CN111893246B - Steel ladle assembly for transferring and purifying molten steel - Google Patents
Steel ladle assembly for transferring and purifying molten steel Download PDFInfo
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- CN111893246B CN111893246B CN202010743530.0A CN202010743530A CN111893246B CN 111893246 B CN111893246 B CN 111893246B CN 202010743530 A CN202010743530 A CN 202010743530A CN 111893246 B CN111893246 B CN 111893246B
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- stirring
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/076—Use of slags or fluxes as treating agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a steel ladle assembly for molten steel transferring impurity removal, which comprises an outer frame, a steel ladle, a control rod, a linkage structure and a plug rod, wherein the bottom of the steel ladle is provided with a flow hole, the steel ladle assembly also comprises a shell, a cooling pipeline, an agitation mechanism, a slow flow mechanism and a discharge opening, the flow hole, the cooling pipeline, the agitation mechanism, the slow flow mechanism and the discharge opening are sequentially communicated, the shell wraps and seals the cooling pipeline, the agitation mechanism and the slow flow mechanism, and a flowing cooling liquid is reserved among the shell, the cooling pipeline, the agitation mechanism and the slow flow mechanism. Thereby achieving the purpose of removing impurities.
Description
Technical Field
The invention relates to a steel ladle used in the ferrous metallurgy industry, in particular to a steel ladle assembly for transferring molten steel and removing impurities.
Background
The lining of the ladle, which is more common in the ferrous metallurgy industry, is composed of an insulating layer made of light heat-insulating materials and a working layer built by refractory bricks. The ladle is used for receiving molten steel and pouring in front of an open hearth furnace, an electric furnace or a converter in a steel plant and a foundry. The currently common ladle structure is a plug rod type ladle, and the plug rod type ladle is suitable for transferring molten steel below 10 tons.
Aiming at the defects of local corrosion resistance and unstable welding performance of duplex stainless steel in the market, the applicant stabilizes the product quality by various methods such as smelting process, smelting temperature control, chemical component blending and the like. The current means is that the continuous floating of large-scale inclusion in molten steel is guaranteed to be adsorbed by slag by a plurality of modes such as increasing the LF stove weak blowing time, controlling the quantity of silicon and calcium in LF stove feeding molten steel, controlling the inclusion and the slag rolling phenomenon in AOD stove reduction and desulfurization period molten steel, and controlling the endogenetic inclusion that the LF stove produced in the refining stage. The AOD smelting, LF refining and continuous casting processes continuously reduce the total number and size of inclusions in molten steel, gradually reduce the total oxygen content, realize the increase of the corrosion resistance and the welding performance of the duplex stainless steel, and prolong the service life of the product while ensuring the use effect.
At present, when molten steel is transferred, the liquidity of the molten steel is reduced due to temperature cooling, floating of internal inclusions is influenced, and the steel quality is influenced when the inclusions are not timely adsorbed to slag.
Therefore, how to ensure that the molten steel is stirred so that internal inclusions contact slag in the process of transferring the molten steel to a ladle is a technical problem to be solved.
Disclosure of Invention
The invention aims to provide a ladle assembly for molten steel transferring and impurity removing.
In order to realize the purpose of the invention, the invention adopts the following technical scheme: a steel ladle assembly for molten steel transferring and impurity removing comprises an outer frame, a steel ladle, a control rod, a linkage structure and a plug rod, wherein the bottom of the steel ladle is provided with a flow hole, the steel ladle assembly further comprises a shell, a cooling pipeline, an agitation flow mechanism, a slow flow mechanism and a discharge opening, the flow hole, the cooling pipeline, the agitation flow mechanism, the slow flow mechanism and the discharge opening are sequentially communicated, the shell wraps and seals the cooling pipeline, the agitation flow mechanism and the slow flow mechanism, and a flowing cooling liquid is reserved among the shell, the cooling pipeline, the agitation flow mechanism and the slow flow mechanism,
the cooling pipeline is used for enabling molten steel to pass through the stirring mechanism, reducing the temperature and promoting slag to be attached to the wall of the pipeline, and sending the cooled molten steel to the stirring mechanism;
the stirring mechanism is used for receiving the molten steel and stirring the molten steel to enable inclusions precipitated in the molten steel to move towards the surface of the inner wall of the channel;
the slow flow mechanism is used for slowing down the downward impact speed of the molten steel;
and the discharge opening is used for receiving the molten steel flowing out of the slow flow mechanism and discharging the molten steel outwards.
Preferably, the turbulence mechanism comprises a turbulence pipe, a turbulence block and a turbine, the turbine and the turbulence block are pivoted in the turbulence pipe through a support, the turbine and the turbulence block rotate synchronously, the turbulence block comprises a turbulence channel, a turbulence inlet and a turbulence outlet, and two ends of the turbulence channel are connected with the turbulence inlet and the turbulence outlet.
Preferably, the stirring channel is spirally arranged along the axial center of the stirring block, the fluid drives the stirring block to twist when passing through the stirring channel, and the twisting direction of the stirring block is consistent with that of the turbine.
Preferably, a flow baffle is arranged at the inlet of the stirring channel, and a side hole is formed in the edge of the flow baffle.
Preferably, the stirring inlet and the stirring outlet are strip-shaped through holes, the stirring inlet is attached to the edge of the end face of the stirring block, the stirring outlets are arranged along the circumference of the end face of the stirring block, and the stirring outlets face the center of the stirring block.
Preferably, the flow slowing mechanism comprises a main flow channel, a horizontal flow slowing baffle wall, a flow slowing hole, a flow slowing channel and a vertical flow slowing baffle wall; the main flow channel is vertically arranged, and the lower part of the main flow channel is aligned with the horizontal flow buffering baffle wall; the side wall of the main flow channel is provided with a slow flow hole, and the slow flow hole faces the slow flow channel and is horizontally arranged; the vertical slow flow baffle wall is positioned in the slow flow channel and is aligned with the slow flow hole; the slow flow channel is communicated with the discharge opening.
Preferably, the height of the slow flow hole is larger than that of the horizontal slow flow baffle wall.
Preferably, the middle part of the horizontal flow-slowing baffle wall is provided with a drain hole.
Preferably, the cooling pipeline is coiled at the bottom of the ladle.
Compared with the prior art, the ladle assembly for molten steel transferring and impurity removing has the following beneficial effects that:
firstly, the ladle assembly for molten steel transferring and impurity removing is adopted, the stirring mechanism is additionally arranged at the bottom of the ladle, and impurities in the molten steel are continuously rolled to the outermost position of the molten steel in a molten steel stirring mode, so that slag adsorbs the impurities.
And secondly, when the molten steel passes through the cooling pipeline, cooling liquid can be introduced between the cooling shell and the cooling pipeline, so that the temperature of the molten steel in the pipeline is reduced, slag is precipitated between the molten steel and the pipeline wall, and the adsorption area of inclusions is increased.
And thirdly, the slow flow mechanism enables the flowing direction of the molten steel to be changed from vertical downward flowing to horizontal flowing, so that the molten steel is prevented from directly impacting downward to form overlarge sputtering.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a ladle assembly for molten steel transferring and impurity removing according to the present invention.
Fig. 2 is a schematic structural diagram of a ladle assembly in the embodiment.
Fig. 3 is a cross-sectional view of a ladle assembly in an embodiment.
FIG. 4 is a schematic structural diagram of the turbulence mechanism in the embodiment.
FIG. 5 is a sectional view of the turbulent flow mechanism in the embodiment.
Fig. 6 is a schematic exploded view of the turbulence mechanism in the embodiment.
Fig. 7 is a schematic structural view of the flow baffle in the embodiment.
FIG. 8 is a schematic structural diagram of a stirring block in the embodiment.
FIG. 9 is a schematic structural view of a turbulent flow inlet in the embodiment.
FIG. 10 is a schematic structural view of a turbulent flow outlet in the embodiment.
FIG. 11 is an enlarged view of the flow of molten steel at A in FIG. 3.
Reference numerals: 1. a steel ladle; 10. a stopper rod; 11. a linkage structure; 12. a control lever; 13. an outer frame; 14. an orifice; 2. a cooling duct; 3. a flow stirring mechanism; 30. a stirring pipe; 31. a flow baffle plate; 310. a side hole; 32. stirring the flow block; 320. a churning channel; 321. a churning inlet; 322. a churning outlet; 323. a side overflow hole; 33. a support; 34. a turbine; 4. a flow slowing mechanism; 40. a horizontal buffer wall; 41. a flow-slowing hole; 42. a slow flow channel; 43. a vertical buffer wall; 44. emptying holes; 45. a main flow channel; 5. a discharge opening; 6. the housing is cooled.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The ladle assembly for molten steel transferring and impurity removing as shown in fig. 3 comprises a ladle 1, an outer frame 13, a control rod 12, a linkage structure 11 and a stopper rod 10, wherein the bottom of the ladle 1 is provided with a flow hole 14.
By pressing down the control rod 12, the linkage structure 11 drives the plug rod 10 to move upwards, the flow hole 14 is separated from the plugging of the plug rod 10, and the molten steel flows downwards from the flow hole 14.
The ladle subassembly still includes cooling shell 6, cooling tube 2, the stirring mechanism 3, slow flow mechanism 4 and discharge opening 5, and discharge orifice 14, cooling tube 2, stirring mechanism 3, slow flow mechanism 4 and discharge opening 5 communicate in proper order, and cooling shell 6 parcel and sealed cooling tube 2, stirring mechanism 3 and slow flow mechanism 4 leave flowable cooling liquid between cooling shell 6 and cooling tube 2, stirring mechanism 3 and the slow flow mechanism 4.
The cooling pipeline 2 is used for enabling molten steel to pass through, reducing the temperature and promoting slag in the pipeline wall to be attached, and sending the cooled molten steel to the stirring mechanism 3; the cooling pipeline 2 is coiled at the bottom of the steel ladle 1, so that the cooling time of the molten steel is prolonged.
The stirring mechanism 3 is used for receiving molten steel and stirring the molten steel, so that impurities precipitated in the molten steel move towards the inner wall surface of the channel (actually, the impurities move towards the surface of the molten steel).
The stirring mechanism 3 comprises a stirring pipe 30, a stirring block 32 and a turbine 34, wherein the turbine 34 and the stirring block 32 are pivoted inside the stirring pipe 30 through a bracket 33, the turbine 34 and the stirring block 32 rotate synchronously, the stirring block 32 comprises a stirring channel 320, a stirring inlet 321 and a stirring outlet 322, and two ends of the stirring channel 320 are connected with the stirring inlet 321 and the stirring outlet 322.
The turbine 34 is driven to rotate by the molten steel, the turbine 34 drives the stirring block 32 to slowly rotate, the stirring block 32 rotates, and the flowing balance of the molten steel is broken, so that fluid in the molten steel has more chances to flow to the edge.
Molten steel enters from the stirring inlet 321 and flows out from the stirring outlet 322, during the self-rotation process of the stirring block 32, the molten steel meets the molten steel retained at the turbine 34 when flowing out from the stirring outlet 322 (the turbine 34 rotates to push and flow the fluid in the middle towards the edge of the pipeline), the fluid at the edge of the turbine 34 blocks the fluid at the stirring outlet 322, so that the molten steel in the area forms slow turbulence when flowing (see the molten steel flowing schematic diagram in fig. 5), and the molten steel continuously flows from the middle to the edge to contact with slag on the inner wall of the pipeline.
Therefore, the turbine 34 not only drives the stirring block 32 to rotate, but also has a function of allowing the fluid in the middle to flow outwards, so as to block the fluid flowing out from the stirring outlet 322, so that molten steel turbulence is formed between the stirring outlet 322 and the turbine 34, and inclusions in molten steel continuously move from the middle to the outer surface of the molten steel, so as to fully contact with slag as much as possible.
As shown in fig. 7, a baffle plate 31 is disposed at the inlet of the stirring channel 320, a side hole 310 is disposed at the edge of the baffle plate 31, and the baffle plate 31 blocks the flow of molten steel, so that the molten steel can be more accurately aligned with the stirring inlet 321; then, the side hole 310 of the baffle plate 31 guides the molten steel so that the molten steel flows while being deflected to the outer peripheral side, and then enters the side hole 310.
Meanwhile, as the stirring block 32 rotates, a liquid flow cross section is formed between the side hole 310 and the stirring inlet 321, and the flow cross section is constantly changed along with the rotation of the stirring block 32, so as to break the balance of the flow of the liquid and increase the turbulence type of the flow of the molten steel.
As shown in fig. 9 and 10, the turbulence inlet 321 and the turbulence outlet 322 are both strip-shaped through holes, the turbulence inlet 321 is attached to the edge of the end surface of the turbulence block 32, the turbulence outlets 322 are arranged along the circumference of the end surface of the turbulence block 32, and the turbulence outlets 322 face the center of the turbulence block 32.
The size of the outer end of the turbulence outlet 322 is larger than that of the inner end, so that when the molten steel flows out of the turbulence channel 320, more molten steel flows towards the edge, and the probability of the molten steel contacting slag is increased.
The arrangement of the stirring outlets 322 is the same as that of the bracket 33, so when the stirring outlets 322 are completely aligned with the bracket 33, the stirring outlets 322 are blocked by the bracket 33, and the molten steel flows in the stirring block 32 when rotating, and therefore, by providing the side overflow holes 323 (see fig. 10) on both sides of the stirring outlets 322, the molten steel can flow out of the side overflow holes 323 when the bracket 33 blocks, and interruption of the molten steel flow is avoided.
As shown in fig. 8, the stirring channel 320 is spirally disposed along the axial center of the stirring block 32, the fluid passing through the stirring channel 320 drives the stirring block 32 to automatically twist, and the twisting direction of the stirring block 32 is the same as the twisting direction of the turbine 34, so that the fluid passing through the stirring block 32 and the turbine 34 can drive the stirring block 32 to rotate, and compared with the fluid driven by the turbine 34 alone, the rotation speed of the stirring block 32 can be increased by the simultaneous driving of the stirring block 32 and the turbine 34.
As shown in fig. 11, the slow flow mechanism 4 is used for slowing down the downward impact speed of the molten steel; the flow delaying mechanism 4 includes a main flow passage 45, a horizontal flow delaying baffle wall 40, a flow delaying hole 41, a flow delaying passage 42, and a vertical flow delaying baffle wall 43.
The main flow channel 45 is vertically arranged, the lower part of the main flow channel 45 is aligned with the horizontal buffer flow baffle wall 40, and the horizontal buffer flow baffle wall 40 blocks fluid to prevent molten steel from directly rushing out of the discharge opening 5 vertically downwards; the side wall of the main flow channel 45 is provided with a slow flow hole 41, and the slow flow hole 41 faces the slow flow channel 42 and is horizontally arranged; a vertical baffle wall 43 is positioned within the baffle channel 42, the vertical baffle wall 43 being aligned with the baffle holes 41; the slow flow passage 42 communicates with the discharge port 5.
When the molten steel flows from the main flow passage 45 to the horizontal baffle wall 40, the flow direction of the molten steel is changed from vertical downward to lateral flow (the lateral flow velocity is still higher due to gravity), and after entering the slow flow passage 42 through the slow flow hole 41, the lateral flow of the molten steel is blocked by the vertical baffle wall 43, so that the molten steel restarts to flow downward in the slow flow passage 42 under the action of gravity. The molten steel fluid is blocked by a multiple blocking mode, and meanwhile, the starting point of the downward flowing of the molten steel along the gravity is close to the discharge opening 5, so that the molten steel flowing out of the discharge opening 5 is low in speed, the molten steel is prevented from contacting with a bearing surface to form large sputtering, and the safety is improved. The discharge opening 5 is used for receiving the molten steel flowing out of the slow flow mechanism 4 and discharging the molten steel outwards.
Referring to fig. 11, the height of the slow flow hole 41 is greater than that of the horizontal slow flow baffle wall 40, and the molten steel hitting the horizontal slow flow baffle wall 40 needs to flow back slightly upward to pass through the slow flow hole 41, which is a phenomenon of a large amount of splashing caused by the molten steel directly flowing into the main flow channel 45 at the beginning of slowing down (when only air is present in the pipe), so that by moving the slow flow hole 41 a small distance upward, when the molten steel in the main flow channel 45 directly hits the horizontal slow flow baffle wall 40, the molten steel is instantly changed from a vertical flow to a horizontal flow, the molten steel cannot directly flow into the slow flow hole 41 due to a lateral flow, and the molten steel can enter the slow flow hole 41 only after being decelerated by an upward flow, thereby greatly reducing the problem of an excessive speed of molten steel generated by splashing.
The middle part of the horizontal slow flow baffle wall 40 is provided with a drain hole 44, so that the phenomenon that residues are formed at the horizontal slow flow baffle wall 40 after the fluid in the steel ladle flows completely is avoided.
The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. The utility model provides a ladle subassembly for edulcoration is transported to molten steel, includes ladle (1), outrigger (13), control lever (12), linkage structure (11) and gag lever post (10), ladle (1) bottom is equipped with discharge orifice (14), its characterized in that: the ladle assembly also comprises a cooling shell (6), a cooling pipeline (2), an agitation mechanism (3), a slow flow mechanism (4) and a discharge opening (5), wherein the flow hole (14), the cooling pipeline (2), the agitation mechanism (3), the slow flow mechanism (4) and the discharge opening (5) are sequentially communicated, the cooling shell (6) wraps and seals the cooling pipeline (2), the agitation mechanism (3) and the slow flow mechanism (4), and a flowing cooling liquid is reserved among the cooling shell (6), the cooling pipeline (2), the agitation mechanism (3) and the slow flow mechanism (4),
-a cooling conduit (2) for the molten steel to pass through and reduce the temperature to promote slag adhesion in the conduit wall, the cooled molten steel being fed to the stirring mechanism (3);
-a stirring mechanism (3) for receiving the molten steel and stirring the molten steel to move inclusions precipitated in the molten steel toward the inner wall surface of the passage;
-a flow slowing means (4) for slowing the downward impact of the molten steel;
-a discharge opening (5) for receiving the molten steel from the slow flow mechanism (4) and discharging the molten steel to the outside;
the stirring mechanism (3) comprises a stirring pipe (30), a stirring block (32) and a turbine (34), the turbine (34) and the stirring block (32) are pivoted in the stirring pipe (30) through a support (33), the turbine (34) and the stirring block (32) rotate synchronously, the stirring block (32) comprises a stirring channel (320), a stirring inlet (321) and a stirring outlet (322), and two ends of the stirring channel (320) are connected with the stirring inlet (321) and the stirring outlet (322).
2. The ladle assembly for molten steel transfer impurity removal according to claim 1, characterized in that: the stirring channel (320) is spirally arranged along the axis of the stirring block (32), fluid drives the stirring block (32) to twist when passing through the stirring channel (320), and the twisting direction of the stirring block (32) is consistent with that of the turbine (34).
3. The ladle assembly for molten steel transfer impurity removal according to claim 1, characterized in that: a flow baffle plate (31) is arranged at the inlet of the stirring channel (320), and a side hole (310) is arranged at the edge of the flow baffle plate (31).
4. The ladle assembly for molten steel transfer impurity removal according to claim 3, characterized in that: the stirring inlet (321) and the stirring outlet (322) are strip-shaped through holes, the stirring inlet (321) is attached to the edge of the end face of the stirring block (32), the stirring outlet (322) is arranged along the circumference of the end face of the stirring block (32), and the stirring outlet (322) faces to the center of the stirring block (32).
5. The ladle assembly for molten steel transfer impurity removal according to claim 1, characterized in that: the slow flow mechanism (4) comprises a main flow channel (45), a horizontal slow flow baffle wall (40), a slow flow hole (41), a slow flow channel (42) and a vertical slow flow baffle wall (43);
the main flow channel (45) is vertically arranged, and the lower part of the main flow channel (45) is aligned with the horizontal flow-slowing baffle wall (40);
the side wall of the main flow channel (45) is provided with a slow flow hole (41), and the slow flow hole (41) faces the slow flow channel (42) and is horizontally arranged;
the vertical buffer wall (43) is positioned in the buffer channel (42), and the vertical buffer wall (43) is aligned with the buffer hole (41);
the slow flow channel (42) is communicated with the discharge opening (5).
6. The ladle assembly for molten steel transfer impurity removal according to claim 5, characterized in that: the height of the flow-slowing holes (41) is larger than that of the horizontal flow-slowing baffle wall (40).
7. The ladle assembly for molten steel transfer impurity removal according to claim 6, characterized in that: the middle part of the horizontal flow-slowing baffle wall (40) is provided with a drain hole (44).
8. The ladle assembly for molten steel transfer impurity removal according to claim 1, characterized in that: the cooling pipeline (2) is coiled at the bottom of the steel ladle (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010743530.0A CN111893246B (en) | 2020-07-29 | 2020-07-29 | Steel ladle assembly for transferring and purifying molten steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010743530.0A CN111893246B (en) | 2020-07-29 | 2020-07-29 | Steel ladle assembly for transferring and purifying molten steel |
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| CN111893246A CN111893246A (en) | 2020-11-06 |
| CN111893246B true CN111893246B (en) | 2021-10-01 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09241720A (en) * | 1996-03-11 | 1997-09-16 | Nippon Yakin Kogyo Co Ltd | Ladle refining apparatus |
| CN2623382Y (en) * | 2003-04-22 | 2004-07-07 | 宝钢集团上海第一钢铁有限公司 | Metal liquid impurity cleaner |
| CN104226936A (en) * | 2013-06-19 | 2014-12-24 | 鞍钢股份有限公司 | Device and method for purifying molten steel in tundishes |
| CN110218835A (en) * | 2019-06-06 | 2019-09-10 | 山东钢铁股份有限公司 | The device and smelting process of inclusion removal under a kind of slag interface |
| CN110315060A (en) * | 2018-03-30 | 2019-10-11 | 宝山钢铁股份有限公司 | A kind of flow control formula tundish structure may filter that the field trash in molten steel |
| CN110923394A (en) * | 2019-11-28 | 2020-03-27 | 中冶京诚工程技术有限公司 | Steel-making equipment and steel-making method |
-
2020
- 2020-07-29 CN CN202010743530.0A patent/CN111893246B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09241720A (en) * | 1996-03-11 | 1997-09-16 | Nippon Yakin Kogyo Co Ltd | Ladle refining apparatus |
| CN2623382Y (en) * | 2003-04-22 | 2004-07-07 | 宝钢集团上海第一钢铁有限公司 | Metal liquid impurity cleaner |
| CN104226936A (en) * | 2013-06-19 | 2014-12-24 | 鞍钢股份有限公司 | Device and method for purifying molten steel in tundishes |
| CN110315060A (en) * | 2018-03-30 | 2019-10-11 | 宝山钢铁股份有限公司 | A kind of flow control formula tundish structure may filter that the field trash in molten steel |
| CN110218835A (en) * | 2019-06-06 | 2019-09-10 | 山东钢铁股份有限公司 | The device and smelting process of inclusion removal under a kind of slag interface |
| CN110923394A (en) * | 2019-11-28 | 2020-03-27 | 中冶京诚工程技术有限公司 | Steel-making equipment and steel-making method |
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