The present invention relates to a converter slag stopping mechanism of easy and quick installation for pig iron processing.
Background of the Invention:
Converter is a kind of steel-making furnace. The furnace body is cylindrical, which is mounted on a horizontal axis bracket and can be rotated. Reduction of slag amount is important to improve the quality of hot steel and one of the long-term problems affecting the development of steel-making. In order to optimize converter slag stopping technology at home and abroad, more than ten slag stopping methods, such as slag stopping cap, slag stopping ball, slag stopping plug, pneumatic slag stopping, electromagnetic slag stopping, vacuum slag suction and siphon tapping, have been invented, but the success rate of slag stopping is low and the effect is not ideal. Moreover, as the slag stopping mechanism is located in the high-temperature smelting area, it is extremely easy to be overheated and deformed at high temperature in the process of converter blowing or even damaged after long-term operation, so it cannot be used and has to be replaced frequently. The existing converter slag stopping mechanisms is complex in structure, inconvenient in installation, time-consuming and laborious.
Reference is made to the Patent application number CN103451358A, by Yang Wei and Yang Yufu, dated 31/05/2012, titled "Slag-blocking steel-tapping device for revolving furnace". The invention discloses a slag-blocking steel-tapping device for a revolving furnace. The slag-blocking steel-tapping device includes a connecting plate, a mounting plate and a doorframe. Both sides of the upper face of the connecting plate are each provided with a guiding positioning hook, a positioning column and a swing bolt; both sides of the mounting plate are each provided with a hook shaft and half of a groove hole, and the mounting plate is embedded onto the connecting plate through the positioning columns; the door frame is connected with the mounting plate through a door frame hinge pin, sliding bars are arranged in the doorframe, sliding frames can sliding located in the door frame respectively along the sliding bars, and the interior of each sliding frame is provide with a spring box; the interiors of the sliding frames are also provide with a sliding slide plate brick and a sliding water gap brick, and the sliding slide plate brick and the sliding water gap brick are respectively provided with a steel flowing

hole; the mounting plate is provided with a fixed slide plate brick, and the sliding slide plate brick, the sliding water gap brick and the fixed slide plate brick perform relative motion.
Another reference is made to the Patent application number 602/KOLNP/2015, by JFE STEEL CORPORATION dated 30/10/2012, titled "Sliding shutter for tank with metal melt". When manufacturing molten steel from hot metal using a two base converter-type refining furnace and using one as a hot metal pre-treatment refining furnace and the other as a hot metal decarburization refining furnace, the molten slag generated in the decarburization refining furnace is used while still hot as a refining agent in the pre-treatment refining furnace without compromising the productivities of the two refining furnaces. A refining method for manufacturing molten steel from hot metal using a converter type refining furnace with at least two bases and using one as a hot metal pre-treatment refining furnace and using the other as a decarburization refining furnace for the hot metal pre-treated in the pre-treatment refining furnace. After the molten steel obtained by decarburization refining in the decarburization refining furnace has been tapped in a ladle, the slag remaining inside the decarburization refining furnace is allowed to flow down, still in the molten state from above stacked iron scraps to solidify at least a portion of the slag. Then in pre-treatment of hot metal in the pre-treatment refining furnace, the slag, at least a portion of which has been solidified, is used together with the iron scraps while still hot.
Another reference is made to the Patent application number CN103525973A, by Wan Lixin, Zhao Jizeng, Wang Zhengfeng, Zhao Feng, Zhao Antang and Sun Xingqi, dated 30/09/2013, titled "Converter mechanism for slag blocking and steel tapping through sliding plates". The invention discloses a converter mechanism for slag blocking and steel tapping through sliding plates. A fixed frame is fixed on a connecting plate, an opening and closing frame is connected to the fixed frame through a hinge pin roll, a sliding frame is arranged inside the opening and closing frame, slidable sliding rails and fixed sliding rails are correspondingly arranged on two sides of the sliding frame and the opening and closing frame respectively, an inner nozzle brick is installed inside the fixed frame and pressed tightly by an inner nozzle pressing plate, an inner sliding plate brick is installed inside the fixed frame, an outer sliding plate brick is installed inside the sliding frame, an outer nozzle brick is installed inside an outer nozzle base and pushed against tightly by an outer

nozzle pusher, and a driving device is located at the top of the sliding frame and connected with the sliding frame through a pin roll.
Another reference is made to the Patent application number 736/CHENP/2003, by SMS DEMAG AG dated 14/05/2003, titled "A Method of Producing Stainless Steels". The invention relates to a method for producing stainless steels, in particular steels containing chromium and chromium-nickel. The method is carried out in a melting device containing a metallurgical vessel, or in a melting device containing at least two vessels for supplying a steel-casting installation, an electric arc furnace process and an air-refining process taking place alternately in the two vessels. To improve the efficiency of a method of this type, the aim of the invention is to carry out a reversible treatment of unreduced converter slag in the electric arc furnace mode. To achieve this, in the first treatment stage, the slag with a high chromium content is melted together with the added charge, the slag is then reduced during the melting process with the silicon and carbon under favourable thermodynamic conditions of the arc, once the slag has reached a minimum temperature of 1,490 °C and the slag is subsequently removed. The air-refining process is then carried out, during which the carbon content is reduced to a value of less than 0.9 %. The metal slag is tapped at a tapping temperature of between 1,620 and 1,720 °C, the unreduced slag with a high chromium content from the air-refining process remaining in the treatment vessel.
Another reference is made to the Patent application number 3331/MUM/2012, by Dinesh S. Shukla dated 20/11/2012, titled "A Graphitic Cast Iron Composition (Crucible) For Complete Aluminium Melting Process of Aluminium Scrap Using Medium Frequency Induction Furnace with Graphitic Cast Iron Pot/Silicon Carbide Pot/Graphite Pot". A Complete Melting Process of aluminium scrap using medium frequency induction furnace for production of different grades of Aluminium and Aluminium Alloys as suitable for automobile industries, die caster (GDC,PDC,LPDC), sand casting, permanent mould casting, extrusion etc, comprising the following steps: Cleaning and charging, clean scrap and/ or Pure Ingot and / Alloying Metal, Virgin Aluminium / Scrap in which added a Pure Cu, Si, Mn, Ti & Cr With Initial Charging, Late additions of Mn, Ti, Cu, Si, Ni & Cr is Added as Pure Metal with help of squirrel cage arrangement (if required for composition setting). Also process of Degassing, Fluxing, Flushing & Structure Modification is possible. The melting process is suitable for intermittent operation as well as

continues operations. All type of commercial scrap as well as processed dross can be melted with Induction Furnace. Generated Slag & Final disposal is neutral in nature. This process is clean and provides Carbon Credit due to low pollution.
Another reference is made to the Patent application number 2543/MUMNP/2014, by BAOSHAN IRON & STEEL CO. LTD dated 29/06/2012, titled "Control Method and Apparatus for Continuous Casting Steel Pouring". A control method for continuous casting steel pouring. The method comprises: 1. measuring and reading a ladle casting location signal by using a ladle location sensor mounted on a ladle rotary table; 2. determining in a steel pouring optimization control computer whether the steel pouring of the ladle starts; 3. feeding steel slag measurement data back to an inference controller by using a steel slag measurement sensor mounted above a ladle slide gate nozzle; 4. in the inference controller comparing the read steel slag measurement data with a manually set steel slag value; if the steel slag measurement data is smaller than the manually set steel slag value returning to a previous step; and if the steel slag measurement data is greater than the manually set steel slag value outputting and feeding a cylinder control variable to a PI controller; and 5. in the PI controller comparing a fed in cylinder location signal with an actually measured cylinder location signal and performing calculation and outputting to control a cylinder driving unit to push a cylinder to move so as to make the opening degree of the ladle slide gate nozzle smaller. An apparatus for continuous casting steel pouring using the above control method is further provided. By means of the above method and apparatus the amount of the molten steel flow of the ladle is controlled thereby improving the yield of the molten steel and decreasing the production cost.
Another reference is made to the Patent application number 850/MUM/2010, by JSW STEEL LIMITED dated 25/03/2010, titled "A Method of Controlled Ramping of Tundish Weight for Reduced Emulsification and A System Thereof". The invention relates to a method for weight-based auto ramping of liquid steel in tundish during ladle change over adapted to reduce emulsification by controlled slow rate of steel filling and a system to implement the method. The method involves low filling rate of steel as a function of the ladle through put and result in ladle filling to desired level in 12-15 minutes time avoiding turbulence in liquid steel and minimizing silica inclusion or slag entrapment, ensuring improved cleanliness and quality of cast steel. The system of the invention is having PLC based control of

pneumatically operating/opening slide gate for steel filling in tundish favoring automatic weight-based filling up to a safe level. The auto ramping of tundish is thus capable of wide industrial application in steel industry with less defects and rejections of change over slabs in continuous casting, with improved productivity at less cost in a safe and reliable manner.
Another reference is made to the Patent application number 9141/DELNP/2014, by JFE STEEL CORPORATION dated 30/11/2012, titled “Method for Manufacturing High Purity Steel Casting and Tundish”. A tundish provided with a weir having a wall part and an eaves-shaped part projecting horizontally at the upper edge part of the wall part i s used to float up and separate inclusions i n molten steel in a more reliable and effective manner than in the past. A tundish provided with a weir having a notch at one or more locations, and having a wall part that extends up - ward so as to surround the molten metal injector：from four directions, and further having an eaves-shaped part that projects horizontally at the upper edge part of the wall part, the weir being positioned between a molten steel injector and a molten steel tap hole, i s used to continuously cast steel castings within a range in which the molten steel bath surface height (H) and the flow rate (Q) at which the molten steel i s injected into the tundish satisfy formula, where i s the weir height, S is the area of the upper opening part, L is the distance from the distal end of the eaves-shaped part to the short- side surface of the tundish, and W is the distance from the distal end of the eaves-shaped part to the long- side surface of the tundish.
Another reference is made to the Patent application number CN101139640A, by Yan Yang, Yang Yufu, Wang Likun, Wang Wenli and Cai Yonghua, dated 25/09/2007, titled “Revolving furnace tap hole sliding gate slag-fending valve apparatus”. The invention provides a gate valve mechanism at a slide water gap at a tap hole of a converter, pertains to a steel-making machine, and is characterized in that semi-circular slots on an installation board are correspondingly inserted into positioning columns and positioning piles on a connection board, so reliable positioning is achieved; hold-down blind spring grooves with through bolt holes are provided at left and right side of a door frame, in each hold-down blind spring groove, hold-down springs and hold-down spring platens with through bolt holes are provided; the door frame and the hold-down spring platens pass through long hold-down bolts and are mounted rotatably on
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the installation board; at the bottom boards at the left and right inner side of the door frame, draw slips are provided; at the upper and lower part of the left and right outside of the slide frame, contact rollers are placed; rotating tightly the long hold-down bolts, the pressure will act on the contact rollers and the slide frame, so that the contact surfaces between sliding slide-board bricks and fixed slide-board bricks contact closely, which ensures very good air tightness and guarantees no steel and slag leakage; in addition, at the left and right side of the installation board, locking devices and hinging hooks are symmetrically arranged in vertical way for installing and dismounting oil cylinder, which allows rapid and reliable dismounting on line.
Another reference is made to the Patent application number US4776083A, by Manabu Sakamoto, Satoshi Tatsuta, Akira Murata, Natsuki Namura, Shigeki Tamada, Yoshinori Kawasaki and Norio Misaki, dated 22/03/1986, titled “Apparatus for mounting a siphon tapping tube onto a converter vessel”. This invention provides an apparatus for mounting a siphon tapping tube onto a tap hole mounting part of a converter vessel has a lower car and an upper car, which are placed on a ladle car which travels beneath a converter vessel, the lower car and the upper car being capable of travelling in the direction of the travel of the ladle car and in the direction perpendicular to that of the travel of the ladle car, respectively, a loading table mounted on the upper car, which is guided by an upright support frame and being capable of moving upward and downward with a siphon tapping tube loaded on the table, and bolt tightening and untightening units which are provided on the loading table in positions corresponding to the respective bolt hole set positions in the flange of the siphon tapping tube and are capable of receiving mounting bolts. TV camera is provided on the upper car, allowing the operator to monitor the tap hole mounting part.
Another reference is made to the Patent application number 67/KOL/2014, by Mitra Mazumder Subhajit, Satya Prakash, Tiwari Satyendra Nath, Agrawal Roopak and Choubey Mukteshwar, dated 16/01/2014, titled “A System for Stabilization of Steel Making (BOF) Slag Through Hydration Treatment and A Method of Such Stabilization”. The present invention relates to a system for stabilization of Steel Making (BOF) slag through hydration treatment using saturated steam and method for such stabilization. More particularly, the present invention is directed to provide a system for accelerated primary stabilization of BOF slag using steam
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as medium of stabilization through hydration, by introduction of saturated steam at predetermined pressure and temperature into a pressure vessel such as to induce penetration of steam into the slag sample and thereby stabilize the slag. The system and method to stabilize Steel Making (BOF) slag monitors the progress of the hydration reaction through surrogate parameters of pH and alkalinity which when stabilized can be used as indicator of end point of reaction and therefore can be used as an indicator of stabilization of BOF slag involving the stabilization of free lime at reduced level avoiding the conventional technical limitation of expansion of BOF slag and thus rendering the slag suitable for further use/reuse for variety of applications.
Another reference is made to the Patent application number 7281/DELNP/2014, by HARADA Toshiya, ARAI Takashi and FUKUMURA Hiroki, dated 29/08/2014, titled “Slag Supply Container for Electric Furnace for Steel Slag Reduction”. The invention discloses that this slag supply container for an electric furnace for steel slag reduction is provided with: a container body that causes hot steel slag to flow toward the electric furnace; a slag discharging part connected to an electric furnace side slag supply opening; a slag receptacle that receives a supply of the hot steel slag; a lid that opens and closes the slag receptacle; an exhaust part that discharges exhaust gas from the electric furnace; and a tilting device that tilts the container body so as to adjust the amount of hot steel slag that flows into the electric furnace side slag supply opening.
Another reference is made to the Patent application number CN204097504U, by Liang Haibo, Zhao Jizeng, Zhao Feng, Yu Xiping and Zhao Antang, dated 10/10/2014, titled “Converter sliding plate slag stopping mechanism”. The utility model discloses a converter sliding plate slag stopping mechanism, comprising a connecting assembly, a mechanism installation assembly, a mechanism switching assembly and a mechanism sliding assembly. The converter sliding plate slag stopping mechanism provided by the utility model effectively stops the slag of a converter to avoid production accidents, and meanwhile, reduce the maintenance cost and improve the production efficiency.
Another reference is made to the Patent application number CN202139256U, by Wu Baozhong, Wu Qiang, Zhang Qingping, Zhang Hong, Zhang Xiang and Maurobo, dated 30/06/2011, titled “Slag-blocking gate valve mechanism for steel-
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tapping hole of converter”. The utility model relates to a slag-blocking gate valve mechanism for a steel-tapping hole of a converter. The slag-blocking gate valve mechanism comprises a fixing frame, a switching frame, a sliding frame, a fixed sliding plate brick, a movable sliding plate brick both, an outer nozzle brick, an outer nozzle fixing frame, and an outer nozzle mounting frame, wherein the middle parts of the fixed sliding plate brick and the moveable sliding plate brick are provided with holes; the fixing frame and the switching frame are arranged from the top to the bottom and are connected with each other through a pin shaft; the sliding frame is arranged in the switching frame; the fixed sliding brick is fixed in the fixing frame; the movable sliding plate brick and the outer nozzle brick are fixed in the sliding frame from the top to the bottom; the upper surface and the lower surface of the movable sliding brick are respectively contacted with the fixed sliding plate brick and the outer nozzlebrick; tosliding guide rail on the lower surface of the sliding frame is contacted with a fixed guide rail on the upper surface of the switching frame; an outer nozzle mounting frame fixed on the sliding frame is arranged between the switching frame and the outer nozzle brick; and the outer nozzle fixing frame is arranged between the outer nozzle mounting frame and the recess of the outside diameter of the lower part of the outer nozzle brick. The structure can be staggered in a sliding way through two sliding plate bricks with holes; and the steel-tapping hole is opened or closed to block the slag and discharge the steel.
Another reference is made to the Patent application number 8779/CHENP/2012, by SMS SIEMAG AG, dated 19/03/2010, titled “Device and Method for Closing an Outflow Opening of a Metallurgical Vessel”. The invention relates to a device and a method for closing an outflow opening of a metallurgical vessel. The device comprises a stopper rod which is arranged in the vessel above the outflow opening for closing the outflow opening a stopper rod mechanism for raising and lowering the stopper rod and a sensor for sensing oscillations of the stopper rod or the stopper rod mechanism. To detect the point in time for closing the outflow opening of the metallurgical vessel at as early a time as possible and to achieve an optimum separation between molten material and slag the device has a controller for activating the closing means for the outflow opening of the vessel depending on the factor of the oscillations at the stopper rod or at the stopper rod mechanism that are sensed by the sensor.
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Another reference is made to the Patent application number 10213/DELNP/2014, by Siemens Vai Metals Technologies Gmbh, dated 23/11/2012, titled “Slag Granulation System and Method of Operation”. This invention discloses a slag granulation device comprises a slag granulation chamber; a rotary atomising granulator to atomise molten slag the granulator being mounted in the granulation chamber; and an air supply to supply air to the molten slag before the slag is atomised. The system further comprises a slag delivery mechanism for delivering slag to the granulation chamber. The slag delivery mechanism comprises a pipe connected to a slag inlet of the granulation chamber and the system further comprises an air lance mounted inside the pipe. An air supply is coupled to an end of the lance remote from the granulation chamber and the lance has a perforated section remote from the air supply whereby air is supplied to the molten slag.
Another reference is made to the Patent application number 6178/CHE/2013, by ABB Technology Ltd, dated 31/01/2014, titled “An Apparatus and A Method for Handling Molten Medium in Continuous Casting Process”. The present invention relates to an apparatus for handling molten medium in a continuous casting process. The apparatus comprises of a regulator for regulating the molten medium with electromagnetic stirrer for effecting stirring in the molten medium electromagnetically and electromagnetic brake for effecting braking in the molten medium electromagnetically. The invention also relates to a method for handling molten medium in a continuous casting process. The method comprises the steps of effecting stirring and braking in the molten medium electromagnetically.
Another reference is made to the Patent application number 1581/CHE/2012, by JFE Steel Corporation, dated 23/04/2012, titled “Method of Producing Steel”. This invention relates to a method of producing a high-cleanness steel, which comprises a blowing step of blowing steel in a converter, a tapping step of tapping molten steel blown in the blowing step into a ladle together with a slag, a slag modifying step wherein calcium carbonate is added to the slag floating on the molten steel received in the ladle to generate carbon dioxide and Al dross is scattered onto the slag and reacted with FeO in the slag to render (T. Fe) in the slag into not more than 10 mass% and (CaO)/(Al2O3) into 1-2 by mass ratio, a secondary refining step wherein the slag-modified molten steel is decarburized in a top oxygen blowing vacuum degassing apparatus to reduce [C] in molten steel to not more than 100 mass ppm and then deoxidized, and a continuous casting
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step of continuously casting the secondary refined molten steel in a non-oxidizing atmosphere, in which [O] in molten steel after the secondary refining is reduced to not more than 50 mass ppm.
Another reference is made to the Patent application number 37/KOL/2012, by TATA Steel Limited, dated 16/01/2012, titled “An Improved Wedge Shape Single-Strand Tundish in a Continuous Metal Casting Process”. This invention relates to a single strand wedge shape tundish to receive molten metal from a ladle at an inlet and discharge to a mould through an outlet for solidification in a continuous casting process, the tundish having a well block at the bottom near the outlet, and a flow-control device, characterized in that the bath height of the tundish is configured at a value not more than 1.23 meters for casting at a maximum throughput of 3.5 ton/minute, and in that the length and width is maintained at 4.0 meters and 0.67 meters respectively.
Another reference is made to the Patent application number 4933/CHENP/2009,
by Sumitomo Metal Industries, dated 25/01/2007, titled “Steel Continuous
Casting Process”. The present invention provides a steel continuous casting process in which a molten steel path from an upper nozzle of a tundish to a submerged entry nozzle via a sliding gate is provided, the whole or part of the molten steel path constituting one electrode and generating an electric current due to a potential difference provided between the inner surface of the molten steel path and molten steel passing through the inside of the molten steel path, characterized in that: the other electrode is provided in a portion except for a refractory constituting said one electrode in the tundish to thereby form an electrical circuit between said portion and the molten steel path; the polarity of the molten steel path and the polarity of the other electrode repeatedly alternate in a time period of 1 to 100 ms ; and a current or voltage is controlled to electrify such that the polarity of the molten steel path, which is defined by an average current or an average voltage, is regarded as the cathode. Therefore, the clogging of the molten steel path from the tundish to the submerged entry nozzle can be prevented to perform stable continuous casting. In the continuous casting process, it is preferable that an average current density ranges from 3 to 200 A/m2 and the polarities alternate in a pulse-like waveform.
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Another reference is made to the Patent application number WO2012040941A1, by Zhou Jiule, dated 27/09/2010, titled “Siphon tapping device for blast furnace iron-making”. This invention provides a blast furnace iron siphoned off means, including the blast furnace, characterized in that the top-hole is provided in the direction of a blast furnace hot metal transport channels, a blast furnace top-hole of the blast furnace through the input channel and a CRC forehearth is connected to the upper side of the front of the furnace top-hole is opened, a blast furnace top-hole, and the top-hole forehearth are provided at the tapping machine.
However, none of the above discussed inventions provide a Converter Slag Stopping Mechanism of Easy and Quick Installation comprises of a slag stopper, a lower nozzle installation frame and a sliding frame with fixing through-holes at corresponding positions, wherein said slag stopper, the lower nozzle installation frame and the sliding frame are installed from top to bottom, said mechanism characterized in that the slag stopper is a flat plate; and the lower nozzle installation frame is hollow.
Objects of the invention:
The main objective of the present invention is to provide a Converter Slag Stopping Mechanism of Easy and Quick Installation
Another objective of the present invention is to control the flow of metal casting.
Another objective of the present invention is to minimize a risk of breakout accident during operation.
Another objective of the present invention is to minimize the risk of steel re-oxidation.
Summary of the invention:
The present invention provides a converter slag stopping mechanism of easy and quick installation including a slag stopper, a lower nozzle installation frame and a sliding frame; the slag stopper is a flat plate; the lower nozzle installation frame is hollow; the slag stopper, the lower nozzle installation frame and the sliding frame are installed from top to bottom. Two primary fixing through-holes, two secondary fixing through-holes and two tertiary fixing through-holes are provided
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respectively at the slag stopper, the lower nozzle installation frame and the sliding frame; the slag stopper, the lower nozzle installation frame and the sliding frame are fixed together by two fixing bolts which in turn pass through the primary fixing through-hole, the secondary fixing through-hole and the tertiary fixing through-hole; the fixing bolts are engraved with external threads, and the primary, the secondary and the tertiary fixing through-holes are engraved with internal threads that match the external threads; the upper end of the lower nozzle installation frame is provided with flanges, and the secondary fixing through-holes are symmetrically provided on the flange.
Statement of the invention:
Accordingly, the present invention provides an improved converter slag stopping mechanism with easy and quick installation, said mechanism comprising a slag stopper, a lower nozzle installation frame and a sliding frame with fixing through-holes at corresponding positions, said mechanism characterized in that the slag stopper, the lower nozzle installation frame and the sliding frame are installed successively from top to bottom and are fixed by inserting the same piece of fixing bolt in the provided through-holes, thus making the entire installation easy, quick and effective.
Description of Figures:
Figure 1 shows a structural schematic diagram of the converter slag stopping mechanism of easy and quick installation. Where referral numerals are follows:
1 - sliding frame; 2 - slag stopper; 3 - lower nozzle installation frame; 4 - fixing bolts; 5 - primary fixing through-hole; 6 - secondary fixing through-hole; 7 -tertiary fixing through-hole; 8 - nut.
Detailed description of the invention:
It should be noted that the particular description with features, designs, components, construction, working and embodiments set forth in the specification below are merely exemplary of the wide variety and arrangement of instructions which can be employed with the present invention. The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. All the features disclosed in this specification may be replaced by similar other or alternative features performing similar or same or
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equivalent purposes. Thus, unless expressly stated otherwise, they all are within the scope of present invention. Various modifications or substitutions are also possible without departing from the scope or spirit of the present invention. Therefore, it is to be understood that this specification has been described by way of the most preferred embodiments and for the purposes of illustration and not limitation.
The present invention discloses a converter slag stopping mechanism of easy and quick installation including a slag stopper (2), a lower nozzle installation frame (3) and a sliding frame (1); the slag stopper (2) is a flat plate; the lower nozzle installation frame (3) is hollow; the slag stopper (2), the lower nozzle installation frame (3) and the sliding frame (1) are installed from top to bottom. Two primary fixing through-holes (5), two secondary fixing through-holes (6) and two tertiary fixing through-holes (7) are provided respectively at the slag stopper (2), the lower nozzle installation frame (3) and the sliding frame (1); the slag stopper (2), the lower nozzle installation frame (3) and the sliding frame (1) are fixed together by two fixing bolts (4) which in turn pass through the primary fixing through-hole (5), the secondary fixing through-hole (6) and the tertiary fixing through-hole (7); the fixing bolts (4) are engraved with external threads, and the primary, the secondary and the tertiary fixing through-holes are engraved with internal threads that match the external threads; the upper end of the lower nozzle installation frame (3) is provided with flanges, and the secondary fixing through-holes (6) are symmetrically provided on the flange.
This converter slag stopping mechanism of easy and quick installation also includes two nuts (8) that match the fixing bolts (4); two recesses for nuts (8) are engraved at the two tertiary fixing through-holes (7) on the lower surface of the sliding frame (1); axis of the recess coincides with the axis of the tertiary fixing through-holes (7); the nut (8) is inside the recess; the fixing bolt (4) in turn passes through the three fixing through-holes and connects to the nut (8).
The fixing bolt (4) has the same specifications as the face pressing bolt and the pneumatic trigger sleeve is employed universally which can be replaced by the pneumatic trigger directly when installed and replaced on site. As the slag stopper (2), the lower nozzle installation frame (3) and the sliding frame (1) are fixed from top to bottom with the same pieces of bolt passing through. The installation is
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convenient and quick, which greatly saves the time for installing or replacing the slag stopping mechanism.
So, accordingly in the preferred embodiment, the present invention discloses an improved converter slag stopping mechanism with easy and quick installation, said mechanism comprising a slag stopper (2), a lower nozzle installation frame (3) and a sliding frame (1) with fixing through-holes at corresponding positions, said mechanism characterized in that the slag stopper(2), the lower nozzle installation frame(3) and the sliding frame(1) are installed successively from top to bottom and are fixed by inserting the same piece of fixing bolt (4) in the provided through-holes, thus making the entire installation easy, quick and effective.
In an embodiment, said through-holes are at least two in number for each corresponding position as defined herein.
In another embodiment, said fixing through-holes are engraved with internal threads.
In yet another embodiment, said mechanism comprises two primary fixing through-holes, provided at the slag stopper.
In yet another embodiment, said mechanism comprises two secondary fixing through-holes provided at the lower nozzle installation frame.
In another embodiment, mechanism comprises two tertiary fixing through-holes provided at the sliding frame.
In yet another embodiment, slag stopper, the lower nozzle installation frame and the sliding frame are fixed together by two fixing bolts which in turn pass through said primary fixing through-hole, the secondary fixing through-hole and tertiary fixing through-hole.
In another embodiment, said fixing bolts are engraved with external threads, which match with the internal threads of said fixing through-holes.
In yet another embodiment, said upper end of the lower nozzle installation frame is provided with flanges, and said fixing bolt passes through the flange.
In yet another embodiment, said mechanism comprises nuts that match the fixing bolts, a recess fitting the nuts is engraved at the fixing through-hole on lower surface of the sliding frame, the axis of the recess coincides with that of the fixing
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through-hole and the nut is inside the recess; the fixing bolts successively go through the fixing through-holes of the slag stopper, the lower nozzle installation frame and the sliding frame and then connect to the nuts.
In another embodiment, said slag stopper is a flat plate.
In another embodiment, said lower nozzle installation frame is hollow.
Advantages:
• As the slag stopper, the lower nozzle installation frame and the sliding frame are installed successively from top to bottom and fixed by inserting the same piece of fixing bolt through the through-holes, the installation is convenient and quick, which greatly saves the time for replacing the slag stopping mechanism;
• As the same piece of fixing bolt goes through and fixes the slag stopper, the lower nozzle installation frame and the sliding frame together, the fitting among them is more accurate, thus preventing mechanism damage or failure of slag stopping caused by relative displacement of the three parts at the joints during operation;
• As at least two symmetrical fixing through-holes are set, the connection among the slag stopper, the lower nozzle installation frame and the sliding frame is more stable and firmer; and
• As internal threads of the fixing through-holes are matched with the external threads and nuts are arranged on the surface under the sliding frame, thus the treads fit the nuts as well as the fixing bolts to make the structure of converter slag stopping mechanism more solid and assembled tighter.

We Claim:

An improved converter slag stopping mechanism with easy and quick installation, said mechanism comprising a slag stopper (2), a lower nozzle installation frame (3) and a sliding frame (1) with fixing through-holes at corresponding positions, said mechanism characterized in that the slag stopper(2), the lower nozzle installation frame(3) and the sliding frame(l) are installed successively from top to bottom and are fixed by inserting the same piece of fixing bolt (4) in the provided through-holes, thus making the entire installation easy, quick and effective.
. The improved converter slag stopping mechanism with easy and quick installation, wherein said through-holes are at least two in number for each corresponding position as defined herein.
. The improved converter slag stopping mechanism with easy and quick installation, wherein said fixing through-holes are engraved with internal threads.
. The improved converter slag stopping mechanism with easy and quick installation, wherein said mechanism comprises two primary fixing through-holes (5), provided at the slag stopper (2).
. The improved converter slag stopping mechanism with easy and quick installation, wherein said mechanism comprises two secondary fixing through-holes (6) provided at the lower nozzle installation frame (3).
. The improved converter slag stopping mechanism with easy and quick installation, wherein said mechanism comprises two tertiary fixing through-holes (7) provided at the sliding frame (1).
. The improved converter slag stopping mechanism with easy and quick installation, wherein said slag stopper (2), the lower nozzle installation frame (3) and the sliding frame (1) are fixed together by two fixing bolts (4) which in turn pass through said primary fixing through-hole (5), the secondary fixing through-hole (6) and tertiary fixing through-hole (7).
. The improved converter slag stopping mechanism with easy and quick installation, wherein said fixing bolts (4) are engraved with external threads, which match with the internal threads of said fixing through-holes.
. The improved converter slag stopping mechanism with easy and quick installation, wherein said upper end of the lower nozzle installation frame

(3) is provided with flanges, and said fixing bolt (4) passes through the flange.
The improved converter slag stopping mechanism with easy and quick installation, wherein said mechanism comprises nuts (8) that match the fixing bolts (4), a recess fitting the nuts (8) is engraved at the fixing through-hole on lower surface of the sliding frame (1), the axis of the recess coincides with that of the fixing through-hole and the nut (8) is inside the recess; the fixing bolts (4) successively go through the fixing through-holes of the slag stopper (2), the lower nozzle installation frame (3) and the sliding frame (1) and then connect to the nuts (8).
The improved converter slag stopping mechanism with easy and quick installation, wherein said slag stopper (2) is a flat plate. The improved converter slag stopping mechanism with easy and quick installation, wherein said lower nozzle installation frame (3) is hollow.