A method and a device for releasing a tube during a rolling process in a three roll rolling stand in case of an emergency. The roll holder cartridge (3) has a longitudinal open slot (10) at the yoke support of the vertical axis roll so as to remove the roll holder cartridge according to a direction coinciding with t...

A handling machine for handling rails, arranged in line immediately down stream of a rolling plant, which allows an optimal clamping of the rail along its longitudinal extension, thus effectively with standing the deflection and its variations, while allowing a longitudinal movement of the rail caused by thermal shr...

TILTING CONVERTER" ABSTRACT A tilting converter comprising a container (2), defining a first longitudinal axis X, having a bottom (2"); a support ring (3), coaxial to the container (2) and distanced from said container, provided with two diametrically opposite supporting pins (6), defining a second axis Y orthogona...

The device has a gas flow levelling pipe (3) which defines a continuous curved development surface (Z) comprising a collector (4) to which a nozzle (10) is fixed a delivery manifold (1) in order to introduce pressurized gas into the pre chamber (2) through the holes (12) a first holed partition (5) and a second hole...

Crystallizer for continuous casting comprising a tubular body (11) having at least one wall (12) which defines a through longitudinal casting cavity (13) and a plurality of longitudinal grooves (14) made at least on one part of the wall (12) and open toward the outside thereof. A covering binding (15) is associated ...

The elastic junction for the dynamic connection between the motor side and the head of a sliding block adapter, or between adapter and rolls of a rolling plant, comprises a central pin (5) arranged perpendicular to the longitudinal axis of the adapter (3), multiple sliding blocks (4) connected by means of the pin (5...

A longitudinal, multi-stand rolling mill of the continuous, restrained type for rolling hollow bodies is described, which comprises a main rolling mill (2) and an extracting rolling mill (4) in line and downstream of the main rolling mill, at a distance from the main rolling mill larger than the maximum length of th...

A rolling stand for tubes or rounds comprising two or more rolls (10 20 30) defining a rolling section of the rolling stand that is coaxial to a rolling axis Y of the same stand each roll having a respective rolling surface (S1 ) defining a respective straight line of symmetry (B) passing through the rolling axis an...

The present invention relates to a multi-stand rolling mill (1 ) for tubular bodies. The rolling mill comprises a first section (10) for rolling on mandrel defined by a first plurality of rolling stands (15" 15 15") arranged in sequence along a rolling axis (100). According to the invention the rolling mill also com...

The present invention relates to a process for controlling the distribution of liquid metal flows of in a crystallizer for the continuous casting of thin slabs. In particular, the process applies to a crystallizer comprising perimetral walls which define a containment volume for a liquid metal bath insertable throug...

A roll holder cartridge for a three tube rolling stand with means adapted to release a tube during rolling in case of emergency. The roll holder cartridge (3) has on both side walls a substantially Y shaped opening (10) laying with the foot at the vertical axis yoke support so as to be able to pull out the roll hold...

The active vibration damping system of a rolling mill comprises a rolling stand and an adjustment system for the bending of the rolling rolls (1 1 ) having hydraulic actuators (2\ 2" 2" 2iv) acting on the chock (20) of the rolling rolls (1 1 ) and hydraulic feeding circuits (7 9 11 12) and injectors (8 8" ...

Process for the in-line thermal treatment of rolled rails which ensures to obtain a fine peralitic structure which is uniform through a whole predetermined superficial thickness of the rail head. There is also disclosed a new device for the thermal treatment of rails in-line with a rolling system which, as compared ...

There is described multi-stand rolling mill with stands having four motorized rolls and provided with controls outside the stand and retractile spindles, which comprises a central body with said stands; a first platform (41) on a side charge position carrying the substitution stands; a second platform (42) on a side...

A method for classifying metal tubes in which the measuring of the eccentricity over the entire length of the tube is provided, and in which the classification occurs on the basis of the length of the tube portions which have eccentricity either higher or lower than one or more eccentricity thresholds. ...

A tube rolling plant (R) with multi stand rolling mill having two or more rollers for implementing a mandrel rolling process with controlled speed has a mandrel (31) which is inserted into the hollow body (39) from the frontal opening thereof by passing it first through the rolling mill (5). An opposite movement (L3...

An electromagnetic device (1 ) for stabilizing and minimizing the deformation of a strip (4) made of ferromagnetic material during its feeding in a system for coating the same strip with molten metal by applying a distribution of force which is continuous in the direction transversal to the strip regardless of the w...

An adjustment system for adjusting the position of at least one sliding block (26) of a movable crosspiece of a press with respect to the respective column (23) of the press on which said sliding block may slide comprising a first wedge (10 ) integral with said movable crosspiece; a second wedge (10) sliding on said...

A rolling plant (R) for rolling tubes having a multi stand rolling mill (5) with two or more rolls in order to implement a controlled speed mandrel rolling process comprises a hooking and releasing device (61) which is arranged in the inlet area of the rolling mill (5) to cooperate with the rear tang of the mandrel ...

An apparatus (1) for cooling a bar (10) comprising:  an outer casing (3)  a passageway (2) defining a crossing direction (X) for the bar (10)  at least one drum (4) comprising a plurality of cooling lines (6) each having at least one respective through cavity (9) parallel to the crossing direction (X) and a respecti...

Oscillating table for blooms or billets production plants, comprising pairs of bars, lying on at least one horizontal plane, which constitute the elastic support elements of the crystalliser, thus permitting an optimal guidance of the oscillation thereof exclusively in the casting direction, said pairs of bars const...

Crystalliser holding device for billets, blooms and slabs production plants that has a high constructive simplicity, a significantly reduced overall weight and that reduces substantially to zero the need for maintenance. The crystalliser holding device of the invention, in addition to efficaciously guaranteeing the ...

Abstract SAND FILTERING DEVICE A sand filtering device comprising a single layer filtering bed, or simply a' filter, which allows to obtain perfectly clean water and a high operative working^i I ■' life at high filtering speeds. Advantageously, an appropriate, experimentally' i '■ obtained correlation between ...

ANNEALING AND PICKLING PROCESS Abstract A continuous annealing and pickling process of flat cold-rolled products, such as stainless steel strips, to obtain a high surface quality product at high production rates and with a low environmental impact. It comprises the following steps; heating, up to a temperature comp...

Abstract PLANT FOR PRODUCING METAL STRIP Plant for the continuous casting of thick slabs, blooms or other similar steel products comprising an ingot mould and a series of containment and guiding rollers placed in the area below the ingot mould on both sides of the cast product, i.e. on the intrados and extrados, r...

ABSTRACT A mandrel holder head with release/fastening device of the mandrel for rolling metallic tubes comprises a mandrel holder (1 ) which accommodates within an internal seat a half collar (2) of externally cylindrical shape through an opening in the side wall. In the internal seat are accommodated both an end p...

A rolling mill stand and related rolling mill for rolling rod-shaped bodies, even large in size, which meets the requirement of stiffness uniformity of the rolling mill stands in the transversal direction, all the hydraulic capsules being firmly fixed to the external structure of the rolling mill and providing for t...

A handling machine for rails, arranged in line and immediately downstream of a rolling plant, which allows both to easily handle the rail for transferring it from the roller table to the thermal treatment zone, and to ensure an optimal gripping of the rail along its longitudinal extension, thus effectively contrasti...

A high speed burner having very low polluting emissions, suitable for the process for heat treatment furnaces of a load in free atmosphere. The burner is capable of creating a compact and lean flame with the peculiarity of keeping the NOx emissions at very low levels at any chamber temperature and at any excess comb...

A self-regenerative combustion system comprising a single burner, capable of operating both during the combustion step and the waste gas aspiration step, and a valve with four ways and three positions, capable of switching the regeneration and the on/off control (oxydizing agent end and waste gas end). The system is...

A guiding unit for slabs comprising at least two rolls (10 10") connected to each other and adapted to rotate along a same axis X; wherein each roll comprises a first tubular element (12) and a second tubular element (5) which is external and coaxial to axis X and to the first tubular element and removable from said...

Rolling mill shear provided with at least one blade having characteristics of toughness and resistance to thermal shock typical of the family of tool steels for hot shearing and at the same time having sufficiently high characteristics of surface hardness and wear resistance typical of tool steels for cold shearing....

A cooling tank for the thermal treatment of a rail head provided with a structure comprising a first volume (2) adapted to be filled with a cooling fluid; a second volume (4) arranged above the first volume and communicating therewith so that the fluid passes from the first to the second volume and the rail head to ...

A system for detecting a level of molten steel for an EAF furnace, preferably with three AC electrodes, comprising three electromagnetic coils capable of detecting an electromagnetic field generated by the passage of electric current in a circuit formed between two of said electrodes and the molten metal bath contai...

A direct reduction plant for a direct reduction of iron ore comprising - a reactor (1) having a reduction area (2); - an inlet duct (3), defining an axis X, for introducing a mixture of reducing gas into the reduction area (2), - a plurality of first injection ducts (4), arranged on the inlet duct (3) radially w...

A pickling and rolling plant for pickling and rolling a metal strip comprising a continuous pickling line; storing means (20 20 ) for storing the pickled strip having a capacity of 1000 3000 metres of strip length; a reversible rolling mill having at least two first stands (19) downstream of said storing means (20);...

Plant for the production of metal products comprising:  a main rolling line (12) configured to roll thin slabs;  a main casting line (11) of thin slabs associated downstream to a heating and/or maintenance furnace (18) to heat and/or maintain the cast thin slabs at a uniform temperature the main casting line (11) be...

Apparatus to guide a metal product the apparatus comprising: - a support body (11); - a plurality of support arms (12) associated with the support body (1 1); - a plurality of guide rolls (13) installed rotating in an idle manner on the support arms (12) and defining between them a roller guide gap (14) for the meta...

A slag door for a melting furnace (11) for the production of steel is suitable to be associated with an aperture (34) provided in a lateral wall (33) of the melting furnace (11) and to cooperate with a slag channel (13) provided inside the melting furnace (11) itself.

Method to obtain a continuous casting apparatus to cast, through the casting cavity (13) of a crystallizer (14) of a mold (11), a cast product (P) with a polygonal cross section.

Method to produce metal strip (N) that comprises the casting of a cast product (P) through a casting machine (11) provided with a crystallizer (15a) to obtain a slab (B), and the hot rolling of the slab (B) in a rolling station (19) to obtain metal strip (N). The casting machine (11), during casting, exerts an actio...

The rolling mill stand comprises a bending device and a shifting device for the rolling rolls (18, 19, 20, 21). The housing (14) supports the upper backing and work rolls (18, 20), and the lower backing and work roll (19, 21) and comprises the lower bending block (7, 7'), the upper bending block (101), the chock of ...

An electromagnetic device (20) for laterally containing a liquid metal, having a first electrical conductivity, at one open side end of a passage defined between two counter-rotating casting rolls, at least the surfaces of which are made of a ferromagnetic material, said device comprising a magnetic yoke (1) made of...

A direct reduction system for a direct reduction of iron ore, comprising a reactor (1) having a reduction area (2) and being adapted to be loaded from above with said iron ore; a treatment and feeding line (11), to process the process gases, thus obtaining a reducing gas mixture, and feed said reducing gas mixture i...

A stabilization apparatus for stabilizing a metal strip rising from a molten metal bath along a theoretical feeding plane (X), comprising : - at least one pair of air knives (1), each being arranged in a mutually specular manner with respect to said plane (X); - at least one pair of electromagnetic stabilizing devic...

A welding machine, preferably of the flash butt welding type, designed to facilitate maintenance of the clamping means (3, 4, 6, 7), e.g. clamps, of the two longitudinal metal products to be welded. Advantageously, a first structure (2), provided with first clamping means (3, 4), and a second structure (5), provided...

Apparatus to control and adjust the drawing action in a rolling mill (11) provided with rolling stands (12a, 12b, 12c) through which a product (13) passes. The apparatus comprises a video monitoring system (14) for acquiring frames (15a, 15b) of the product (13) in at least one position; a processing system (16) tha...

The present invention provides a reduction system and method that can be operated with any proportion of gaseous hydrogen-containing gases and gaseous hydrocarbon-containing gases having the possibility of continuing its operation, ensuring an high process availability and negligible loss of production, when the gas...

A drawing bench (3) of a drawing machine comprising a drawing carriage (31 ) which is translatable along a predetermined direction (X) on a base structure (30); a rack- pinion system adapted to translate the drawing carriage (31 ) along said predetermined direction (X) on the base structure (30); wherein the rack-pi...

The invention concerns a process for detecting water leaks in smelting furnaces (2; 4) or in metal or alloy treatment plants, comprising the following steps: (i) providing at least one smelting furnace (2; 4), or at least one metal or alloy treatment plant provided with a water cooling system (5) and being connected...

The present invention relates to an elastic junction device for the dynamic connection, in a rolling mill, between the motor side and the head of an adapter or between the adapter and one or more rolling rolls. The junction device comprises a central body (10) which can be connected to an end of said flange so that ...

Method to control a secondary cooling apparatus in a machine for continuous casting of metal products (P). The secondary cooling apparatus (12) comprises a plurality of cooling units (17) equipped with nozzles (18), wherein each nozzle (18) is provided with delivery orifices (19) from which a refrigerant fluid (L) i...

Secondary cooling apparatus (12) in a machine (10) for continuous casting of metal products (P), wherein each metal product (P) is cast, contained and guided along an axis of movement (X). The secondary cooling apparatus (12) comprises a plurality of cooling assemblies (G) disposed in sequence one to the other along...

Guide device for rolling long metal products (1 1) comprising at least a pair of guide rolls (12) coplanar with each other and rotatable round axes of rotation (XI X2) inclined with respect to a rolling axis (Z) a support body (13) on which the guide rolls (12) are mounted and configured to keep the guide rolls (...

Method for the continuous casting of a product (P) along a curved casting line (18) provided with a crystallizer (11) having a tubular cavity (12) with a polygonal cross section defined by a determinate number of sides (n). The product (P) exiting from the crystallizer (11) is curved along the casting line (18) by s...

A plant for cleaning rolled metal strips provided with a superficial layer of oxide, the plant comprising unwinding means for unwinding at least one coil of rolled strip and pickling means for pickling said rolled strip; wherein there are provided measuring means for measuring the thickness of the superficial layer ...

Melting method comprising a step of loading solid metal material (M) into an electric furnace (11), a step of generating an electric arc between at least one electrode (13) and the metal material (M), a step of perforating the metal material during which said electrode (13) is moved through said metal material (M), ...

Apparatus for melting metal material comprising a container (11) for metal material, by way of example, but not limited to, metal scrap, DRI, cast iron, supplied in an electric arc-type melting furnace, and a plurality of electrodes (18, 19) to melt the metal material, which can be inserted in said container (11). ...

A continuous casting and rolling plant for the continuous production of steel bars or profiles, the plant comprising in sequence, along a processing line, a continuous casting machine (1) adapted to cast a billet (10); a first cutting device (4); a second cutting device (7); a rolling train (8) adapted to roll the b...

Apparatus to control continuous casting, comprising a mold (11) provided with at least one entrance end (12) through which liquid metal (13) is introduced. Furthermore, according to the present invention, the apparatus to control continuous casting comprises at least one electromagnetic brake (16) associated with th...

A vessel (10) for containing direct reduced iron (DRI), such as a reactor for the production of DRI, a bin or a hopper or other container for storing or feeding DRI to melting furnaces or briquetting machines, comprises at least an upper zone (11), defined by a first lateral wall (13) having a substantially cylindri...

A process of cold rolling an aluminum product, e.g. a strip, which crosses at least one rolling stand (1), wherein a lubricant is applied to the strip close to said at least one rolling stand (1) by means of a plurality of applying means (2), said lubricant comprising an emulsion of oil and water. A related rolling ...

An apparatus for the hot production of strip (N) comprises a casting machine (11) configured to cast a thin slab (TS), a heating device (16) configured to maintain the temperature of and/or heat said thin slab (TS), at least one roughing unit (19) and a finishing unit (20) configured to obtain a strip (N), and where...

Crystallizer for the continuous high-speed casting of a metal product (P), which has a casting cavity (13) defined by walls (14) connected to each other in correspondence with edges (15) and provided with cooling means (16).

A crystallizer for continuous casting comprising a tubular body (11) defining a longitudinal axis and having at least one wall (12) that defines a longitudinal through casting cavity (13), a plurality of longitudinal grooves (14) obtained at least on a portion of an outer surface of said at least one wall (12) and o...

Apparatus (10) for rolling a metal product (P) comprising rolling means (11) having a first roller (16) and a second roller (17), both defining at least two rolling channels (25, 26, 27), and guide means (40) configured to selectively guide the metal product (P) toward one or another of the at least two rolling chan...

Method for the production of flat metal products, in particular coils of strip, in endless and/or semi-endless mode, in which a metal product is continuously fed to a rolling mill consisting overall of at least 4 stands. The rolling stands are, in sequence, roughing stands (18a, 18b, 18c), and finishing stands (21a,...

Apparatus (10) for heating steel products (200), in particular billets, comprising a heating chamber (13), a plane of advance (P) defined inside said heating chamber (13) and feed and extraction means (18, 20) for said steel products.

Torsion guide (10) comprising a support body (11) with which there are associated at least two torsion rollers (12, 13) rotatable around respective parallel rotation axes (T1, T2), distanced with respect to each other at least in a direction of adjustment (B) perpendicular to said rotation axes (T1, T2) and disposed...

The invention relates to a plant and a process for pre-coating (111) and subsequent digital sol-gel inkjet printing (122) on metallic strips, wherein on the dried ink a protective clear coat (124) will then be applied. The core of the invention lies in the fact that printing is of the sol-gel ink type and pre-coatin...

The invention concerns a method and a plant for producing flat rolled products, in order to obtain strips (S) having a multiple crown transverse profile that subsequently have to be divided in a longitudinal direction into strips of a smaller width; the method provides a rolling step carried out in a rolling mill co...

The invention concerns a method and a plant for obtaining strips (S), wherein the plant has at least three casting lines (11, 12, 13) disposed in parallel, of which two are lateral (11, 13) and one is central (12), and at least two rolling lines (14, 15) aligned with two of said at least three lateral casting lines ...

The invention is related to a plant for the classification of scrap according to its chemical composition. The plant contains a shear (10; 110) adapted to cut scrap; downstream of the shear an analyser (28; 128) of the chemical composition of the sheared material; means of transport (20, 26; 109, 126, 140, 142, 144,...

Cooling device suitable to be used in an electric melting furnace (30), or suchlike, in cooperation with the lateral wall of said electric furnace (30) and comprising at least one pair of cooling panels (11a, lib, 12a, 12b) each provided with a plurality of cooling tubes (13, 14, 15, 16); the electric furnace (30) c...

The invention relates to a system for changing the hammers of a shredder (10) comprising a shredder (10) with one or more covers (26a, 26b) and a rotating drum (36) equipped with a plurality of hammers; a lifting system (12) suitable to move said hammers and a control unit (50) which controls both the opening of the...

Apparatus (10) for feeding and preheating a metal charge (S) toward a melting furnace (110) of a melting plant (100), comprising at least one conveyor channel (11) for said metal charge (S), at least one hood (14) disposed above said conveyor channel (11) and scrap detection means (43) able to identify the profile o...

A process for producing metallurgical products, in particular at least of the merchant type, in which there are provided the steps of: a) producing a long casting product (9) by means of a continuous casting machine (21 ); b) rolling said long casting product (9) by means of a rolling mill (30) comprising a pluralit...

A system for monitoring the parameters representative of operating conditions of an oil film bearing, wherein an oil film is arranged between a static component (2) and at least one rotating component (3, 4) defining an axis (X), said at least one rotating component being arranged inside said static component (2), t...

A soft reduction segment (1) of a continuous casting machine, said segment being suitable for carrying out a soft reduction of a slab exiting from said continuous casting machine, the segment comprising - an upper support (2) for supporting upper rollers; - a lower support (3) for supporting lower rollers; - adjustm...

Weighing device for charge material fed into an electric arc furnace, which comprises a plurality of supports each comprising an upper plate, a lower plate and a weighing element in contact with and disposed between said two plates, wherein at least one of said weighing elements is a column load cell, and wherein ea...

A welding machine, preferably of the flash welding type, designed to facilitate maintenance of the clamping means (3, 4, 6, 7), e.g. clamps, of the two longitudinal metal products to be welded. Advantageously, a first structure (2) provided with first clamping means (3, 4) and a second structure (5) provided with se...

An apparatus for the thermal heating of steel products comprises inside it a path for feeding the steel items which extends between an entry end (11) and an exit end (12) of the steel items, means for feeding a fuel, means for feeding a comburent comprising oxygen, and burners able to operate the combustion of the f...

A correction apparatus for correcting the planarity of a metal strip (1 ) advancing into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising - a bridle roll (2), which modifies the feeding direction of the metal strip (1) exiting an annealing furnace (10); - only one...

A drum cutting device (100), e.g., for shears adapted to cut flat metal products (300) advancing along a direction substantially parallel to their direction of longitudinal extension, said device (100) being adapted to cut said flat metal products (200) transversely relative to their direction of advancement, wherei...

Plant (10) for the continuous casting of metal products comprising a mould (12) in which a metal (L) in the molten state is able to be poured with a determinate flow rate (Q), a regulation device (16) capable of regulating said flow rate (Q), a control unit (18) configured to manage at least the movements of said re...

The invention relates to a steel product processing plant, in particular comprising a rolling line (200; 66) and preferably upstream thereof a continuous casting line (4; 6), comprising: at least one steel product direct cooling or cleaning system (202), or another system suitable to spray water on the product being...

Electric arc furnace (10) usable for melting a metal charge (M) and comprising a container (11) having at least one perimeter wall (20) in which there are an upper aperture (21), a lateral slagging aperture (22) and a lateral feed aperture (43). A roof (15), able to be opened selectively, can be positioned on the up...

Rolling method to produce a metal strip (P) in coil-to-coil, semi-endless or endless mode, in a rolling plant (10) comprising: - a continuous casting device (11) to produce slabs; - a furnace (16) configured to maintain the slabs at a certain temperature and/or to heat the slabs; - at least one roughing stand (25) t...

The invention concerns a steel plant for the production of long or flat products with a treatment circuit of water deriving from direct cooling and a relative process that envisage that the cooling waters coming from first machinery (10, 12; 86, 88; 134, 136, 138; 224, 226, 228) that produce cooling waters less load...

An annealing apparatus for a metal strip (9) advancing along a longitudinal direction into a coating system for coating said metal strip with a layer of molten metal, said apparatus comprising, in sequence: - at least one longitudinal-flow induction heating device (10); - at least one transverse-flow induction heati...

Heating furnace (10) for a plant (100) for the production of rolled products (P), wherein the heating furnace (10) comprises a tunnel (11) and a plurality of heating means (20). The heating means (20) comprise electrically powered heating elements (23, 24, 25).

Mould (10) for the continuous casting of a metal material, having a crystallizer (13) comprising a plurality of plates (11) which define between them a casting channel (12) having a casting direction (X), and wherein at least one of said plates (11) has an internal surface (19) that delimits said casting channel (12...

Plant (10) for treating flat metal products (50) comprising at least one optical scanning station (11) to scan said metal products (50) and a movement unit (12) to selectively move the metal products (50) as a function of the results of the optical scanning performed.