments collected and treated in the process of manufacturing compacted iron and re treating dust thereby enabling the further enhancement of the stability of compacted iron and the manufacturing of high qu...

The present invention relates to a non-oriented electrical steel sheet. Provided are: a non-oriented electrical steel sheet having outstanding magnetic properties and comprising  as percentages by weight  from 1.0 to 3.0% of Al  from 0.5 to 2.5% of Si  from 0.5 to 2.0% of Mn  from 0.001 to 0.004% of N  from 0.0005 t...

A continuous casting and rolling apparatus according to an embodiment of the present invention comprises: a continuous casting machine that produces a slab; a rolling mill that includes a roughing mill located on a side of the outlet of the continuous casting machine and a finishing mill located on a side of the out...

Disclosed are a slab scarfing apparatus and a method for controlling the same. The slab scarfing apparatus according to an embodiment of the present invention comprises: an upper nozzle unit having an upper surface nozzle for scarfing an edge portion of the upper surface of a slab and having a first side nozzle whic...

The present invention provides a pillar member of a vehicle which is characterized by comprising: a pillar main body portion forming at least one closed cross section portion; and a connecting and joining portion provided on both ends of the pillar main body portion and coupled to a vehicle body. The pillar main bod...

The present invention relates to a segment for continuous casting which comprises: a first frame and a second frame which have a plurality of rollers for pressing a cast piece; a first actuating part installed on the first frame at one side of the travelling direction of the cast piece and rotatably connected to the...

There is provided a chromium-free coating composition for forming an insulation film, the composition having excellent corrosion resistance and excellent film adhesion and film strength after stress relief annealing (SRA), including, based on a lOOg phosphate solution having a solid content of 60% by weight, in whic...

NA

Disclosed is a steel sheet that exhibits an ultra-high strength after hot press forming followed by rapid cooling, and an enhanced yield strength after painting. The steel sheet has a composition comprising 0.1% to 0.5% by weight of C, 0.01 % to 1.0% by weight of Si, 0.5% to 4.0% by weight of Mn, 0.1 % by weight or ...

The present Invention relates to a method and an apparatus for immobilizing carbon dioxide, and the method of Immobilizing carbon dioxide including: providing a steel mill waste; concentrating the steel mill waste; dehydrating the concentrated steel mill waste; separating hydrogen and a precipitate formed by ...

The present invention relates to high manganese steel with superior weldability and to a method for manufacturing hot dipped galvanized steel sheets from same. The high manganese steel according to one aspect of the present invention is characterized by comprising by weight %: C: 0.3 1%; Mn: 8 25%; Al: 1 8%; Si: 0.1...

An apparatus and method for controlling channeling are provided. The channeling control apparatus includes: a plurality of tuyeres on an area basis that supply oxygen to each area that is partitioned into a plurality of spaces at the inside of a furnace; a channeling area sensing unit that previously senses a gas...

The present invention relates to a thin cold rolled steel plate used in home appliances and the like and a preparation method thereof and provides a thin cold rolled steel plate with high strength and high formability and a preparation method thereof. The present invention relates to an thin cold rolled steel plate ...

The present invention relates to an ultrahigh strength steel sheet and a manufacturing method therefor. More specifically the present invention can provide an ultra high strength steel sheet which can ensure weldability and a delayed fracture resistance property by controlling the contents of elements affecting plat...

The present invention relates to a foreign material removal device for removing foreign material attached to the surface of a rotating roll such as a strip transfer roll and the foreign material removal device comprises: a housing disposed in the width direction of an object; a foreign material separating means prov...

A magnetic bearing device according to one embodiment of the present invention may comprise: a support unit which is disposed to be adjacent to a roll shaft and forms a magnetic field toward the roll shaft; and a magnetic force receiving unit which is coupled to the roll shaft and only a part of which faces the supp...

Disclosed is a magnetic domain refinement method for a grain oriented electrical steel sheet the method in which a laser beam is radiated so as to have gaps on the surface of a grain oriented electrical steel sheet such that iron loss reduction and noise reduction can be enhanced in a region on which a steel sheet a...

Provided are: hot press formed (HPF) member having excellent powdering resistance during hot press forming; and a method for manufacturing same. The present invention relates to an HPF member having excellent powdering resistance during hot press forming the HPF member having a hot dip coating layer containing Al on...

The present invention relates to a raw material charging device and a charging method and more particularly to a raw material charging device and a charging method which can successively stack raw materials on a sintering truck in the descending order of particle size thereby improving the air permeability of the ra...

The present invention provides a tubular torsion beam for rear suspensions of vehicles, which is produced according to a more durable design capable of improving roll stiffness and roll strength of the tubular torsion beam. The tubular torsion beam is produced by pressure-forming a tubular steel member through hyd...

COMPOSITION FOR SURFACE-TREATING SINGLE-SIDE-PLATED STEEL SHEET, SURFACE-TREATED STEEL SHEET USING SAME COMPOSITION, AND METHOD FOR SURFACE-TREATMENT USING SAME COMPOSITION Provided are a surface-treating composition for a single-side-plated steel sheet, a steel sheet surface-processed by using same, and a surface-...

Presented is a method for increasing coke oven gas which can maximize the amount of coke oven gas generated, by optimizing steam input time. This method is characterized in that, in order that a water-gas reaction can progress at at least 500°C during a step for carbonizing coal in a carbonizing chamber in a coke ov...

Provided is a sealing device of a driving section for maintaining the airtightness of a driving section (a driving shaft) portion which passes through a sealed structure. The sealing device of a driving section includes: a structure mounting member which is mounted on a structure and through which a driving element ...

A molten metal processing device according to the present invention comprises a refining agent feeder: provided so as to penetrate the side wall of a container in the diameter direction of the container; provided so as to be positioned higher than the bath surface height of molten metal before an impeller is immerse...

Provided are a coal briquette and a method for manufacturing the same the coal briquette being inserted into a domed portion of a melting gas brazier of a molten iron manufacturing device and is heated rapidly the molten iron manufacturing device comprising a melting gas brazier into which reduced iron is inserted a...

An exemplary embodiment of the present invention provides an apparatus for blowing a reduction gas into a fluidized bed reduction furnace to supply the reduction gas to a flow layer over a distribution plate having passages. The apparatus includes: a flange that is attached to the top of the distribution plate a...

The present invention comprises: a plurality of sintering trailers which are arranged movably along a moving path and in which raw material is charged; an ignition furnace which is arranged on the upper portion of the sintering trailer and jets a flame to the upper surface of the raw material; a plurality of wind bo...

Disclosed herein are an apparatus and method for controlling the edge shape of a strip in a twin-roll strip casting process, which improve the quality of the strip by using cameras to photograph the edge portions of the strip being cast by strip casting, analyzing the photographs, and then controlling edge dams acco...

The present invention relates to a steel sheet for enameling which is not prone to the occurrence of surface defects such as fish scale defects and which has good formability. The steel sheet of the present invention comprises in wt %: more than 0 but no more than 0.005% of C; 0.1 to 0.5% of Mn; more than 0 but no m...

The present invention relates to an apparatus for manufacturing compacted iron and an apparatus for manufacturing molten iron comprising the same. The apparatus for manufacturing compacted iron comprises: i) a roll core comprising a shaft; and ii) a roll tyre surrounding a circumference of the roll core and having a...

A method for manufacturing a non oriented electrical steel sheet according to an embodiment of the present invention comprises the steps of: manufacturing a hot rolled sheet by heating a slab and then hot rolling the slab; subjecting the hot rolled sheet to hot band annealing; manufacturing a cold rolled sheet by co...

Disclosed are fine direct reduced irons containing iron carbide and a preparation apparatus thereof. The fine direct reduced irons containing iron carbide of the present invention contains 20 30 wt% of iron carbide by reducing poorly reducible ultrafine ore in a reduction furnace and forming iron carbide on the surf...

Provided is an apparatus for separating plate shaped HBI particles which is capable of flexibly handling variations in workload according to the production volume and prevents the spaces between rotors from becoming clogged by the HBI during increased production volume. The structure of the apparatus comprises: a mo...

Disclosed are an iron ore powder reducing device and reducing method. The iron ore powder reducing device according to the present invention comprises: a coarse ore preliminary reduction furnace into which is charged iron ore powder and which subjects the iron ore powder to preliminary reduction by means of a reduci...

A grain oriented electrical steel sheet and a manufacturing method therefor are disclosed. According to one embodiment of the present invention the method for manufacturing a grain oriented electrical steel sheet comprises the steps of: providing a slab comprising 1.0 4.0 wt% of Si 0.1 0.4 wt% of C and the balance o...

Provided is a method for manufacturing an electric mattress. The method for manufacturing the electric mattress includes: a step of melting the surface of a steel plate by irradiating a laser beam to form a groove having first and second side surfaces and a bottom surface; and a step of air blow or suction molding t...

The present invention relates to a method and apparatus for uniformly controlling the strip temperature of the rapid cooling section of a continuous annealing line and provides same. Cooling nozzle blocks for controlling the strip temperature are each installed in plurality on the front and back surfaces of a strip ...

A non oriented magnetic steel sheet and a method for manufacturing the same are disclosed. A non oriented magnetic steel sheet according to the present invention comprises 0.00 5wt% or less of C 1.0~4.0 wt% of Si 0.1~0.8 wt% of Al 0.01~0.1 wt% of Mn 0.02~0.3 wt% of P 0.005 wt% or less of N 0.001~0.005 wt% of S...

Provided is a method for producing briquettes in which in an apparatus for producing molten iron comprising a melter gasifier into which reduced iron is fed and a reducing furnace connected to the melter gasifier and supplying the reduced iron the briquettes are fed into the domed part of the melter gasifier and ...

The present invention relates to a ferritic stainless steel having excellent corrosion resistance against condensate moldability and high temperature oxidation resistance wherein the ferritic stainless steel is capable of being manufactured in an economically advantageous manner without adding expensive alloying ele...

The present invention provides a device for coiling and uncoiling a bar between a roughing mill and a finishing mill when performing hot rolling the device comprising: a sealed furnace which is arranged between the roughing mill and the finishing mill heats the bar received therein and keeps the bar at a constant te...

A meniscus flow control device according to the present invention comprises: a meniscus flow detection unit for detecting in a meniscus flow form of molten steel relative temperature values for positions measured by a plurality of temperature measurers and relatively comparing the temperature values measured by the ...

The present invention provides a size variable casting mold which includes a pair of fixed sides positioned such that the fixed sides face each other at a distance from each other; and a pair of movable sides which is positioned between the fixed sides such that the movable sides may move in the state in which the b...

In order to feed a mixture having a uniform particle size and density into a forming machine and increase the quality of coal briquettes a coal briquette manufacturing apparatus is provided which comprises: a mixer that mixes powdered coal and a binder to produce a mixture; a pre forming machine that is connected t...

Provided are a molten iron manufacturing method and a molten iron manufacturing apparatus by which a reformed gas is manufactured using a hydrocarbon gas thereby improving the reducing power of reduced iron in a reducing furnace. The molten iron manufacturing method comprises the steps of: i) providing exhaust gas ...

According to one embodiment of the present invention a grain oriented electrical steel sheet comprises: 0.005 0.5 wt% of Ba 0.005 0.5 wt% of Y or 0.005 0.5% of Ba and Y in a substrate steel sheet; and the balance of Fe and impurities.

Disclosed are a molten iron manufacturing apparatus and a molten iron manufacturing method. The molten iron manufacturing apparatus according to the present invention comprises: a drying device which dries a material containing carbon using exhaust gas discharged in the steelmaking process; a gasification furnace wh...

Provided is a tuyere assembly for a molten iron manufacturing apparatus which is capable of preventing tuyere damage and reducing the combustion focal distance for higher combustion efficiency of an auxiliary fuel and minimizing the abrasion of an intake pipe caused by the intake of the auxiliary fuel. The present...

A method for manufacturing coal briquettes charged into a dome part of the melter-gasifier to be rapidly heated in an apparatus for manufacturing molten iron including a melter-gasifier into which reduced irons are charged, and a reducing furnace connected to the melter-gasifier and providing the reduced iron. T...

Disclosed are a method for manufacturing a carbon dioxide adsorbent and a method for reducing carbon dioxide and an apparatus for same. The method for manufacturing a carbon dioxide adsorbent according to one embodiment of the present invention comprises: providing steel mill waste; mixing the steel mill waste with ...

A continuous casting and rolling apparatus according to one embodiment of the present invention comprises: a continuous casting apparatus for producing a steel sheet; a roller linked to the continuous casting apparatus for receiving the steel sheet; and a push heat unit connected to the continuous casting apparat...

Disclosed is a raw material charging device for supplying raw sintering materials to a sintering trolley the device comprising: a hopper in which the raw sintering materials are charged; a drum feeder provided at a lower part of the hopper and discharging from the hopper the raw sintering materials while rotating; a...

The present invention relates to a continuous cast slab and a manufacturing method for the same, wherein solidified layers of a cast slab having a non-solidified layer are compressed with each other during a continuous casting process to fundamentally prevent occurrence of defects, such as center segregation or po...

Disclosed are an ultrasonic flaw detection apparatus for detecting a flaw of a steel plate and an ultrasonic flaw detection method using the same. The ultrasonic flaw detection apparatus comprises: a spray nozzle that is installed below a steel plate in transit and sprays a medium toward the steel plate to form a me...

The present invention relates to a method and device for removing dust particles from reducing gas. The method of the present invention comprises a step of providing reducing gas a step of injecting the reducing gas into a chamber including a sacrificial nozzle therein and a step of discharging the reducing gas from...

A Zn alloy plated steel sheet having excellent phosphatability and spot weldability and a method for manufacturing the same are provided. In the Zn alloy plated steel sheet including a base steel sheet and a Zn alloy plating layer, the Zn alloy plating layer includes, by wt%, Al: 0.5-2.8%, Mg: 0.5-2.8%, and a remain...

The present invention relates to a reduced iron production method and production device and more specifically relates to a reduced iron production method and production device whereby reduced iron having an outstanding rate of reduction is produced by using iron ore containing large amounts of the impurities phospho...

The present invention provides continuous casting milling equipment and method capable of switching between continuous and batch milling which increase the process yield rate by reducing the portion which is unavoidably processed as scrap when switching casting or at an initial stage. The continuous casting milling ...

The molten iron manufacturing apparatus according to one aspect of the present invention comprises: an iron ore mixing and pre reducing furnace for charging and mixing natural iron ore and oxidized iron ore which has been supplied from an iron ore oxidizing combustion furnace and for heating or pre reducing the iron...

The present invention relates to a grain oriented electrical steel sheet having excellent core loss and to a method for manufacturing same. The electrical steel sheet according to one aspect of the present invention may have a composition comprising by weight% Si: 1.0 to 4.0% Al: 0.1 to 4.0% and a rare earth element...

A molten iron manufacturing apparatus according to the present invention comprises: a plurality of reduction furnaces for manufacturing reduced iron using an iron containing mixture introduced thereinto; a supply bin connected to the reduction furnaces the reduced iron being introduced into the supply bin; a redu...

Provided are an apparatus and method for manufacturing molten iron. The apparatus for manufacturing molten iron according to the present invention comprises: a multi stage fluid bed furnace for converting fine iron ore into reduced fine iron through reduction; at least one high temperature compacting unit for prepar...

The present invention relates to a grain oriented electrical steel sheet and to a method for manufacturing same. Provided is a method for manufacturing a grain oriented electrical steel sheet which includes: after hot rolling a steel slab so as to produce a hot rolled strip performing or omitting a hot rolled strip ...

The present invention relates to casting equipment for producing a casting with a large cross-section for a very thick steel material and a casting method using the same, and the casting equipment includes: a casting part with a passage for a molten steel for casting the molten steel into a casting; a support part a...

Disclosed is a direct-reduced iron agglomeration apparatus. According to the present invention, the direct-reduced iron agglomeration apparatus includes: a feeding box which is installed above a pair of rolls, and supplies direct reduced iron, which is supplied by double screw feeders, between th5 e pair of roll...

An object of the present invention is to provide a method for manufacturing high-strength cold-rolled/hot-rolled DP steel having a tensile strength grade of 590 MPa and excellent workability, as well as little deviation in the material properties thereof, wherein said excellent workability can be achieved using...

The aim of the present invention is to provide a method for manufacturing high-strength cold-rolled TRIP steel having a tensile strength of 590 MPa grade and low mechanical- property deviation, in which a thin-slab casting technique is employed to ensure superior workability and also significantly reduce widthw...

Provided is a steel strip stabilizing apparatus which damps vibrations of a plated steel strip in a non contact manner or corrects the shape of the plated steel strip. The steel strip stabilizing apparatus comprises: a plurality of steel strip damping means arranged toward the steel strip on at least one side of a s...

The present invention relates to a high carbon steel sheet having superior strength and ductility and a method for manufacturing iihe same. A high carbon steel sheet according to one exemplary embodiment of the present invention comprises 0.2 to 1.0wt% carbon (C), 0 to 3.0wt% silicon (Si), 0 to 3,0wt% manganese (IvI...

The present invention relates to a high carbon hot rolled steel sheet having excellent uniformity and to a method for manufacturing same in which the components and the structure of the steel are precisely controlled and manufacturing conditions are adjusted to achieve excellence in uniformity among hot rolled struc...

The present invention provides a casting roll of a twin-roll strip caster, including: a nickel plating layer formed on an outer circumferential surface and an end surface of the casting roll; a nickel-boron alloy plating layer formed on the nickel plating layer located on the end surface of the casting roll; and a h...

The present invention relates to non-oriented electrical steel sheets that are magnetized by SRA treatment and a manufacturing method thereof. The technical essence of the invention lies in: the non-oriented electrical steel sheets having strong magnetism by SRA treatment and comprising Si: 0.2 ~ 1.0%, Al: 0.9 ~ 2.0...

THE PRESENT INVENTION RELATES TO A MARTENSITIC STAINLESS STEEL PRODUCED BY A TWIN ROLL STRIP CASTING PROCESS AND A METHOD FOR MANUFACTURING THE SAME. THE KEY TECHNICAL FEATURES OF THE PRESENT INVENTION ARE FOR A MARTENSITIC STAINLESS HOT ROLLED STEEL SHEET HAVING SUPERIOR CRACK RESISTANCE, MANUFACTURED BY A TWIN ROL...

THE PRESENT INVENTION RELATES TO AN APPARATUS AND METHOD FOR CONTROLLING OSCILLATION OF AN EDGE DAM OF A TWIN ROLL STRIP CASTER. THE KEY TECHNICAL FEATURES OF THE PRESENT INVENTION ARE FOR AN APPARATUS AND METHOD FOR CONTROLLING HORIZONTAL OSCILLATION OF AN EDGE DAM OF A TWIN ROLL STRIP CASTER, WHEREIN THE APPARATUS...

Provided are an apparatus and method for manufacturing reduced iron. The method for manufacturing reduced iron includes degrading pulverized iron ore and reducing the pulverized iron ore by means of at least one rotary flow reduction device using reduction gas. Thus ultra pulverized iron ore may be reduced using the...

A method for manufacturing coal briquettes according to one embodiment of the present invention comprises: a step of preparing coal; a step of drying the coal; a post drying moisture measurement step for measuring the moisture content contained in the dried coal; a step of providing a mixture by mixing the dried coa...

Provided are an apparatus and method for manufacturing molten iron. According to the present invention the apparatus for manufacturing molten iron comprises: a multistage fluidized bed furnace for reducing iron ore powders to obtain reduced iron powders; a high temperature compacting unit for compressing the reduced...

Provided are a method for forecasting a sharp drop of a pressure of a melter-gasifier and a method for controlling the pressure in an ironmaking process using non-coking coals and fine iron ores which can previously forecast the sharp drop of the pressure of the melter-gasifier to stably maintain an operation of the...

There is provided a steel having excellent resistance to corrosion by hydrochloric acid and sulfuric acid, and a method for manufacturing the same. The steel includes, by weight%: greater than 0 to 0.15% C, greater than 0 to 1.0% Si, greater than 0 to 2.0% Mn, greater than 0 to 0.03% S, greater than 0 to 0.02% P, 0....

There are provided a grain-oriented electrical steel sheet having excellent magnetic properties and a method for manufacturing the same. More particularly, there are provided a grain-oriented electrical steel sheet whose magnetic properties is remarkably improved to the extent that is unexpected in similar component...

Provided are a high strength cold-rolled steel sheet with excellent weather resistance and a manufacturing method thereof. The cold-rolled sheet includes, by weight, 0.08 to 0.20% C, 0.1 to 0.5% Si, 1.2 to 2.0% Mn, ≤0.03% P, ≤0.01% S, 0.02 to 0.07% Al, 0.02 to 0.06% V, 0.2 to 0.5% Cu, 0.3 to 0.8% Cr, 0.04 to 0.08% Z...

The present invention relates to a production method for high-carbon martensitic stainless steel as used in razorblades, knives and the like, which contains, as percentages by weight, 0.40 to 0.80% carbon and 11 to 16% chromium as main components. Provided is a production method for high-carbon martensitic stainless...

A coil assembly for an induction heating device according to an embodiment of the present invention may comprise: a first coil part which has on one surface thereof a first cooling pipe insertion groove indented to the inside thereof; a first cooling pipe coupled to the first cooling pipe insertion groove so that a ...

An exemplary embodiment of the present invention provides a method for manufacturing a fine spheroidized steel sheet having an excellent heat treatment characteristic, the method including: i) manufacturing a high carbon slab that is formed of 0.3 to 1.0 wt% of C, 0.1 to 1.2 wt% of Mn, 0 to 0.4 wt% of Si, 0.01 to 0....

Embodiments of the present invention relate to an apparatus for manufacturing molten iron  including a molten iron manufacturing furnace for producing the molten iron and generating a byproduct gas  a carbon dioxide reforming device for reforming the byproduct gas to generate hydrogen and carbon monoxide  and an iro...

The present invention provides a manganese-containing molten steel production method comprising: a preparation step in which a molten ferroalloy or a molten non-ferrous metal is prepared by carrying out denitrification or nitrogen-absorption prevention during a procedure of retaining the molten ferroalloy or molten...

The present invention relates to a slab processing method and a slab processing system, which can manufacture hot rolled steel plates with high quality edges and increase the operating rate of machinery. In particular a slab processing method according to an embodiment of the present invention comprises the steps ...

The present invention includes a method of manufacturing molten iron which can improve bad tapping from a melting furnace by improving fluidity of slag in the melting furnace, and increases fluidity of slag by adding a powder for decreasing the melting point of slag into a melting furnace through a tuyere of the me...

Disclosed are a high strength thin steel sheet with excellent drawability and bake hardenability and a method for manufacturing the same the high strength thin steel sheet comprising: 0.0005 to 0.003 wt% of C; 0.5 wt% or less (excluding 0 wt%) of Si; 1.2 wt% or less (excluding 0 wt%) of Mn; 0.005 to 0.12 wt% of P; 0...

A method and a device for manufacturing coal briquettes are provided. According to the present invention, the method for manufacturing coal briquettes may include: a coking coal providing step of providing coking coal having a predetermined grain size; a binder and curing agent providing step of providing a bind...

The present invention relates to a film formation composition for improving the blackening of the surface of a steel sheet, particularly, the surface of a steel sheet containing Mg on the surface thereof, such as a Mg sheet, a plated steel sheet having a plated layer comprising Mg, and the like, a steel sheet compri...

Coal briquettes, and a method and an apparatus for manufacturing the same, are disclosed. An embodiment of the present invention provides coal briquettes that are put into a dome of a melting-gasifying furnace in an apparatus for manufacturing molten pig iron, which includes a melting-gasifying furnace receiving ...

An apparatus and a method for endless rolling include a finishing rolling unit rolling a steel sheet to a target thickness using as many rolling stands from among a plurality of rolling stands as set by a control signal to be input; and a control unit setting a rolling stand number based on the target thickness to b...

Coal briquettes and a method of producing coal briquettes that are charged in a dome portion of a melter gasifier furnace to be quickly heated in a molten iron production apparatus including the melter gasifier furnace in which reduced iron is charged and a reduction furnace that is connected to the melter gasifier ...

An emptying standpipe discharging device of molten iron facilities is provided. The emptying standpipe discharging device according to the present invention includes: fluidized-reduction furnaces of a multiple stages reducing a powder iron ore while forming a fluidized bed; a melting gas furnace supplying a redu...

Provided is an apparatus for reducing carbon dioxide by using hot molten slag and a flue gas containing carbon dioxide. The apparatus includes a slag atomizer spraying the molten slag to form slag powder a carbonization reactor for a carbonization reaction between the slag powder and the carbon dioxide and a flue ga...

There are provided an apparatus and method for controlling a width of a multi-stand rolling mill. The width controlling apparatus includes a measuring unit measuring the steel sheet passing through a plurality of rolling stands, thus generating at least one of a measured temperature value, a measured stress value an...

A mold vibrating apparatus for a continuous caster includes an apparatus body and a vibrating unit including at least 3 vibrating parts connected to and combined with the apparatus body and a mold of the continuous caster.

Provided are a system and a method for compacting direct reduced iron. The system for compacting the direct reduced iron includes: a first reservoir in which dense iron oxide is stored; a second reservoir connected with the first reservoir to receive the iron oxide; an iron oxide supply line of which one side is ...

The present invention relates to a method of manufacturing molten iron using an improved charging method, and an apparatus for manufacturing molten iron using the same. The method of manufacturing molten iron according to the present invention includes: preparing iron-containing materials; converting the iron-conta...

An apparatus for charging fine iron ore is provided. According to an exemplary embodiment of the present invention, an apparatus for charging fine iron ore is provided. The apparatus includes: a transport pipe transporting fine iron ore to an upper portion thereof by inducing a gas-fine iron ore flow using a gas;...

Provided is a method of managing final strip exit from a finishing mill, which includes increasing a rolling thickness of a tail-end portion of a strip by sequentially increasing roll gaps of a plurality of stands along a running direction of the strip immediately prior to a final strip exit event of the tail-end po...

A method for manufacturing a binder for a coal briquette for manufacturing molten iron is provided. A method for manufacturing a binder for a coal briquette for manufacturing molten iron includes i) preparing a mixture by mixing molasses and water, ii) adding an acid to the mixture, iii) fermenting the mixture by...

Disclosed is a method of forming a continuous channel for gas discharge in the surface of a casting roll for twin roll strip casting, and particularly, a method of forming a continuous channel for gas discharge on the surface of a casting roll for twin roll strip casting, suitable for the formation of dimples on the...

Disclosed is a casting roll for a twin roll strip caster, and particularly, a casting roll for a twin roll strip caster, in which a continuous gas channel, for preventing the generation of dents in the surface of a strip when casting TWIP steel in order to improve the mechanical properties of the strip, including in...

In an ironmaking system using non-coking coal and fine iron or directly in furnace operations without any additional treatment, a byproduct sludge recycling apparatus powders wet byproduct sludge which is by-produced in water treatment of discharge gas and then re-blows sludge powder into fluidized-bed reduction rea...

In an ironmaking system using non-coking coal and fine iron or directly in furnace operations without any additional treatment, a byproduct sludge recycling apparatus powders wet byproduct sludge which is by-produced in water treatment of discharge gas and then re-blows sludge powder into fluidized-bed reduction rea...

Provided is a reduction furnace reducing ore containing an iron oxide component, and including a charge feeding port 110 having a charge material introduced therethrough and a reducing gas intake port 170 having reducing gas injected therethrough, wherein the charge feeding port 110 is formed in an upper portio...

Disclosed herein is a weldable pre-sealed steel sheet with improved corrosion resistance and weldability. The pre-sealed stall I FhS&t comprises (a) a metal base, (b) a chromium-free pre- treatment coating layer formed on at least one surface of the metal base, and (c) a pre-sealed resin coating layer formed on at l...

[ABSTRACT] The present invention relates to an apparatus for manufacturing molten irons and a method for manufacturing molten iron using the same. The method for manufacturing molten irons according to the present invention includes reducing first iron ores by charging the first iron ores into a fluidized-bed reduc...

A high strength ductile steel sheet for extra deep drawing mainly used for interior or exterior plates of automobile bodies, and a method for manufacturing the same are disclosed. The steel sheet comprises, by weight%, C: 0.010% or less, Si: 0.1 %or less, Mn: 0.06 " 1.5%, P: 0.15% or less, S: 0.020%or less, Sol. Al:...

A hot rolled steel sheet used for a bumper reinforcing material or. for an impact absorption material in a door of automobiles, and a method Tor manufacturing the same are disclosed. The steel sheet comprises, by weight%, C: 0.2% ' 1%, Mn: 8 - 15%, S: 0.05% or less, P: 0.03% or less, and the balance of Fe and other ...

An injection tuyere of a melter-gasifier according to the present invention includes a tuyere body, an opening for injecting oxygen that is formed to penetrate a center portion of the tuyere body, a cooling tube that is formed in the tuyere body, a fine coal injection tube that is formed to penetrate the tuyere body...

Provided is an apparatus for manufacturing molten iron using directly fine or lump coal and fine iron-contaning ores,a method thereof an intregrated cool mill using the fine,and a method thereof.The method of manufacturing the melten Iron comprises the steps of manufacturing iron-containing mixture by mixing fine ...

A high-strength isotropic cold-roiled steel sheet having excellent shape fixability, and a method for manufacturing the same are disclosed. The steel sheet is made using a low-carbon steel comprising a little amounts of Ti to have an r of 1.3 or less, r approaching I, and a low in-plane anisotropy index (Dr) of...

Disclosed herein are a coal briquette for a smelting reduction process in which coal and iron ore are charged in to a smelting furnace to produce a molten iron, and a method for manufacturing the coal briquette. The coal briquette comprises 50% by weight or less of at least one of sludge and dust and the balance of ...

The present application discloses a substrate that includes a molecular layer of regularly spaced size-controlled macromolecules comprising a polymer comprising branched and linear regions in which a plurality of termini on the branched region are bound to the substrate, and a terminus of the linear region is functi...

Disclosed are a ferritic stainless steel and a method for manufacturing the same. The ferritic stainless steel comprises, in terms of % by weight: QO 1% or less C; QO 1% or less N; 1.0% or less Si; 1.0% or less Mn; 1QO~2QO% Cr; Q15% or less Al; Q0005~Q002% Ca; Q0018~Q01% Zr; QOO4~QOO8% O; and the balance of Fe and o...

The present invention relates to an apparatus and method for manufacturing molten iron while reusing an offgas of the packed bed reduction reactor and improving energy efficiency. A method for manufacturing molten iron includes i) charging fine ore into at least one fluidized-bed reduction reactor and manufacturing ...

Provided are a steel sheet for an automotive muffler and a method for producing the steel sheet The steel sheet includes 0.01% by weight or less of C, 0.1 to 0.3% by weight of Si, 0.3 to 0.5% by weight of Mn, 0.015% by weight or less of P, 0.015% or less by weight of S, 0.02 to 0.05% by weight of A1,0.004% or less o...

The present invention provides a robust control method for maintaining a melt level at a constant value in a mold in a twin roll strip casting process. In the twin roll strip casting process, whether using a stopper system (3), which is provided in a tundish (2) to supply melt into the mold, or using a camera system...

An apparatus for manufacturing compacted iron according to the present invention includes at least one pair of molding rolls that compress fine materials and manufacture compacted iron, and a crusher that crushes the compacted iron manufactured in the molding rolls. The crusher includes a shaft that is provided w...

An apparatus for manufacturing compacted iron for manufacturing reduced materials containing fine reduced iron into compacted iron and an apparatus for manufacturing molten iron provided with the same are provided. The apparatus for manufacturing compacted iron includes i) a charging hopper having an opening through...

An apparatus for manufacturing compacted iron includes at least one pair of molding rolls that compress fine iron and manufacture compacted iron. The pair of molding rolls include a shaft provided with a cooling passage, and a roll tyre that surrounds the shaft to be combined together.

An apparatus for manufacturing compacted iron for manufacturing reduced materials containing fine reduced iron into compacted iron and an apparatus for manufacturing molten iron provided with the same are provided. The apparatus for manufacturing compacted iron includes i) a charging hopper into which reduced materi...

Disclosed is duplex stainless steel that contains relatively low content of Ni, and limits constituents of Cr-Mo-Mn-N to make volume frac- tion of a and γ have about 50:50, thereby minimizing incidence of a edge crack to enhance a production yield and decrease a processing load, in which the alloy constituents...

A chrome free composition for metal surface treatment and a surfacetreatedmetal sheet can provide excellent characteristics of high conductivity, corrosion resistance, alkali resistance, and high temperature and humidityresistance. The composition includes a vinyl based binder resin, an acrylbased binder resin, and ...

A briquette with a superior strength and process for making the briquette. The briquette is composed of 100 weight parts of fine coal, 1 to 5 weight parts of quicklime and 7 to 15 weight parts of molasses. The process involves the steps of mixing 1 to 5 weight parts of quicklime with 100 weight parts of fine coal, a...

The present invention relates to a method for manufacturing molten iron by injecting a hydrocarbon gas and an apparatus for manufacturing molten iron using the same. A method for manufacturing molten iron according to an embodiment of the present invention includes: i) converting iron ore into reduced materials whil...

The anticancer agent according to an embodiment of the present invention provides a peptide having an amino acid sequence selected from the group consisting of SHQ ID NO: 4, SEQ ID NO: 11, and a combination thereof. The anticancer agent is used for inhibiting cancer originating from colon, pancreas, breast, lung, br...

A bake-hardenable cold rolled steel sheet, and a method of manufacturing the same, designed to have bake hardenability and excellent formability suitable for automobile bodies, and the like. The steel sheet comprises 0.003 ~ 0.005 % C, 0.003 ~ 0.03 % S, 0.01 ~ 0.1 % Al, 0.02 % or less N, 0.2 % or less P, 0.03 ~ 0.2...

Disclosed is a paint composition having high far-infrared radioactivity, antibiotic activity and solvent resistance and a precoated metal sheet for home appliances, coated with the paint composition. According to the current invention, a paint composition including a thermosetting resin, 9-60 parts by weight of cera...

Disclosed is a method for improving surface properties of the stainless steels for bipolar plate of polymer electrolyte membrane fuel cell having low interfacial contact resistance and excellent corrosion resistance. The method for improving surface properties of the stainless steels according to one exemplary embod...

Disclosed herein are a high-manganese hot-dip coated steel sheet exhibiting high ductility and high strength, mainly used for inner and outer panels of automobiles, and a method of manufacturing the same. The high-manganese hot-dip coated steel sheet includes a substrate steel sheet having a composition of (in weigh...

The present invention relates to a method for manufacturing molten iron that improves charging and discharge of the fine iron ore, and an apparatus for manufacturing molten iron using the same. The apparatus for manufacturing molten iron according to an embodiment of the present invention includes i) at least one fl...

An apparatus for manufacturing molten iron according to an exemplary embodiment of the present invention includes i) at least one fluidized-bed reduction reactor that converts iron ore into reduced materials by reducing and plasticizing the iron ore, ii) a melter-gasifier into which the reduced materials are charged...

The present invention provides a carbon steel sheet having high formability due to a microscopic and uniform carbide distribution and having a good characteristic of final heat treatment, and a manufacturing method thereof. Such a present invention provides a carbon steel sheet having excellent formability, wherein:...

A method for manufacturing a steel sheet used for structural members, elements, etc. of au-tomobiles, such as a variety of members of automobiles including a front side member, pillar, and the like, and more particularly, a method for manufacturing a steel sheet having a high strength and formability as well as hot-...

The present invention relates to a bioadhesive derived from mussel. In particular, it relates to a novel Mytilus galloprovincialis foot protein type 5 (MGFP-5) and a recombinant protein that is a hybrid of MGFP-5 and foot protein type 1 (FP-1), where an adhesive protein with adhesive activity can be economically mas...

The present invention relates to a method for manufacturing molten iron containing nickel. The method for manufacturing molten iron containing nickel includes: i) providing sintered nickel ore by sintering nickel oxide ore; ii) charging a mixture containing the sintered nickel ore, coke, and at least one material se...

Disclosed herein is a Nb-Ti composite IF steel in which fine precipitates, such as CuS precipitates, having a size of 0.2 µm or less are distributed. The distribution of fine precipitates in the Nb-Ti composite IF steel enhances the yield strength and lowers the in-plane anisotropy index. The nanometer-sized precipi...

Provided is a chromium-free, low-temperature curable, metal-surface treatment composition comprising 5 to 30 parts by weight of a silane compound having an epoxy group and a silane compound having an amino group or a hydrolytic condensate thereof; O.I to 5 parts by weight of a vanadium compound; 0.1 to 5 parts by we...

A lubricant supply apparatus for endless hot rolling equipment includes a width-detecting sensor (WS) for detecting widths of steel sheets continuously supplied toward a roller (R), a Controller (C) connected to the width-detecting sensor (WS), a lubricant pump (OP) connected to and controlled by the Controller to s...

An apparatus for manufacturing molten iron according to an embodiment of the present invention includes i) at least one fluidized-bed reduction reactor that reduces and plasticizes fine iron; ii) an apparatus for manufacturing compacted iron that molds the fine iron and manufactures compacted iron; iii) a melter-...

The present invention relates to an apparatus for manufacturing compacted iron. An apparatus for manufacturing compacted iron includes i) a pair of rolls that compact direct reduced iron and manufacture compacted iron; and ii) a screw feeder that rotates to transfer the direct reduced iron toward a gap formed bet...

An apparatus for generating energy using sensible heat of an offgas during manufacture of molten iron and a method for generating energy using the same are provided. The method for generating energy includes i) providing an offgas discharged from an apparatus for manufacturing molten iron including a reduction react...

The present invention relates to an aqueous silver-containing solution containing nano-sized silver particles, an antibacterial resin composition comprising the same and being capable of imparting superior antibacterial activity, corrosion resistance, conductivity and adhesion to a steel plate, and a steel plate coa...

A gas wiping apparatus is a type of equipment for coating a molten metal onto a steel strip, in which the molten metal solution deposited on the steel strip is wiped to adjust a coating thickness. The gas wiping apparatus includes a body containing a high pressure gas and a multiple nozzle unit disposed at the body ...

The invention relates to steel with excellent weather resistance, and a manufacturing method therefore According to the invention, the steel consists of up to 0.15wt% C, up to 1.0wt% Si, up to 2.0wt% Mn, 0.2 to l.0wt% Cu, 0.2 to 5.0wt% Ni, 0.001 to O.I wt% Al, up to 0.03wt% P, 0.002 to 0.03wt%S, 0.001 to 0.0lwt% Ca....

The present invention relates to a non-oriented electrical steel sheet, widely used as an iron core in electric devices, and to a method of manufacturing the same. The non-oriented electrical sheet includes 0.004 wt. % or less C; 1.0-3.5 wt. % Si; 0.02 wt. % or 1ess P ; 0.001 wt. % or less S ; 0.2~2.5 wt. % Al; 0....

A casting roll moving apparatus for a twin roll type continuous strip casting process is disclosed. The casting roll moving apparatus of the present invention is used with a twin roll type strip casting machine that produces a strip through a method in which, while high-temperature steel melt is supplied between t...

An apparatus and method for recovering Zn component contained in dust and sludge by vaporization and Fe component in the form of molten iron by reduction to reduce cost of sludge treatment and to prevent environmental pollution. A plurality of raw material feed bins (110a, 110b, and 110c) respectively store and disc...

Disclosed is a method for preparing chiral amines and the method includes reacting ketoxime represented by formula I, palladium, a lipase, an acyl-donating compound, and a tertiary amine to prepare an amide represented by formula IV, and the amide is hydrolyzed. R1 is hydrogen, an alkyl, an alkoxy, phenyl, or a ph...

Disclosed ate peptides having SEQ ID NOs: 1 to 24 that induce superoxide generation by human monocytes or neutrophils; that induce an intracellular calcium increase by human peripheral blood monocytes or neutrophils; binds to formyl peptide receptor or formyl peptide receptor-like 1; that induce chemotactic migratio...

A continuous casting and rolling method according to one embodiment of the present invention can comprise: a continuous casting step of producing a slab; and a rolling step of pressing the slab after a front end portion of the slab passes a first rolling stand into which the front end portion of the slab which is pr...

The present invention relates to an apparatus for manufacturing molten iron and a method of manufacturing the molten iron. The apparatus for manufacturing molten iron includes at least one reduction reactor, a melter-gasifier, an offgas supply line, and at least one reformer. The at least one reduction reactor reduc...

An apparatus for manufacturing molten iron according to an exemplary embodiment of the present invention includes i) at least one fluidized-bed reduction reactor that reduces and plasticizes iron ore and converts the iron ore into reduced materials, ii) a melter-gasifier into which the reduced ore is charged and oxy...

A tuyere assembly that is capable of improving the combustion rate of an auxiliary fuel is provided. The tuyere assembly that is installed at a melter-gasifier for forming melted iron includes a tuyere where a gas passage used for injecting an oxygen-containing gas into the melter-gasifier and a pair of fuel injecti...

The present invention relates to a method of manufacturing a binderless briquette and an apparatus for performing the same. The method of manufacturing the binderless briquette includes providing a dust gathered by using a dry collection manner from an offgas discharged when an iron ore is dried, providing a reduced...

The present invention relates to a reduction furnace including a charging device that is capable of preventing segregation and an apparatus for manufacturing molten iron including the same. The reduction furnace for reducing an iron-containing material used for manufacturing molten iron may include a charging hole w...

There are provided a device and method for detecting joint parts of a steel strip in an endless hot rolling process. In particular, there are provided a device and method for accurately detecting joint parts of a steel strip in an endless hot rolling process. The device for detecting joint parts of a steel strip in ...

Disclosed is a coating composition having superior compatibility and surface gloss for forming an insulating film and a method of forming the film. The coating composition includes, based on 100 g of a mixture solution of monoaluminum phosphate and monozinc phosphate, 0.5-5 g of a mixture solution of cobalt hydroxid...

Provided are an apparatus and method for stably recovering an excess gas generated in an ironmaking process. The excess gas recovery apparatus of the ironmaking process includes an excess gas recovery line, one or more gas storage unit, and a compressor. The excess gas recovery line is associated with at least one o...

There are provided a hot rolled steel sheet that has superior hot press forming property and high tensile strength and is used for structural members and their parts of automobiles and the like, a formed article, and a method for manufacturing the hot rolled steel sheet and the formed article. The hot rolled steel s...

There is provided a high strength steel plate with high manganese having excellent burring workability, which is used for structural members, bumper reinforcing materials and impact absorbing materials of automobiles, etc. The high strength steel plate includes, by weight: C: 0.2 to 1.0 %, Mn: 10 to 25 %, Al: 0.3 to...

Disclosed herein is a Ti-based IF steel in which fine precipitates, such as CuS precipitates, having a size of 0.2 µm or less are distributed. The distribution of fine precipitates in the Ti-based IF steel enhances the yield strength and lowers the in-plane anisotropy index. The nanometer-sized precipitates allow th...

There is provided a chrome-free resin composition for surface-treating a steel sheet having excellent corrosion resistance, alkaline resistance, processibilities and conductivity, chemical resistance, a method for manufacturing a steel sheet using the same, and a surface-treated steel sheet manufactured according to...

A resin composition for a pre-coated steel sheet having good processibility, heat resistance, and corrosion resistance, and a pre-coated steel sheet fabricated by using the resin composition are disclosed. The resin composition includes a 10 to 40 parts by weight of a hardener comprising end-capped blocked polyisocy...

The present invention relates to a method for manufacturing molten iron by injecting a gas containing hydrocarbons and an apparatus for manufacturing molten iron using the same. The method for manufacturing molten iron includes reducing iron ore in a reduction reactor and converting the iron ore into reduced materia...

A Cr-free steel sheet includes a Zn-based electroplated steel sheet, a Cr-free layer which is formed by a Cr-free treatment liquid coated on the steel sheet, the Cr-free treatment liquid containing silicate of 3 to 40 parts by weight, silane of 0.5 to 10 parts by weight, titanium compound of 0.2 to 8 parts by weight...

Disclosed herein are a spangle-free, hot-dip galvanized steel sheet, and a method and device for manufacturing the same. The hot-dip galvanized steel sheet is characterized in that a solidified zinc crystal of hot-dip galvanized layer has an average crystalline texture particle diameter of 10 to 88, and there is no ...

Disclosed is a recycling method of waste material in a coal based iron making process by using a reduction-melting apparatus which includes a reduction furnace for reducing ore and supplementary raw material, a melter gasifier for reduction-melting reduced iron fed from the reduction furnace into hot metal, a cyclon...

Disclosed herein is an apparatus for refining a magnetic domain of an electrical steel sheet and a method of refining a magnetic domain of an electrical steel sheet. The apparatus for refining a magnetic domain of an electrical steel sheet includes: a laser beam emission unit; a toroidal mirror for converting the la...

Disclosed herein is a Nb-Ti composite IF steel in which fine precipitates, such as CuS precipitates, having a size of 0.2 µm or less are distributed. The distribution of fine precipitates in the Nb-Ti composite IF steel enhances the yield strength and lowers the in-plane anisotropy index. The nanometer-sized precipi...

In an ironmaking system using non-cooking coal and fine iron or directly in urnace operations without any additional treatment, a byproduct sludge recycling apparatus powders wet byproduct sludge which is by-produced in water treatment of discharge gas and then re-blows sludge powder into fluidized-bed reduction r...

The invention provides a wire guider of air guide type. The wire guider of air guide type guides a wire which is run in a predetermined direction. The wire guider of air guide type includes a guiding unit having an inner path extending along the running direction of the wire to guide the running of the wire and an a...

There are provided a high-workability high strength steel sheet with excellent workability due to the high elongation and excellent crashworthiness due to the high yield strength, and a method for manufacturing of it. The high manganese steel sheet includes, by weight: carbon (C): 0.2 to 1.5%, manganese (Mn): 10 to ...

The present invention relates to an apparatus for restoring fine ore and an apparatus for manufacturing molten iron including the same. An apparatus for restoring fine iron includes a fine iron storage bin, and a cyclone that collects fine iron in an offgas that is supplied from the fine iron storage bin. ...

The present invention relates to an apparatus for pressing cheek plates and an apparatus for manufacturing compacted iron including the same. The apparatus for pressing cheek plates includes i) a bar that is configured to press a cheek plate installed at one end of a gap formed between a pair of rolls that compre...

One embodiment of the present invention relates to a molten iron manufacturing apparatus. The molten iron manufacturing apparatus produces molten iron and generates by-product gas. The molten iron manufacturing apparatus comprises: a coke furnace wherein coke is produced and COG is generated; a gas mixing device whi...

The present invention relates to a descaling apparatus for effectively removing scales formed on surfaces of hot rolled steel strips (steel sheets). An embodiment of the descaling apparatus of the present invention comprises: a housing arranged on a hot rolled steel strip transfer path; high pressure fluid supply me...

The present invention relates to a melter-gasifier uniformly distributing charging materials and an apparatus for manufacturing molten irons provided with the same. In an embodiment, charging materials are charged into a melter-gasifier manufacturing molten irons. The melter-gasifier includes i) a charging passage t...

The present invention relates to high carbon hot rolled steel sheet of a type with which post processing is truncated and which can give satisfactory final product quality despite partial truncation of the processing which follows hot rolling. The present invention also relates to a production method for the high ca...

The present invention relates to an apparatus and method for manufacturing molten iron. The method for manufac- turing molted iron includes producing a mixture containing iron by drying and mixing iron-containing ore and additives; passing the mixtures containing iron through one or more successively-connected flu...

Disclosed herein are a coal briquette for a smelting reduction process in which coal and iron ore are charged in to a smelting furnace to produce a molten iron, and a method for manufacturing the coal briquette. The coal briquette comprises 50% by weight or less of at least one of sludge and dust and the balance of ...

The object of the present invention is to provide a method for manufacturing a hot rolled steel sheet having confirmed anti-aging properties for restraining processing defects, such as fluting, along with workability and paintability resulting from the optimization of steel components, manufacturing processes, shot ...

The present invention relates to a method for manufacturing a grain oriented electric steel sheet. In the method for manufacturing the grain oriented electric steel sheet a grain oriented electric steel sheet slab is heated and hot rolled and then a hot band annealing process is performed or omitted and also a cold ...

The present invention relates to product molding method and apparatus and a product. A product molding apparatus comprises: a lower mold which has one or more molding grooves formed thereon and on which a material is mounted; an upper mold which is disposed above the lower mold and is for applying pressure to the ma...

A cold rolled steel sheet, and a method of manufacturing the same, designed to have aging resistance and excellent formability suitable for use in automobile bodies, electronic appliances, and the like. The cold rolled steel sheet comprises 0.003 % or less of C, 0.003 - 0.03 % of S, 0.01 ~ 0.1 % of Al, 0.02 % or les...

The present invention relates to a particle generating apparatus capable of generating uniform particles using a small amount of heat and a coating system including the same and the particle generating apparatus comprises: a container for storing a coating solution; and a heating means which is immersed in the coati...

One embodiment of the present invention provides an endless rolling apparatus and method which have improved cooling conditions for producing advanced high strength steel and the endless rolling apparatus according to one aspect of the present invention comprises: a continuous casting machine for casting a slab; and...

The present invention relates to a grain-oriented electrical steel sheet and a method for manufacturing the same. The present invention can provide a grain-oriented electrical steel sheet and a method for manufacturing the same the grain-oriented electrical steel sheet comprising: 2.0 wt% to 5.0 wt% of Si; 0.005 wt%...

Provided is a method for manufacturing molten iron wherein an iron-containing by-product is blown into a melting gasification furnace through a tuyere. A method for manufacturing molten iron comprises: i) a step for providing an iron-containing by-product that includes a slurry; ii) a step for introducing a lump car...

Provided is a method for magnetic domain refinement of an oriented electrical steel plate the method comprising: a meandering control step for making a steel plate be moved along the center of a production line without meandering to the left or right; a steel plate support roll position control step for controlling ...

Disclosed herein are a bake-hardenable high-strength cold-rolled steel sheet, a hot-dipped steel sheet thereof, and a method for manufacturing the same. The steel sheet comprises 0.0016-0.01 % of C; O.I % or less of Si; 0.2-1.5 % of Mn; 0.05-0.15 % of P; 0.01 % or less of S; 0.08-0.5 % of (soluble) Al; 0.0025% or le...

A mandrel of a coil box, according to the present invention , comprises: a cylindrical mandrel body having a center shaft disposed therein and a slot into which a front end portion of a hot bar is inserted; and a guide part which is arranged towards the inside of the mandrel body from a peripheral wall of one side o...

The present invention relates to an apparatus (100) and method for manufacturing molten iron to supply oxygen and water directly to a fluidized-bed reactors (24, 25, 26) to increase a temperature of a reaction gas and prevent molten fine ores from adhering to the fluidized-bed reactors (24, 25, 26) thereby improving...

Disclosed is a system for controlling a flow rate of cooling water in continuous casting. The system includes a main pipe having a main valve installed thereto, a sub-pipe branching from the main pipe and having a sub-valve installed thereto, and a controller serving to compare a minimum flow rate of the coolin...

Disclosed is an insulation coating composition for a non aromatic electrical sheet. The insulation coating composition for the non aromatic electrical sheet according to the present invention comprises: a mixed metal phosphate comprising aluminum phosphate (Al(HPO)) and cobalt phosphate (Co(HPO)); an epoxy resin; ...

Disclosed is a coating solution for a non-oriented electrical steel sheet, including 20-40 wt% of barium sulfate (Ba2SO4), 10-20 wt% of titanium oxide (TiO2), 15-30 wt% of ionized water, and 30-50 wt% of melamine -based resin containing ethylene glycol and glycerin as high boiling po...

The present invention relates to a cooling apparatus and segment for a continuous casting machine provided with the same, wherein the cooling apparatus comprises: a driving means for supplying rotational force; cooling water spraying units respectively provided at both sides of the driving means and having at least ...

According to one aspect of the present invention provided is an integrated steel manufacturing system comprising: a reduced fine iron ore manufacturing device comprising a first fluidized furnace equipment and a second fluidized furnace equipment that each include at least one fluidized furnace for reducing fine iro...

A laser welding method for hot rolled steel sheets in a continuous production process for coils. Two hot-rolled steel shoots subject to low-temperature transformation are butted against each other. Butted portions of the hot-rolled steel sheets are laser-welded with a welding material containing up to lwt% C and 0 t...

Provided are a coal briquette manufacturing method which separately crushes coals by coal type so as to achieve excellent cold strength and hot strength and a coal briquette manufacturing apparatus. The coal briquette manufacturing method is applied for insertion into a dome portion of a melting gas furnace so as ...

A tuyere for manufacturing molten iron is provided. The tuyere includes i) an oxygen injection opening that is configured to inject oxygen therethrough, and ii) a sealing gas injection opening that is located to be spaced apart from the oxygen injection opening and is configured to inject a sealing gas surrounding t...

Provided is a method and apparatus for manufacturing ferrochrome. According to the present invention the method for manufacturing ferrochrome comprises the steps of: heating fine chromium ore; pre reducing the heated fine chromium ore; mixing a flux into the fine chromium ore; preparing a compacted body after mixing...

The purpose of the present invention is to provide a high silicon steel sheet having excellent productivity and magnetic properties and a method for manufacturing the same.

A bi-iquette manufacturing apparatus which properly compresses direct reduced iron at a central portion of a roll, and includes: a loading hopper which supplies direct reduced iron; a feeding box which is connected to a lower end of 5 the loading hopper; a pair of rolls which are coupled to a lower end of the fee...

The present invention relates to a method of manufacturing molten iron using an improved charging method, and an apparatus for manufacturing molten iron using the same. The method of manufacturing molten iron according to the present invention includes: preparing iron-containing materials; converting the iron-contai...

THE PRESENT INVENTION PROVIDES A SEGMENT WHICH MAY PREVENT THE SURFACE OF A STRIP FROM PERIODICALLY SWELLING UP BETWEEN A ROLLER AND A NEIGHBORING ROLLER DUE TO PRESSURE EVEN THOUGH STRIPS OF HIGH TEMPERATURE ARE CONTINUOUSLY CASTED AT HIGH SPEEDS THE SEGMENT INCLUDING: A FIXED FRAME AND A LOOSED FRAME WHICH ARE DIS...

A laser welding method for hot-rolled steel sheets in a continuous production process for coils, and an apparatus therefor. Two hot-rolled steel sheets subject to low-temperature transformation are butted against each other. Butted portions of the hot-rolled steel sheets are laser-welded to form a weld. The weld of ...

Disclosed is an apparatus for producing a composite gas including carbon monoxide and hydrogen. The apparatus for producing the composite gas including carbon monoxide and hydrogen according to the present invention comprises: a first preprocessing device for an ironworks byproduct gas containing methane; a second p...

Provided is a method for manufacturing briquette which is charged and quickly heated in a dome unit of a melting gasifier in a molten iron manufacturing apparatus including the melting gasifier in which reduced iron is charged, and a reducing furnace which is connected to the melting gasifier and which provides th...

[Formula] Ceq = C + Si/24 + Mn/6 + Ni/40 + Cr/5 + V/14 where C, Si, Mn, Ni, Cr and V indicate the contents (wt%) of the respective elements.

The present invention relates to an integrated steelmaking system and an integrated steelmaking method and more specifically to an eco friendly integrated steelmaking system and an eco friendly integrated steelmaking method which can remarkably reduce the amount of environmental contaminants generated in a raw mate...

Provided are coal briquettes having superior heat strength and a method for manufacturing same. The method for manufacturing the coal briquettes comprises the steps of: i) providing powdered coal; ii) providing graphite for restraining the degradation of the coal briquettes at a high temperature; iii) providing a cu...

A grain-oriented electrical steel sheet and a method for manufacturing the same are disclosed. The method for manufacturing a grain orientated electrical steel sheet according to an embodiment of the present invention comprises the steps of: providing an electrical steel sheet before or after forming a primary recry...

Provided are hot press formed (HPF) parts having excellent bending properties and a method for manufacturing same. The present invention relates to an HPF part having excellent bending properties the HPF part having a hot dip aluminum plated layer formed on a surface of a base steel sheet wherein the base steel shee...

The present invention relates to a pre coating agent composition for grain oriented electrical steel sheets a grain oriented electrical steel sheet comprising the same and a manufacturing method therefor. The present invention provides a pre coating agent composition for grain oriented electrical steel sheets compri...

The present invention relates to a plated steel sheet-precooling device, a plated steel sheet-postcooling device, and a plating equipment including the same, the plated steel sheet-precooling device functioning to increase a cooling rate of a plating solution-coated steel sheet to improve the quality of the plated s...

One embodiment of the present invention comprises: an electrical steel sheet material; and an insulating coating which is on one or both sides of the electrical steel sheet material, wherein the insulating coating comprises a silane compound and a metal hydroxide.

Disclosed are a high strength steel sheet and a manufacturing method thereof, the steel sheet comprising, percentage by weight: C: 0.001 to 0.004%; Si: 0.5% or less (excluding 0%); Mn: 1.2% or less (excluding 0%); P: 0.005 to 0.12%; S: 0.01% or less; N: 0.01% or less; acid soluble Al: 0.1% or less (excluding 0%); Ti...

An austenitic stainless steel having improved strength is disclosed. The disclosed austenitic stainless steel comprises, by wt%, 0.02-0.14% of C, 0.2-0.6% of Si, S in an amount less than 0.01%, 2.0-4.5% of Mn, 2.5-5.0% of Ni, 19.0-22.0% of Cr, 1.0-3.0% of Cu, Mo in an amount less than 1.0%, 0.25-0.40% of N, and the ...

A plated steel plate first cooling device according to an embodiment of the present invention comprises: a cooling water spraying unit for spraying cooling water to a plated steel plate; and an electrifying unit arranged on at least one side of the cooling water spraying unit so as to electrify the cooling water. Th...

The present invention relates to mold flux used in slab casting, comprising, with respect to the total weight%, 32 wt% to 38 wt% of aluminum oxide (Al2O3), 8 wt% to 12 wt% of strontium oxide (SrO), 8 wt% to 12 wt% of potassium oxide (K2O), 8 wt% to 12 wt% of fluorine (F), 5 wt% to 8 wt% of boron oxide (B2O3), 3 wt% ...

The present invention relates to a molten iron manufacturing apparatus and a molten iron manufacturing method and can provide a molten iron manufacturing apparatus and a molten iron manufacturing method the apparatus comprising: a melt gasification furnace for manufacturing molten iron by allowing reduced iron and a...

Proposed in the present invention are a refinement apparatus and a refinement method, the refinement apparatus comprising: a container unit having an open upper portion and a space for refining melt formed therein; a nozzle unit which is formed so as to blow gas and is installed in the container unit; a camera unit,...

A method for casting slabs, according to the present invention, comprises the steps of: respectively positioning, at the upper part of a tundish and the outside of the tundish, ladles having molten steel accommodated therein; carrying out casting by supplying, to the tundish, the molten steel of the ladle arranged a...

A nozzle, according to the present invention, comprises: a body unit having a passage through which molten steel can pass, and having, on a lower end thereof, a discharge port from which the molten steel is discharged to the outside; and a flow control unit mounted in the body unit so as to be extensively formed in ...

The present invention relates to a roller assembly, a casting apparatus having the same and a roller separating method therefor, the roller assembly comprising: a support for rotatably supporting a roller arranged on a movement path of an object to be treated; a fixing shaft mounted at the back side of the support a...

A cold-rolled steel sheet for flux-cored wire according to one embodiment of the present invention comprises, in wt%, 0.005-0.08 % carbon (C), 0.05-0.25% manganese (Mn), 0.05% or lower (excluding 0%) silicon (Si), 0.0005-0.01% phosphorus (P), 0.008% or lower (excluding 0%) sulfur (S), 0.001-0.035% aluminum (Al), 0.0...

The present invention provides a solution composition for surface treatment, an alloying galvanized steel sheet surface-treated with the same, and a method for manufacturing the alloying galvanized steel sheet, the solution composition containing: 10-30 wt% of a trivalent chrome compound comprising chromium phosphat...

The present invention relates to a coating composition for preventing occurrence of black staining and black spots when an Mg-containing galvanized steel sheet is exposed to a high temperature and high humidity environment, and an Mg-containing galvanized steel sheet coated with the same. The present invention provi...

An electrical steel sheet adhesive coating composition according to an embodiment of the present invention contains, relative to 100 wt% of all solids: 20-40 wt% of a resin having an average particle diameter of 10-300 nm; 10-35 wt% of inorganic nanoparticles combined with a resin; 10-30 wt% of a metal phosphate; an...

The present invention relates to a method for producing a coal briquette, and a coal briquette produced by the method, the method comprising the steps of: preparing base materials comprising pulverized coal and dextrin; producing a mixture by mixing the base materials; aging the mixture; and molding the aged mixture...

The method for refining the magnetic domains of a grain-oriented electrical steel sheet according to one embodiment of the present invention comprises the steps of: preparing a grain-oriented electrical steel sheet; and forming grooves by emitting a quasi-continuous laser beam having a duty cycle of 98.0% to 99.9% t...

An embodiment of the present invention provides: an adhesive coating composition capable of attaching (coupling) an electrical steel sheet without using an existing coupling method such as welding clamping or interlocking; an electrical steel sheet laminate employing the same; and a manufacturing method therefor. Th...

The present invention relates to a Zn-Ni electroplated steel sheet having excellent corrosion resistance and formability and a manufacturing method therefor. One embodiment of the present invention provides a Zn-Ni electroplated steel sheet having excellent corrosion resistance and formability and a manufacturing me...

An embodiment of the present invention provides: an adhesive coating composition capable of adhering (coupling) non-oriented electrical steel sheets without using a conventional coupling method such as welding clamping and interlocking; a non-oriented electrical steel sheet laminate to which the same is applied; and...

The hydrogen production equipment according to the present invention produces steam using heat generated during a hydrogen production process, and recycles the steam back into the hydrogen production process. Thus, the steam required for generating hydrogen can be provided by the hydrogen production equipment, there...

The present invention relates particularly to a composite resin composition for steel plates for automotive fuel tanks and particularly for hybrid automotive fuel tanks, a composite resin steel plate for fuel tanks, using the same, and a method for manufacturing the same steel plate.

A grain-oriented electrical steel sheet according to one embodiment of the present invention has a forsterite film formed on one surface or both surfaces of a grain-oriented electrical steel sheet substrate and a ceramic layer formed on the entire or a partial region on the forsterite film. A method for manufacturin...

A plating device is provided in order to enable a simplified process and increase productivity and product quality the plating device comprising: a plating bath for hot-dipping a steel sheet; a wiping part disposed on the rear-end of the plating bath on one surface or both surfaces of the steel sheet along the progr...

Provided are a coal briquette and a method for producing the same the coal briquette being inserted into a dome part of a melting and gasification furnace in a molten iron manufacturing apparatus and is rapidly heated wherein the molten iron manufacturing apparatus comprises a melting and gasification furnace into w...

Provided are: coal briquettes to be rapidly heated by being charged in a dome part of a melting gasification furnace in an apparatus for manufacturing molten iron the apparatus comprising the melting gasification furnace in which reduced iron is to be charged and a reduction furnace connected to the melting gasifica...

Provided are coal briquettes a method and an apparatus for manufacturing the same and a method and an apparatus for manufacturing molten iron. The coal briquettes are inserted into a domed portion of a melting gas brazier of a molten iron manufacturing device and is heated rapidly the molten iron manufacturing devic...

Zn alloy plated steel material having excellent weldability and processed part corrosion resistance and a method for production of Zn alloy plated steel material are provided. In the Zn alloy plated steel material comprising base steel material and a Zn alloy plating layer the Zn alloy plating layer includes by wt% ...

In an exemplary embodiment of the present invention, a manufacturing method of a coal briquette charged to a dome portion of a melter gasifier to be rapidly heated in a molten iron manufacturing device including the melter gasifier charged with reduced iron and a reduction furnace connected to the melter gasifier an...

Provided is a method for producing briquettes in which in an apparatus for producing molten iron comprising a melter gasifier into which reduced iron is fed and a reducing furnace connected to the melter gasifier and supplying the reduced iron the briquettes are fed into the domed part of the melter gasifier and h...

There are provided a plated steel sheet including a plating layer having a crater fraction of 15% or less, a plating amount of 20 g/m2 to 60 g/m2, and an alloying degree of 7% to 15%; a composite resin coated steel sheet manufacturing by forming a coating layer containing a urethane-acrylic dendrimer resin on the pl...

Disclosed are: a wire rod and a steel wire for a high stress suspension spring for a motorcycle, wherein decarbonization and low temperature-structure occurrence are easily suppressed when the wire rod and the steel wire are cooled down; and a manufacturing method therefor. A steel wire for a high strength spring ac...

Disclosed is a ferrite-based steel sheet that has excellent corrosion resistance for an exhaust system while containing a reduced amount of Cr which is an expensive element. The ferrite-based steel sheet having excellent corrosion resistance for an exhaust system according to an embodiment of the present invention c...

The present invention relatesto an apparatus for manufacturing compactedirons and an apparatus f443/kolnp/2006or manufacturingmolten irons using the same The apparatusfor maufacturing compected iron accordingto the present invention includes a charginghopper into which red...

The present invention relates to an apparatus for manufacturing compacted irons and an apparatus for manufacturing molten irons usingthe same. The apparatus for manufacturing compacted irons (100) according to the present invention includes a charging hopper (10) into which reduced materials containing...

Provided is an apparatus for manufacturing molten iron using directly fine or lumpcoals and fine iron-containing ores, a method thereof, an integrated steel mill usingthe same, and a method thereof. The method of manufacturing the molten ironcomprises the steps of : manufacturing iron-conta...

The present invention relates to method for manufacturing coal briquettes directly using coals with wide range of grain size, and the method and the apparatus for manufacturing molten irons using the same. For this, the method for manufacturing coal briquettes of the present invention comprises a step of per...

APPARATUS FOR MANUFACTURING MOLTEN IRON ANDMETHOD FOR MANUFACTURING THE SAMEThe present invention relates to an apparatus for manufacturing moltenirons and a method for manufacturing the same. The method for manufacturingmolten irons according to the present invention includes steps o...

The present invention relates to an apparatus for manufacturing compacted irons of the reduced materials containing fine reduce irons and anapparatus for manufacturing molten irons provided with the same. The apparatus for manufacturing compacted irons (100) according to the present invention includes ...

The present invention relates to a device for centrifugal combustion by area using a flow of combustion air and the device comprises: an upper combustion chamber which supplies combustion air to the inside of the combustion chamber and which discharges through the combustion air a pillar of flames that have complete...

The molten iron manufacturing apparatus according to one aspect of the present invention comprises: an iron ore reducing furnace for charging iron ore and introducing a reducing gas so as to produce reduced iron; a melting/gasifying furnace for filling coal and charging the reduced iron which is discharged after bei...

2234The present invention relates to a composition for a non oriented electrical steel sheet a method of manufacturing a non oriented electrical steel sheet product and a non oriented electrical steel sheet product. The present invention can provide a composition for a non oriented electrical steel sheet the composi...

There are provided a steel sheet for resistance to composite corrosion from sulfuric acid and hydrochloric acid having excellent wear resistance and surface quality and a method of manufacturing the same. The steel sheet having excellent surface qualities may be provided by improving resistance to erosion occurring ...

A hot rolling device according to one embodiment of the present invention may comprise: a cast part supply portion for producing a cast part; a hot roller which is linked to the cast part supply portion for receiving and hot rolling the cast part; and a heating unit which is arranged between the cast part suppl...

A continuous casting and rolling apparatus according to one embodiment of the present invention provides: a continuous caster for generating a steel sheet; a first rolling unit associated with the continuous caster; and a second rolling unit which is spaced apart in the outlet of the first rolling unit and comprises...

The present invention provides: a steel sheet capable of manufacturing a formed product having superior bendability and ultra high strength when compared with conventional steel sheets for manufacturing a hot press formed product; the formed product having superior bendability and ultra high strength by using the sa...

Provided are an hot press formed (HPF) article having excellent delamination resistance and a method for manufacturing same. The present invention relates to an HPF article which has a melted aluminum plating layer formed on the surface of a base steel sheet and has excellent delamination resistance wherein the base...

A powder sediment removal unit and a powder sediment removal robot having the same are disclosed. The powder sediment removal unit comprises: a rotary bucket including a plurality of sediment inlets opened in rotation direction at the periphery thereof and a plurality of curved surface guides for guiding sediment en...

A sintering machine according to one embodiment of the present invention can comprise: a conveyor part positioned between a hopper part for supplying raw materials to be sintered and an ore discharging part through which the raw materials to be sintered are sintered and discharged and cyclically moving sintering tro...

A high hardness martensitic stainless steel with excellent antibacterial property and a preparation method therefor are disclosed. The disclosed high hardness martensitic stainless steel with excellent antibacterial property comprises: 0.45 0.65 wt% of C; 0.02 0.06 wt% of N; 0.1 0.6 wt% of Si; 0.3 1.0 wt% of Mn; 0.1...

The present invention relates to a continuous slab casting method for controlling positions of segregation and a shrinkage cavity generated in a slab and a continuous slab casting method according to one embodiment of the present invention comprises the steps of: primarily cooling ingot steel by a mold while injecti...

The present invention relates to: an insulating coating composition for an oriented electrical steel sheet; an oriented electrical steel sheet having an insulating coating formed on the surface thereof by using the same; and a preparation method therefor and specifically can provide an insulating coating composition...

The present invention relates to an endless rolling apparatus and a method for controlling the same which are capable of preventing the occurrence of loops in a steel plate the endless rolling apparatus comprising: a casting equipment for producing a steel plate; a rolling equipment arranged on the rear part of the ...

A composite molten iron manufacturing apparatus is provided. According to the present invention in a molten iron manufacturing apparatus based on a fluidized reduction furnace and a coal filling type gasification melting furnace and a molten iron manufacturing apparatus based on a molten bath type smelting reduction...

The present invention provides a device for removing the top dross of a plating pot the device comprising: an air supply unit; and an air spraying unit which is linked to the air supply unit while being disposed above the melt surface of the plating pot and which comprises a plurality of spray nozzles and the invent...

Provided is a cheek plate of a reduced iron agglomeration apparatus for reinforcing adhesive strength on both side surfaces of a roller and effectively discharging the gas generated when reduced iron is processed the cheek plate comprising: fan shaped cover parts respectively provided on both side surfaces of the pa...

Provided is a raw material charging device for a melting furnace including a rotating chute rotatably provided at the lower end of a feeding pipe through which raw materials are fed so as to control the feed distribution of the raw materials thereby sending materials under a condition in which the length of the rota...

An apparatus for processing a terminating operation of a continuous casting machine, according to one embodiment of the present invention, comprises: a weight detecting unit for detecting the weight of molten steel in a tundish; a mold for receiving the molten steel discharged from the tundish; a thermocouple for me...

The present invention relates to a steel sheet for a tool and a manufacturing method therefor. One embodiment of the present invention provides a steel sheet for a tool comprising with respect to 100 wt% of the entire steel sheet 0.4 to 0.6 wt% of C; 0.05 to 0.5 wt% of Si; 0.1 to 1.5 wt% of Mn; 0.05 to 0.5 wt% of V;...

A method for manufacturing a grain-oriented electrical steel sheet according to one embodiment of the present invention comprises the steps of: manufacturing a steel slab comprising at least one of 2-7 wt% of Si 0.03-0.10 wt% of Sn and 0.01-0.05 wt% of Sb; manufacturing a hot-rolled sheet by hot-rolling the steel sl...

A grain-oriented electrical steel sheet according to an embodiment of the present invention comprises: a forsterite layer formed on the surface of an electrical steel sheet; a groove which is formed on the forsterite layer in a direction perpendicular to a rolling direction; and a forsterite calcination layer which ...

The present invention relates to an alloy-coated steel sheet and a manufacturing method therefor and can provide an alloy-coated steel sheet and a manufacturing method therefor the alloy-coated steel sheet comprising: a steel sheet; and an Al-Mg-Si alloy layer located on the steel sheet wherein the Al-Mg-Si alloy la...

Provided is a method for refining the magnetic domains of grain-oriented electrical steel plates so as to optimize equipment and processes and thereby increase magnetic domain refinement efficiency improve workability and increase processing capacity the method comprising: a steel plate supporting roll position cont...

Disclosed is a cyclone comprising: a main body part collecting dust from gas introduced thereinto and guiding the collected dust downwards; a first grid part having a planar shape and located in the lower portion of the main body part the first grid part having a plurality of first openings formed therethrough; and ...

Provided is a roll stamping apparatus according to one embodiment of the present invention the apparatus comprising: a plurality of roller sets each having rollers rotating while facing each other in order to press opposite surfaces of a continuously supplied material and to allow the material to proceed therebetwee...

Provided is a method for refining the magnetic domains of grain-oriented electrical steel plates so as to optimize equipment and processes and thereby increase magnetic domain refinement efficiency improve workability and increase processing capacity the method comprising: a steel plate supporting roll position cont...

The present invention provides a composite resin composition comprising 30 to 60% by weight of a urethane-modified polyester resin in which a linear type and a crosslinking type are mixed 3 to 15% by weight of at least one curing agent from among an aziridine curing agent and a melamine curing agent 0.05 to 1.5% by ...

An embodiment of the present invention provides an iron content removing device used to effectively remove iron content included in rolling oil and a regenerating system comprising the same. An iron content removing device according to an aspect of the present invention comprises: a driving portion having a driving ...

The present invention relates to a composition for surface-treating a plated steel sheet a steel sheet surface-treated by using the same and a surface treatment method using the same. Specifically the composition for surface treatment comprises on the basis of the total weight (100 wt%) metal nanoparticles in an amo...

In order to improve the supply flow of the raw materials and to prevent the clogging due to the adherence or aggregation of the raw materials in the supplying apparatus, the present invention provides a raw materials supplying apparatus of a facility for manufacturing coal briquettes installed between a mixer for mi...

The present invention provides a melt treating apparatus and a melt treating method applied thereto the apparatus comprising: a container having a melt injection part arranged at an upper portion thereof and a hole formed through a bottom portion thereof; an induction member installed to be spaced from the melt inje...

The present invention relates to a vehicle part having high strength and excellent durability and a manufacturing method therefor. According to one aspect of the present invention the vehicle part comprises by a weight ratio a composition comprising 0.20-0.50% of C 0.5% or less of Si 1.0-2.0% of Mn 0.01-0.1% of Al 0...

The present invention relates to a device for injecting a molten material casting equipment using the same and a casting method which comprises the steps of: preparing a main mold flux; injecting molten steel into a mold; preparing a molten mold flux by melting the main mold flux and injecting the molten mold flux i...

The present invention relates to a composition for washing a pickled steel plate a method for washing a pickled steel plate by using the same and a steel plate obtained thereby and more specifically to a composition for washing a pickled steel plate comprising a phosphoric acid ester compound an amine-based compound...

By optimizing equipment and processing magnetic domain refinement efficiency can be increased workability can be improved and processing ability can be increased through same. Provided is a method for magnetic domain refinement of an oriented electrical steel plate the method comprising: a steel plate supporting rol...

An apparatus for controlling the concentration of oxygen in a heating furnace according to one embodiment of the present invention may comprise: a first oxygen concentration bias setting unit for receiving a set first oxygen concentration bias; a second oxygen concentration bias calculation unit for, when a measured...

The present invention relates to a distillation apparatus for fractionating impurities from a raw material by a fractional distillation method using a boiling point difference to modify the raw material, the distillation apparatus comprising: a reactor having an internal space capable of heat treating the injected r...

A blast furnace tap hole temperature measurement device according to an embodiment of the present invention may comprise: a temperature measurement unit for measuring a temperature value of a blast furnace tap hole; a ratio measurement unit for measuring a ratio between molten iron and slag at the blast furnace tap ...

One aspect of the present invention relates to a cold rolled steel sheet for a flux cored wire comprising by wt% 0.01-0.15% of C 0.1-0.5% of Mn 0.05% or less of Si (excluding 0%) 0.0005-0.01% of P 0.008% or less of S (excluding 0%) 0.005-0.06% of Al 0.0005-0.003% of N 0.5-2.0% of Ni and the balance of Fe and inevita...

The present invention relates to a facility for manufacturing sintered ores, comprising: a sintering truck movable along a movement path; a plurality of windboxes arranged along the movement path at the lower part of the sintering truck; a hood formed to be extended along at least a part of the movement path at the ...

Provided is a method for refining a magnetic domain of a grain-oriented electrical steel plate the method comprising: a steel plate support roll position adjustment step of controlling a vertical position of a steel plate which is being transferred along a production line while supporting the steel plate to precisel...

An aspect of the present invention relates to a high strength steel sheet having an excellent high-temperature elongation characteristic, wherein the sheet comprises, by weight %, 0.4-0.9% of C, 0.01-1.5% of Cr, 0.03% or less (exclusive of 0%) of P, 0.01% or less (exclusive of 0%) of S, 0.01% or less (exclusive of 0...

The present invention provides an exhaust gas processing apparatus and an exhaust gas processing method applied thereto the apparatus comprising: a suction unit extending from a lower portion of a bogie along a traveling direction of the bogie and having a circulation region and an exhaust region that are separated ...

The present invention provides a metal material cooling apparatus comprising: a spray cooling part for spraying a cooling medium to the surface of the metal material; and a spray angle adjusting part connected to the spray cooling part, and adjusting the spray angle of the cooling medium sprayed from the spray cooli...

Provided is a method for manufacturing molten iron in which a raw material and a reducing agent are charged into a melter-gasifier and oxygen is blown to manufacture molten iron and a reducing gas is supplied to a reducing furnace to reduce iron ore so as to stabilize the flow of molten material and the reducing gas...

Disclosed are: a ferrite-based stainless steel having excellent strength and acid resistance; and a method for manufacturing the same. The ferrite-based stainless steel according to an embodiment of the present invention comprises, in terms of weight%, 0.1-0.2% of carbon (C), 0.005-0.05% of nitrogen (N), 0.01-0.5% o...

A molten iron manufacturing facility, according to the present invention, comprises: a fluidized reduction furnace which manufactures reduced iron by reducing iron ore fines; a melter gasifier which receives the reduced iron from the fluidized reduction furnace and manufactures molten iron by drawing oxygen into the...

A grain-oriented electrical steel sheet of an embodiment of the present invention comprises Si: 1.0 % to 7.0 % and Y: 0.005 % to 0.5 % by wt%, and the remainder comprising Fe and other inevitable impurities, and 10 pieces or less of inclusions comprising Y and having a diameter of 30 nm to 5 ;m per area of 1 mm2. ...

The present invention relates to a cold-rolled steel sheet having high temperature characteristics and room temperature formability, and a manufacturing method therefor, and provides a cold-rolled steel sheet having excellent formability, and a manufacturing method therefor, the cold-rolled steel sheet: comprising, ...

Provided are an annealing separator composition for an oriented electrical steel sheet an oriented electrical steel sheet and a method for manufacturing the oriented electrical steel sheet. The annealing separator composition for an oriented electrical steel sheet according to one embodiment of the present invention...

Provided are an annealing separator composition for an oriented electrical steel sheet an oriented electrical steel sheet and a method for manufacturing the oriented electrical steel sheet. The annealing separator composition for an oriented electrical steel sheet according to one embodiment of the present invention...

Disclosed are an automotive exhaust system ferritic stainless steel having improved heat resistance and condensed water corrosion resistance, and a manufacturing method therefor. According to one embodiment of the present invention, the ferritic stainless steel comprising: a stainless steel base metal comprising, by...

One aspect of the present invention relates to a hot rolled steel sheet having excellent formability and fatigue properties comprising in percentage by weight: 0.3-0.8% of C; 13-25% of Mn; 0.1-1.0% of V; 0.005-2.0% of Si; 0.01-2.5% of Al; 0.03% or less of P; 0.03% or less of S; 0.04% or less (excluding 0%) of N; and...

According to one embodiment of the present invention a non-oriented electrical steel sheet comprises by wt% 2.0-3.5% of Si 0.3-2.5% of A1 0.3-2.5% of Mn 0.0005-0.03% of Ga and/or Ge individually or as the sum thereof and the balance of Fe and inevitable impurities and satisfies the following formula 1. [Formula 1] ...

A non-oriented electrical steel sheet according to one embodiment of the present invention comprises by wt% 2.0 to 3.5% of Si 0.3 to 3.5% of Al 0.2 to 4.5% of Mn 0.0005 to 0.02% of Zn and the balance of Fe and other inevitable impurities.

The purpose of one aspect of the present invention is to provide: a cold rolled steel sheet for a flux-cored wire, having excellent low temperature toughness, welding workability and processability; and a manufacturing method therefor. One embodiment of the present invention provides: a cold rolled steel sheet for a...

Provided is a method for producing a high-strength, low-toughness cold-rolled steel sheet having excellent fracture properties. A cold-rolled steel sheet according to the present invention contains, in wt%, 0.30-0.70% of C, 0.2-1.0% of Mn, 0.005-0.5% of Si, 0.005-0.02% of P, no more than 0.01% of S, 0.01-0.1% of Al,...

Disclosed are: a ferritic stainless steel capable of inhibiting high-temperature oxidation through effective oxide scale generation; and a manufacturing method therefor. A ferritic stainless steel having excellent high-temperature oxidation resistance, according to one embodiment of the present invention, comprises,...

The present invention relates to a plated steel material which can be used for an automobile, a household appliance, a building material, and the like and, more specifically, to a zinc alloy plated steel material having excellent corrosion resistance after being processed and a method for manufacturing the same. ...

Disclosed is ferritic stainless steel having improved pipe-expanding workability for an automotive exhaust system component. Ferritic stainless steel according to one embodiment of the present invention, comprises in percentage by weight : 10 to 25% of Cr; 0.015% or less of N (excluding 0); 0.005 to 0.04% of Al; 0.1...