Molten steel refining device

Abstract

The invention relates to a molten steel refining device, and relates to the technical field of steelmaking equipment, the molten steel refining device comprises a refining furnace, the refining furnace comprises a furnace body inner container and a furnace body outer wall, the furnace body inner container is fixedly mounted in the furnace body outer wall, and a mounting cavity is formed between the furnace body inner container and the furnace body outer wall; the molten steel vessel is rotationally mounted at the bottom of the furnace body inner container; the first argon blowing mechanism comprises a rotating part, the rotating part is mounted on the molten steel vessel, and the rotating part is used for driving the molten steel vessel to rotate; the first argon storage tank is fixedly mounted on the outer wall of the furnace body; and the first argon gas outlet pipe is fixedly installed on the bottom wall of the molten steel vessel, the first argon gas outlet pipe communicates with the first argon gas storage tank, and the first argon gas outlet pipe communicates with a first argon gas outlet spray head. According to the argon purging device, the argon purging uniformity of the AOD refining furnace can be improved, and the molten steel stirring effect of argon purging is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steelmaking equipment, and particularly relates to a molten steel refining device. BACKGROUND

[0002] Molten steel refining refers to the work of controlling the carbon content in molten steel, eliminating harmful elements such as P, S, O and N in molten steel, retaining or increasing beneficial elements such as Si, Mn, Ni and Cr, and adjusting the proportion between elements to obtain the best performance of molten steel. In the prior art, AOD refining furnace is mainly used for molten steel refining. The AOD refining furnace realizes molten steel refining by blowing argon gas into the molten steel.

[0003] When high-pressure argon gas is used for purging molten steel, local overheating and severe scouring of the AOD refining furnace lining may occur, thereby accelerating the erosion of the furnace lining material and shortening the service life of the AOD refining furnace. At the same time, because the molten steel in the furnace is in a flowing state, the argon gas may not be uniformly distributed during the purging process, resulting in excessive concentration or sparseness in some areas, which reduces the stirring effect and further affects the uniformity of the composition and temperature of the molten steel. SUMMARY

[0004] In order to improve the uniformity of argon gas purging of the AOD refining furnace and improve the stirring effect of argon gas purging on molten steel, the present application provides a molten steel refining device.

[0005] The molten steel refining device provided by the present application adopts the following technical scheme: A molten steel refining device, comprising: A refining furnace, the refining furnace comprises a furnace body inner shell and a furnace body outer wall, the furnace body inner shell is fixedly installed in the furnace body outer wall, and an installation cavity is formed between the furnace body inner shell and the furnace body outer wall; A molten steel basin, the molten steel basin is rotatably installed at the bottom of the furnace body inner shell; A first argon blowing mechanism, the first argon blowing mechanism comprises: A rotating member, the rotating member is installed on the molten steel basin, and the rotating member is used to drive the molten steel basin to rotate; A first argon gas storage tank, the first argon gas storage tank is fixedly installed in the furnace body outer wall; A first argon gas outlet pipe, the first argon gas outlet pipe is fixedly installed on the bottom wall of the molten steel basin, the first argon gas outlet pipe is in communication with the first argon gas storage tank, and a first argon gas outlet nozzle is communicated with the first argon gas outlet pipe.

[0006] Optionally, the rotating member comprises a rotating motor, a fixed end of the rotating motor is installed in the installation chamber, a first gear coaxial with the output end of the rotating motor is fixedly installed, the first gear is connected with a second gear in meshing mode, the second gear is coaxially sleeved and fixedly installed on the steel liquid basin.

[0007] Optionally, the second argon blowing mechanism comprises two groups of argon blowing members, the two groups of argon blowing members are arranged on the inner container of the refining furnace body from top to bottom, and each group of the argon blowing members comprises: a first ring, the first ring is penetratingly and slidingly installed on the inner container of the furnace body; a second argon outlet pipe, the second argon outlet pipe is fixedly installed on the first ring, and a second argon outlet nozzle is communicated with the second argon outlet pipe; a second argon storage tank, the second argon storage tank is fixedly installed in the installation chamber, and the second argon storage tank is communicated with the second argon outlet pipe.

[0008] Optionally, the second argon blowing mechanism further comprises a transmission member and an installation base plate; the installation base plate is fixedly installed in the installation chamber; the transmission member comprises: a first sliding block, the first sliding block is penetratingly and slidingly installed on the inner container of the furnace body, and the first sliding block is fixedly connected with the first ring; a third gear, the third gear is rotatably installed on the installation base plate; a first connecting rod, one end of the first connecting rod is fixedly connected with the third gear; a second connecting rod, one end of the second connecting rod is hingedly connected with the end of the first connecting rod away from the third gear, and the second connecting rod is hingedly connected with the end of one of the first sliding blocks away from the first ring; a third connecting rod, one end of the third connecting rod is hingedly connected with the end of the second connecting rod away from the first connecting rod, and the third connecting rod is hingedly connected with the end of the other first sliding block away from the first ring.

[0009] Optionally, the feedback mechanism comprises: an electric telescopic rod, a fixed end of the electric telescopic rod is fixedly installed on the installation base plate; a rack, the rack is slidingly installed on the installation base plate, a movable end of the electric telescopic rod is fixedly connected with the rack, and the rack is connected with the third gear in meshing mode.

[0010] Optionally, the feedback mechanism further comprises: A liquid level sensor is fixedly installed in the furnace body inner container, and the liquid level sensor is used to detect the liquid level height of molten steel in the furnace body inner container and the steel liquid vessel; A controller is fixedly installed on the furnace body outer wall, and the liquid level sensor and the electric telescopic rod are electrically connected with the controller.

[0011] Optionally, a third argon blowing mechanism is further included, and the third argon blowing mechanism comprises: A second collar is provided and slidably installed on the furnace body inner container; A third argon gas outlet pipe is fixedly installed on the second collar, and a third argon gas outlet nozzle is communicated with the third argon gas outlet pipe, and the third argon gas outlet pipe is communicated with the second argon gas storage tank.

[0012] Optionally, the third argon blowing mechanism further comprises: A second sliding block is provided and slidably installed on the furnace body inner container, and the second sliding block is fixedly connected with the second collar; A fourth connecting rod is hingedly connected with the third connecting rod away from the second connecting rod, and an end of the second sliding block away from the second collar is hingedly connected with the fourth connecting rod.

[0013] Optionally, the inner wall of the steel liquid vessel and the inner wall of the furnace body inner container are both paved with refractory bricks.

[0014] In summary, the present application has at least one of the following beneficial technical effects: 1. When refining molten steel, the molten steel is poured into the furnace body inner container and the steel liquid vessel, and the first argon blowing mechanism is used to continuously blow argon into the molten steel. When the first argon blowing mechanism is working, the motor is rotated to drive the steel liquid vessel to rotate, and the steel liquid vessel is rotated to drive the first argon gas outlet pipe and the first argon gas outlet nozzle to rotate around the output shaft axis of the rotating motor, so that the argon gas sprayed by the first argon gas outlet nozzle can flow uniformly in the molten steel, improving the uniformity of argon sweeping in the AOD refining furnace, improving the vertical mixing degree of the molten steel, and improving the stirring effect of argon sweeping on the molten steel; 2. The second argon gas outlet pipe and the second argon gas outlet nozzle are driven to slide by rotating the third gear, so that the distance between the second argon gas outlet nozzle and the molten steel surface is adjusted. The change of the height of the molten steel surface is avoided, which causes the argon flow of the second argon gas outlet nozzle to be too large or too small. The above operation improves the stirring efficiency of the argon sprayed by the second argon gas outlet nozzle on the molten steel, and avoids the destruction of the slag layer on the surface of the molten steel by the argon sprayed by the second argon gas outlet nozzle; 3. The second ring is always positioned above and close to the molten steel surface. Argon gas is blown into the molten steel surface through the third argon gas nozzle, forming an argon gas protective layer above the molten steel surface. This argon gas protective layer isolates the molten steel from oxygen, preventing the molten steel surface from contacting oxygen and subsequently oxidizing. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a structural cross-sectional view of an embodiment of this application; Figure 3 This is a schematic diagram showing the structure of the furnace inner liner; Figure 4 yes Figure 2 Enlarged view of point A; Figure 5 yes Figure 2 Enlarged view of point B; Figure 6 yes Figure 2 Enlarged view of point C; Figure 7 yes Figure 3 Enlarged view of point D.

[0016] Explanation of reference numerals in the attached figures: 1. Refining furnace; 11. Furnace inner liner; 12. Furnace outer wall; 13. Installation chamber; 2. Liquid steel dish; 3. First argon blowing mechanism; 31. Rotary motor; 32. First argon storage tank; 33. First argon outlet pipe; 331. First argon outlet nozzle; 34. First gear; 35. Second gear; 4. Feedback mechanism; 41. Electric telescopic pole; 42. Rack and pinion; 5. Second argon blowing mechanism; 51. First collar; 52. Second argon gas outlet pipe; 521. Second argon gas outlet nozzle; 53. Second argon gas storage tank; 54. Mounting base plate; 55. First sliding block; 56. Third gear; 57. First connecting rod; 58. Second connecting rod; 59. Third connecting rod; 6. Third argon blowing mechanism; 61. Second collar; 62. Third argon gas outlet pipe; 621. Third argon gas outlet nozzle; 63. Second sliding block; 64. Fourth connecting rod; 7. Refractory bricks. Detailed Implementation

[0017] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0018] This application discloses a steel refining apparatus.

[0019] A steel refining apparatus includes a refining furnace 1, a steel liquid vessel 2, and a first argon blowing mechanism 3.

[0020] The refining furnace 1 includes an inner furnace liner 11 and an outer furnace wall 12. The inner furnace liner 11 is fixedly installed inside the outer furnace wall 12, and an installation chamber 13 is provided between the inner furnace liner 11 and the outer furnace wall 12. A molten steel dish 2 is rotatably installed at the bottom of the inner furnace liner 11. Specifically, it is configured such that a receiving plate is fixedly installed inside the inner furnace liner 11, and the molten steel dish 2 is rotatably installed on the receiving plate, communicating with the inner furnace liner 11. Both the inner wall of the molten steel dish 2 and the inner wall of the inner furnace liner 11 are lined with refractory bricks 7. A first argon blowing mechanism 3 is installed in the installation chamber 13 and is used to blow argon gas into the refining furnace 1.

[0021] The first argon blowing mechanism 3 includes a rotating motor 31, a first argon storage tank 32, a first argon outlet pipe 33, a first gear 34, and a second gear 35.

[0022] The fixed end of the rotating motor 31 is installed in the installation chamber 13. The first gear 34 is coaxially and fixedly installed on the output end of the rotating motor 31. The first gear 34 is meshed with the second gear 35. The second gear 35 is coaxially sleeved and fixedly installed on the steel liquid vessel 2.

[0023] The first argon gas storage tank 32 is fixedly installed inside the outer wall 12 of the furnace body, and the first argon gas outlet pipe 33 is fixedly installed on the bottom wall of the steel liquid vessel 2. The first argon gas outlet pipe 33 is connected to the first argon gas storage tank 32 through a rotary joint. The first argon gas outlet pipe 33 is connected to a first argon gas outlet nozzle 331. Multiple first argon gas outlet nozzles 331 are provided, and each first argon gas outlet nozzle 331 has the same gas output.

[0024] During the refining of molten steel, the molten steel is poured into the inner liner 11 of the furnace and the molten steel dish 2. Argon gas is continuously blown into the molten steel through the first argon blowing mechanism 3. When the first argon blowing mechanism 3 is working, the rotating motor 31 drives the first gear 34 to rotate. The rotation of the first gear 34 drives the second gear 35 to rotate, which in turn drives the molten steel dish 2 to rotate. The rotation of the molten steel dish 2, in turn, drives the first argon gas outlet pipe 33 and the first argon gas outlet nozzle 331 to rotate around the axis of the molten steel dish 2. This allows the argon gas sprayed from the first argon gas outlet nozzle 331 to flow evenly in the molten steel, improving the uniformity of argon gas purging in the molten steel refining device, increasing the vertical mixing degree of the molten steel, and improving the stirring effect of argon gas purging on the molten steel.

[0025] A steel refining apparatus also includes a second argon blowing mechanism 5, which includes two sets of argon blowing components. The two sets of argon blowing components are arranged from top to bottom on the inner liner 11 of the refining furnace 1. Each set of argon blowing components includes a first ring 51, a second argon gas outlet pipe 52, and a second argon gas storage tank 53.

[0026] The first ring 51 is inserted through and slidably installed on the inner liner 11 of the furnace body. The horizontal height of the first ring 51 is always below the molten steel surface. The second argon gas outlet pipe 52 is fixedly installed on the first ring 51. The second argon gas outlet pipe 52 is connected to a second argon gas outlet nozzle 521. Multiple second argon gas outlet nozzles 521 are provided, and each second argon gas outlet nozzle 521 has the same gas output. The second argon gas outlet nozzles 521 of the two sets of argon blowing components are staggered. The second argon gas storage tank 53 is fixedly installed in the installation chamber 13 and is connected to the second argon gas outlet pipe 52.

[0027] Argon gas is blown horizontally into the molten steel through the second argon gas nozzle 521 to improve the horizontal mixing degree of the molten steel and enhance the stirring effect of argon gas purging on the molten steel.

[0028] The second argon blowing mechanism 5 also includes a transmission component and a mounting base plate 54. The mounting base plate 54 is fixedly installed in the mounting chamber 13, and the transmission component is disposed on the mounting base plate 54.

[0029] The transmission components include a first sliding block 55, a third gear 56, a first connecting rod 57, a second connecting rod 58, and a third connecting rod 59.

[0030] The first sliding block 55 is inserted through and slidably mounted on the inner liner 11 of the furnace. The sliding direction of the first sliding block 55 is parallel to the axis of the inner liner 11. The first sliding block 55 is fixedly connected to the first collar 51. The third gear 56 is rotatably mounted on the mounting base plate 54. One end of the first connecting rod 57 is fixedly connected to the third gear 56. One end of the second connecting rod 58 is hinged to the end of the first connecting rod 57 away from the third gear 56. The second connecting rod 58 is hinged to the end of one of the first sliding blocks 55 away from the first collar 51. The hinge point between the first sliding block 55 and the second connecting rod 58 is at the midpoint of the second connecting rod 58. One end of the third connecting rod 59 is hinged to the end of the second connecting rod 58 away from the first connecting rod 57. The third connecting rod 59 is hinged to the end of another first sliding block 55 away from the first collar 51. The hinge point between the first sliding block 55 and the third connecting rod 59 is at the midpoint of the third connecting rod 59.

[0031] Rotating the third gear 56 drives the first connecting rod 57 to rotate around the third gear 56. The rotation of the first connecting rod 57 then drives the second connecting rod 58 to rotate, which in turn drives the third connecting rod 59 to rotate. The rotation of the second and third connecting rods 58 and 59 causes the first sliding block 55 to slide on the furnace inner liner 11. The sliding of the first sliding block 55 then drives the first collar 51 to slide, which in turn drives the second argon gas outlet pipe 52 and the second argon gas outlet nozzle 521 to slide. This adjusts the distance between the second argon gas outlet nozzle 521 and the molten steel surface, preventing excessive or insufficient argon gas flow from the second argon gas outlet nozzle 521 due to changes in the molten steel level. This improves the stirring efficiency of the argon gas from the second argon gas outlet nozzle 521 on the molten steel while preventing the argon gas from damaging the slag layer on the molten steel surface.

[0032] By adjusting the distance between the second argon gas outlet nozzle 521 and the height of the molten steel, the two sets of second argon gas outlet nozzles 521 can always be maintained at the three-eighths position of the total height of the molten steel. This ensures that the height of the second argon gas outlet nozzle 521 is adapted to different molten steel heights, preventing the distance between the argon gas blown from the second argon gas outlet nozzle 521 and the height of the molten steel surface from being too long or too short, which would affect the stirring effect of the argon gas blown from the second argon gas outlet nozzle 521 on the molten steel, thereby improving the stirring efficiency of the argon gas blown from the second argon gas outlet nozzle 521 on the molten steel.

[0033] A steel refining apparatus also includes a feedback mechanism 4, which includes an electric telescopic rod 41 and a rack 42.

[0034] The fixed end of the electric telescopic rod 41 is fixedly installed on the mounting base plate 54, the rack 42 is slidably installed on the mounting base plate 54, the movable end of the electric telescopic rod 41 is fixedly connected to the rack 42, and the rack 42 is meshed with the third gear 56.

[0035] Feedback mechanism 4 also includes a liquid level sensor and a controller.

[0036] The liquid level sensor is fixedly installed inside the furnace inner liner 11. The liquid level sensor is used to detect the liquid level height of molten steel in the furnace inner liner 11 and the molten steel dish 2. The controller is fixedly installed on the outer wall 12 of the furnace. The liquid level sensor and the electric telescopic rod 41 are both electrically connected to the controller.

[0037] The liquid level sensor detects the height of molten steel in the furnace inner liner 11 and the molten steel dish 2, and feeds the detection data back to the controller. The controller processes the molten steel level data and adjusts the length of the electric telescopic rod 41. When the electric telescopic rod 41 is adjusted, it drives the rack 42 to slide, which in turn drives the third gear 56 to rotate. The rotation of the third gear 56 then adjusts the second argon blowing mechanism 5. The feedback mechanism 4 provides timely and high-precision adjustment of the argon blowing mechanism 5, allowing it to adjust according to the molten steel level. This ensures that the height of the second argon gas nozzle 521 is adapted to different molten steel levels, improving the argon blowing effect of the steel refining device.

[0038] A steel refining apparatus also includes a third argon blowing mechanism 6, which includes a second collar 61, a third argon gas outlet pipe 62, a second sliding block 63, and a fourth connecting rod 64.

[0039] The second ring 61 is inserted through and slidably installed on the inner liner 11 of the furnace. The sliding direction of the second sliding block 63 is parallel to the axis of the inner liner 11 of the furnace. The third argon gas outlet pipe 62 is fixedly installed on the second ring 61. The third argon gas outlet pipe 62 is connected to a third argon gas outlet nozzle 621. Multiple third argon gas outlet nozzles 621 are provided, and each third argon gas outlet nozzle 621 has the same gas output. The third argon gas outlet pipe 62 is connected to the second argon gas storage tank 53. The second sliding block 63 is inserted through and slidably installed on the inner liner 11 of the furnace. The second sliding block 63 is fixedly connected to the second ring 61. The fourth connecting rod 64 is hinged to the end of the third connecting rod 59 away from the second connecting rod 58. The end of the second sliding block 63 away from the second ring 61 is hinged to the fourth connecting rod 64. The second sliding block 63 is hinged at the midpoint of the fourth connecting rod 64.

[0040] The second ring 61 is always positioned above and close to the surface of the molten steel. Argon gas is blown into the surface of the molten steel through the third argon gas nozzle 621, forming an argon gas protective layer above the surface of the molten steel. This argon gas protective layer isolates the molten steel from oxygen, preventing the surface of the molten steel from contacting oxygen and subsequently oxidizing.

[0041] The rotation of the third link 59 drives the rotation of the fourth link 64, which in turn drives the second ring 61 to slide. The sliding of the second ring 61, in turn, drives the third argon gas outlet pipe 62 and the third argon gas outlet nozzle 621 to slide, thereby adjusting the distance between the third argon gas outlet nozzle 621 and the molten steel surface. This ensures that the third argon gas outlet nozzle 621 is always close to and above the molten steel surface, while also ensuring that the distance between the third argon gas outlet nozzle 621 and the molten steel surface can be adaptively adjusted according to the amount of molten steel, thus improving the protective effect of the argon gas blown out by the third argon gas outlet nozzle 621 on the molten steel.

[0042] The implementation principle of a steel refining device according to an embodiment of this application is as follows: When refining molten steel, the molten steel is poured into the inner liner 11 of the furnace and the molten steel dish 2, and argon gas is continuously blown into the molten steel through the first argon blowing mechanism 3. When the first argon blowing mechanism 3 is working, the rotating motor 31 drives the molten steel dish 2 to rotate. The rotation of the molten steel dish 2 in turn drives the first argon gas outlet pipe 33 and the first argon gas outlet nozzle 331 to rotate around the output shaft axis of the rotating motor 31, so that the argon gas sprayed by the first argon gas outlet nozzle 331 can flow evenly in the molten steel, thereby improving the uniformity of argon gas purging in the steel refining device, improving the vertical mixing degree of the molten steel, and improving the stirring effect of argon gas purging on the molten steel.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel refining apparatus, characterized in that, include: A refining furnace (1) includes an inner furnace liner (11) and an outer furnace wall (12). The inner furnace liner (11) is fixedly installed inside the outer furnace wall (12), and an installation chamber (13) is provided between the inner furnace liner (11) and the outer furnace wall (12). A molten steel dish (2) is rotatably installed at the bottom of the inner liner (11) of the furnace body; The first argon blowing mechanism (3) includes: A rotating component is mounted on the molten steel dish (2) and is used to drive the molten steel dish (2) to rotate. The first argon gas storage tank (32) is fixedly installed inside the outer wall (12) of the furnace body; The first argon gas outlet pipe (33) is fixedly installed on the bottom wall of the steel liquid vessel (2). The first argon gas outlet pipe (33) is connected to the first argon gas storage tank (32). The first argon gas outlet pipe (33) is connected to the first argon gas nozzle (331).

2. The steel refining apparatus according to claim 1, characterized in that, The rotating component includes a rotating motor (31), the fixed end of which is installed in the mounting chamber (13). A first gear (34) is coaxially and fixedly installed on the output end of the rotating motor (31). The first gear (34) is meshed with a second gear (35), and the second gear (35) is coaxially sleeved and fixedly installed on the molten steel dish (2).

3. The steel refining apparatus according to claim 1, characterized in that, It also includes a second argon blowing mechanism (5), which includes two sets of argon blowing elements. The two sets of argon blowing elements are arranged from top to bottom on the inner liner (11) of the refining furnace (1). Both sets of argon blowing elements include: The first ring (51) is inserted through and slidably mounted on the inner liner (11) of the furnace body; The second argon gas outlet pipe (52) is fixedly installed on the first collar (51), and the second argon gas outlet pipe (52) is connected to the second argon gas outlet nozzle (521). The second argon gas storage tank (53) is fixedly installed in the installation chamber (13) and is connected to the second argon gas outlet pipe (52).

4. A steel refining apparatus according to claim 3, characterized in that, The second argon blowing mechanism (5) also includes a transmission component and a mounting base plate (54); The mounting base plate (54) is fixedly installed in the mounting chamber (13); The transmission component includes: The first sliding block (55) is inserted through and slidably installed on the inner liner (11) of the furnace body, and the first sliding block (55) is fixedly connected to the first collar (51); The third gear (56) is rotatably mounted on the mounting base plate (54); The first connecting rod (57) has one end fixedly connected to the third gear (56); The second link (58) has one end hinged to the end of the first link (57) away from the third gear (56), and the second link (58) is hinged to one of the first sliding blocks (55) away from the first collar (51). The third link (59) is hinged at one end to the end of the second link (58) away from the first link (57), and the third link (59) is hinged to the end of another first sliding block (55) away from the first collar (51).

5. A steel refining apparatus according to claim 4, characterized in that, It also includes a feedback mechanism (4), which comprises: An electric telescopic rod (41) is fixedly mounted on the mounting base plate (54) at its fixed end. A rack (42) is slidably mounted on the mounting base plate (54). The movable end of the electric telescopic rod (41) is fixedly connected to the rack (42). The rack (42) is meshed with the third gear (56).

6. A steel refining apparatus according to claim 5, characterized in that, The feedback mechanism (4) also includes: A liquid level sensor is fixedly installed inside the furnace inner liner (11) and is used to detect the liquid level height of molten steel in the furnace inner liner (11) and the molten steel dish (2). The controller is fixedly installed on the outer wall (12) of the furnace body, and the liquid level sensor and the electric telescopic rod (41) are both electrically connected to the controller.

7. A steel refining apparatus according to claim 4, characterized in that, It also includes a third argon blowing mechanism (6), which includes: The second ring (61) is inserted through and slidably mounted on the inner liner (11) of the furnace body; The third argon gas outlet pipe (62) is fixedly installed on the second collar (61). The third argon gas outlet pipe (62) is connected to the third argon gas outlet nozzle (621). The third argon gas outlet pipe (62) is connected to the second argon gas storage tank (53).

8. A steel refining apparatus according to claim 7, characterized in that, The third argon blowing mechanism (6) also includes: The second sliding block (63) is inserted through and slidably installed on the inner liner (11) of the furnace body, and the second sliding block (63) is fixedly connected to the second collar (61); The fourth link (64) is hinged to the end of the third link (59) away from the second link (58), and the end of the second sliding block (63) away from the second collar (61) is hinged to the fourth link (64).

9. A steel refining apparatus according to claim 1, characterized in that, The inner wall of the molten steel dish (2) and the inner wall of the furnace liner (11) are both lined with refractory bricks (7).

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