Rapid desulfurization equipment for low-carbon aluminum-containing steel LF furnace refining

Abstract

The utility model provides rapid desulfurization equipment for low-carbon aluminum-containing steel LF furnace refining, and relates to the technical field of rapid desulfurization equipment.The rapid desulfurization equipment comprises a mounting frame, a low-carbon aluminum-containing steel LF furnace main body is fixedly mounted at the top of the mounting frame, and a uniform discharging and stirring assembly for desulfurization is arranged above the low-carbon aluminum-containing steel LF furnace main body; a motor is controlled to drive a driving shaft to rotate, so that the driving shaft can drive a stirring rod and a conveying auger to stir and mix molten steel, a storage box is driven to rotate through cooperation of a fixed seat, and a first rotating shaft can be driven to rotate through cooperation of a sun gear, a planetary gear and a gear ring; after the first rotating shaft rotates, the rotating disc can be driven to rotate, so that the material storage box can conveniently discharge materials to multiple positions of the low-carbon aluminum-containing steel LF refining furnace main body, the stirring effect of a stirring rod and a conveying auger on molten steel is good, and the conveying auger can enable the molten steel to be discharged conveniently after stirring is completed.

Description

Technical Field

[0001] This utility model relates to the technical field of rapid desulfurization equipment, and in particular to a rapid desulfurization equipment for refining low-carbon aluminum-containing steel in an LF furnace. Background Technology

[0002] In steel production, low-carbon aluminum steel has excellent properties and is widely used in industries such as automobile manufacturing and construction. However, its production process faces many challenges. Traditional LF furnaces have problems such as poor deoxidation of molten steel, low inclusion removal rate, and large aluminum loss when refining low-carbon aluminum steel. For example, during the deoxidation process, due to the limitations of refining technology and equipment, it is difficult to accurately control the oxygen content in the molten steel at a low level. This not only affects the quality of the steel, but may also lead to problems such as nozzle blockage in the subsequent continuous casting process. In low-carbon aluminum steel, sulfur is a harmful impurity. Sulfur will form iron sulfide (FeS) with iron in the steel. Iron sulfide has a low melting point. During the hot working process of steel (such as rolling and forging), iron sulfide will melt at the grain boundaries, causing the steel to become hot brittle at low temperatures. By desulfurizing in the LF furnace, the formation of iron sulfide can be effectively reduced, the hot working performance of steel can be improved, and the steel is less prone to defects such as cracks in the subsequent forming process, thereby improving the mechanical properties of steel, such as strength and toughness.

[0003] The announcement number CN215668087U discloses a rapid desulfurization device for refining low-carbon aluminum-containing steel in an LF furnace, including a top frame, a sliding rod, a top cover, and a furnace body. The bottom of the furnace body is equipped with support legs, and a liquid outlet valve is installed on the bottom wall of the furnace body. The top cover is installed on the top of the furnace body. The upper end of the sliding rod passes through the top frame and is slidably connected to the top frame. The lower end of the sliding rod passes through the top cover and is slidably connected to the top cover. An anti-detachment block is provided on the lower end of the sliding rod.

[0004] In practice, when desulfurizing molten steel, personnel often directly add slag-forming devices such as fluorite and lime to the inside of the refining furnace and desulfurize the molten steel by stirring. However, the fluorite and lime have already accumulated in one place, resulting in low mixing efficiency and long desulfurization time. Therefore, we propose a rapid desulfurization device for refining low-carbon aluminum steel in an LF furnace. Summary of the Invention

[0005] In view of this, this application provides a rapid desulfurization device for refining low-carbon aluminum-containing steel in an LF furnace, with the aim of solving the above-mentioned technical problems to a certain extent.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A rapid desulfurization device for refining low-carbon aluminum-containing steel in an LF furnace includes a mounting frame, on the top of which the main body of the low-carbon aluminum-containing steel LF refining furnace is fixedly mounted, and above the main body of the low-carbon aluminum-containing steel LF refining furnace is a uniform feeding and stirring component for desulfurization.

[0008] The desulfurization uniform feeding and stirring assembly includes a motor, a drive shaft, a stirring rod, a conveying auger, and a fixed base. The motor is fixedly installed on the top of the low-carbon aluminum-containing steel LF refining furnace body. The drive shaft is fixedly installed on the output end of the motor. The stirring rod is fixedly installed around the outside of the drive shaft. The conveying auger is fixedly installed on the outside of the stirring rod. The fixed base is fixedly installed on the outside of the drive shaft.

[0009] Preferably, a feed pipe is fixedly installed on the top of the low-carbon aluminum-containing steel LF refining furnace body, a sealing cap is threaded on the outer side of the feed pipe, a slide rod is fixedly installed on the top of the low-carbon aluminum-containing steel LF refining furnace body, a discharge baffle is slidably installed on the outer side of the slide rod, a locking handle is rotatably installed on the top of the discharge baffle, a discharge control drive assembly is provided above the desulfurization uniform discharge stirring assembly, and an intermittent uniform discharge mechanism is provided above the discharge control drive assembly.

[0010] Preferably, the desulfurization uniform feeding and stirring assembly further includes a first fixed plate, a sun gear, a first rotating shaft, a planetary gear, and a gear ring. The first fixed plate is fixedly installed on the outside of the drive shaft, the sun gear is fixedly installed on the outside of the drive shaft, the first rotating shaft is rotatably installed on the top of the first fixed plate, the planetary gear is fixedly installed on the outside of the rack, the sun gear and the planetary gear mesh with each other, and the gear ring is fixedly installed on the inside of the low-carbon aluminum-containing steel LF refining furnace body, the planetary gear and the gear ring mesh with each other.

[0011] By adopting the above technical solution, the motor is controlled to drive the drive shaft to rotate, so that the drive shaft can drive the stirring rod and the conveying auger to stir and mix the molten steel. This makes it easier for the storage bin to discharge the material to multiple positions on the main body of the low-carbon aluminum-containing steel LF refining furnace. The stirring rod and the conveying auger have a good stirring effect on the molten steel, and the conveying auger makes it more convenient to discharge the molten steel after stirring.

[0012] Preferably, the material feeding control drive assembly includes a storage bin, a limiting frame, a turntable, a control protrusion, and a guide rod. The storage bin is fixedly installed on one side of the fixed base, the limiting frame is fixedly installed on one side of the storage bin, the turntable is fixedly installed on the top of the first rotating shaft, the control protrusion is fixedly installed on the top of the turntable, and the guide rod is slidably installed on the inner side of the limiting frame.

[0013] Preferably, the feeding control drive assembly further includes a connecting control block, a second fixing plate, and a rack. The connecting control block is fixedly installed on one side of the guide moving rod, the second fixing plate is fixedly installed on one side of the storage box, the rack is slidably installed on one side of the second fixing plate, and the rack is fixedly installed on one side of the connecting control block.

[0014] By adopting the above technical solution, the rotation of the discharge baffle facilitates the intermittent feeding of the device, and after the storage box rotates, it can evenly add fluorite and lime to the inner side of the low carbon aluminum steel LF refining furnace body. Due to the uniform and intermittent feeding of a large amount of fluorite and lime, the mixing efficiency of molten steel with fluorite and lime can be high, thereby improving the desulfurization efficiency.

[0015] Preferably, the intermittent uniform feeding mechanism includes a second rotating shaft, a discharge baffle, a transmission gear, and a fixing bolt. The second rotating shaft is rotatably mounted inside the storage box, the discharge baffle is disposed inside the second rotating shaft, the fixing bolt is threadedly mounted inside the discharge baffle and the second rotating shaft, and the transmission gear is fixedly mounted outside the second rotating shaft, and the transmission gear meshes with a rack.

[0016] Preferably, the top of the low-carbon aluminum-containing steel LF refining furnace body is provided with a storage groove, the slide rod is fixedly installed on one side of the inner wall of the storage groove, a plurality of springs are fixedly installed on one side of the inner wall of the storage groove, the springs are fixedly installed on one side of the discharge baffle, a locking rod is fixedly installed on the top of the low-carbon aluminum-containing steel LF refining furnace body, a slot is provided on one side of the locking handle, and the locking rod and the slot fit together.

[0017] Preferably, a limiting groove is provided on one side of the limiting frame, and a guide moving rod is slidably installed inside the limiting groove. A control groove is provided on the top of the guide moving rod, and the control protrusion fits into the control groove.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] (1) The present invention provides a rapid desulfurization device for refining low-carbon aluminum steel in an LF furnace. By setting a uniform feeding and stirring component for desulfurization, the motor drives the drive shaft to rotate, so that the drive shaft can drive the stirring rod and the conveying auger to stir and mix the molten steel. This makes it easier for the storage box to feed the material to multiple positions on the main body of the low-carbon aluminum steel LF refining furnace. The stirring rod and the conveying auger have a good stirring effect on the molten steel, and the conveying auger makes it more convenient to feed the molten steel after stirring.

[0020] (2) The present invention provides a rapid desulfurization device for refining low-carbon aluminum steel in an LF furnace. Through the setting of the feeding control drive component and the intermittent uniform feeding mechanism, the rack can drive the second rotating shaft and the discharge baffle to rotate through the transmission gear after the rack moves. The rotation of the discharge baffle facilitates the intermittent feeding of the device. After the storage box rotates, it can uniformly add fluorite and lime to the inner side of the main body of the low-carbon aluminum steel LF refining furnace. Due to the uniform and intermittent feeding of more fluorite and lime, the mixing efficiency of molten steel with fluorite and lime can be higher, thereby improving the desulfurization efficiency.

[0021] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a rapid desulfurization device for refining low-carbon aluminum-containing steel in an LF furnace, as proposed in this utility model.

[0023] Figure 2 This is a schematic diagram showing a three-dimensional cross-sectional view of a rapid desulfurization device for refining low-carbon aluminum-containing steel in an LF furnace according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of a three-dimensional view of the structure of the explosive portion of a rapid desulfurization device for refining low-carbon aluminum-containing steel in an LF furnace according to an embodiment of this application;

[0025] Figure 4 This diagram shows a three-dimensional view of the bottom section of a rapid desulfurization device for refining low-carbon aluminum-containing steel in an LF furnace according to an embodiment of this application.

[0026] Figure 5 This is a schematic diagram of a three-dimensional view of the structure of the explosive portion of a rapid desulfurization device for refining low-carbon aluminum-containing steel in an LF furnace according to an embodiment of this application;

[0027] Figure 6 For this Figure 5 A magnified structural diagram of part A in the diagram.

[0028] Figure label:

[0029] 1. Uniform feeding and stirring assembly for desulfurization; 2. Feeding control and drive assembly; 3. Intermittent uniform feeding mechanism; 4. Mounting frame; 5. Main body of low-carbon aluminum-containing steel LF refining furnace; 6. Feeding pipe; 7. Sealing cover; 8. Sliding rod; 9. Feeding baffle; 10. Locking handle;

[0030] 11. Motor; 12. Drive shaft; 13. Stirring rod; 14. Conveying auger; 15. Fixed base; 16. First fixed plate; 17. Sun gear; 18. First rotating shaft; 19. Planetary gear; 20. Gear ring;

[0031] 21. Storage bin; 22. Limiting frame; 23. Turntable; 24. Control protrusion; 25. Guide moving rod; 26. Connecting control block; 27. Second fixing plate; 28. Rack and pinion;

[0032] 30. Second rotating shaft; 31. Discharge baffle; 32. Transmission gear; 33. Locking rod; 34. Spring; 35. Fixing bolt. Detailed Implementation

[0033] To further understand the invention content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings;

[0034] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0035] refer to Figure 1-6 A rapid desulfurization device for refining low-carbon aluminum-containing steel LF furnace includes a mounting frame 4, a low-carbon aluminum-containing steel LF refining furnace body 5 is fixedly installed on the top of the mounting frame 4, and a uniform feeding and stirring component 1 for desulfurization is set above the low-carbon aluminum-containing steel LF refining furnace body 5.

[0036] The desulfurization uniform feeding and stirring assembly 1 includes a motor 11, a drive shaft 12, a stirring rod 13, a conveying auger 14, and a fixed base 15. The motor 11 is fixedly installed on the top of the low-carbon aluminum-containing steel LF refining furnace body 5, the drive shaft 12 is fixedly installed on the output end of the motor 11, the stirring rod 13 is fixedly installed around the outside of the drive shaft 12, the conveying auger 14 is fixedly installed on the outside of the stirring rod 13, and the fixed base 15 is fixedly installed on the outside of the drive shaft 12.

[0037] In this embodiment, a feed pipe 6 is fixedly installed on the top of the low-carbon aluminum-containing steel LF refining furnace body 5, a sealing cap 7 is threaded on the outside of the feed pipe 6, a slide rod 8 is fixedly installed on the top of the low-carbon aluminum-containing steel LF refining furnace body 5, a discharge baffle 9 is slidably installed on the outside of the slide rod 8, a locking handle 10 is rotatably installed on the top of the discharge baffle 9, a discharge control drive assembly 2 is provided above the desulfurization uniform discharge stirring assembly 1, and an intermittent uniform discharge mechanism 3 is provided above the discharge control drive assembly 2.

[0038] In this embodiment, the desulfurization uniform feeding and stirring assembly 1 further includes a first fixed plate 16, a sun gear 17, a first rotating shaft 18, a planetary gear 19, and a gear ring 20. The first fixed plate 16 is fixedly installed on the outside of the drive shaft 12, the sun gear 17 is fixedly installed on the outside of the drive shaft 12, the first rotating shaft 18 is rotatably installed on the top of the first fixed plate 16, the planetary gear 19 is fixedly installed on the outside of the rack 28, and the sun gear 17 and the planetary gear 19 mesh with each other. The gear ring 20 is fixedly installed on the inside of the low-carbon aluminum-containing steel LF refining furnace body 5, and the planetary gear 19 and the gear ring 20 mesh with each other. The sun gear 17, the planetary gear 19, and the gear ring 20 are all existing technologies, which enable the planetary gear 19 to rotate, thereby enabling the sun gear 17 to drive the upper turntable 23 to rotate.

[0039] In this embodiment, the material feeding control drive assembly 2 includes a storage bin 21, a limiting frame 22, a turntable 23, a control protrusion 24, and a guide moving rod 25. The storage bin 21 is fixedly installed on one side of the fixed base 15, the limiting frame 22 is fixedly installed on one side of the storage bin 21, the turntable 23 is fixedly installed on the top of the first rotating shaft 18, the control protrusion 24 is fixedly installed on the top of the turntable 23, and the guide moving rod 25 is slidably installed on the inner side of the limiting frame 22.

[0040] In this embodiment, the feeding control drive assembly 2 further includes a connecting control block 26, a second fixing plate 27, and a rack 28. The connecting control block 26 is fixedly installed on one side of the guide moving rod 25, the second fixing plate 27 is fixedly installed on one side of the storage box 21, the rack 28 is slidably installed on one side of the second fixing plate 27, and the rack 28 is fixedly installed on one side of the connecting control block 26. In this embodiment, the intermittent uniform feeding mechanism 3 includes a second rotating shaft 30, a discharge baffle 31, a transmission gear 32, and a fixing bolt 35. The second rotating shaft 30 is rotatably installed on the inner side of the storage box 21, the discharge baffle 31 is disposed on the inner side of the second rotating shaft 30, the fixing bolt 35 is threadedly installed on the inner side of the discharge baffle 31 and the second rotating shaft 30, and the transmission gear 32 is fixedly installed on the outer side of the second rotating shaft 30. The transmission gear 32 meshes with the rack 28.

[0041] In this embodiment, a storage groove is provided on the top of the low-carbon aluminum-containing steel LF refining furnace body 5. A sliding rod 8 is fixedly installed on the inner wall of one side of the storage groove. Multiple springs 34 are fixedly installed on the inner wall of one side of the storage groove. The springs 34 are fixedly installed on one side of the material discharge baffle 9. A locking rod 33 is fixedly installed on the top of the low-carbon aluminum-containing steel LF refining furnace body 5. A slot is provided on one side of the locking handle 10. The locking rod 33 and the slot fit together. The slot makes it easy for the locking handle 10 to be engaged above the locking rod 33, making it more convenient and faster for the staff to add materials to the inside of the storage box 21.

[0042] In this embodiment, a limiting groove is provided on one side of the limiting frame 22, and the guide moving rod 25 is slidably installed inside the limiting groove. A control groove is provided on the top of the guide moving rod 25, and the control protrusion 24 fits into the control groove. After the turntable 23 drives the control protrusion 24 to rotate, the guide moving rod 25 can perform reciprocating linear motion, so that the guide moving rod 25 can drive the connecting control block 26 to control the rack 28, so that the rack 28 can move. Moreover, the limiting frame 22, the guide moving rod 25, and the rack 28 are located on the same straight line, so that the device is not prone to interference.

[0043] The specific operation is as follows: molten steel is added from the inside of the feed pipe 6. When desulfurizing the molten steel, the locking handle 10 can be pulled to slide open the discharge baffle 9, locking the locking handle 10 above the locking rod 33, making it convenient for the staff to add the fluorite and lime required for desulfurization to the top of the storage box 21. After the feeding is completed, the discharge baffle 9 can be closed, and the control motor 11 can drive the drive shaft 12 to rotate, so that the drive shaft 12 can drive the stirring rod 13 and the conveying auger 14 to stir and mix the molten steel. Through the cooperation of the fixed seat 15, the storage box 21 is driven to rotate, and through the cooperation of the sun gear 17, planetary gear 19 and gear ring 20, the first rotating shaft 18 can be driven to rotate. After the rotating shaft 18 rotates, it can drive the turntable 23 to rotate. The turntable 23 can drive the guide moving rod 25 to reciprocate linearly through the control protrusion 24 below. Thus, the guide moving rod 25 can drive the rack 28 to move position through the connecting control block 26. After the rack 28 moves, it can drive the second rotating shaft 30 and the discharge baffle 31 to rotate through the transmission gear 32. The rotation of the discharge baffle 31 facilitates the intermittent feeding of the device. After the storage box 21 rotates, it can evenly add fluorite and lime to the inner side of the low carbon aluminum steel LF refining furnace body 5. Due to the uniform and intermittent feeding of a large amount of fluorite and lime, the mixing efficiency of molten steel with fluorite and lime can be high, thereby improving the desulfurization efficiency.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0046] This patent application relates to a "rapid desulfurization device for refining low-carbon aluminum-containing steel in an LF furnace." The technical problem it aims to solve is that "during the desulfurization of molten steel, personnel often directly add slag-forming devices such as fluorite and lime to the inside of the refining furnace, using stirring to desulfurize the steel. However, the fluorite and lime accumulate in one place, resulting in low mixing efficiency and a long desulfurization time." The specification states that "the sun gear 17 meshes with the first rotating shaft 18." [It is unclear how the sun gear 17 can mesh with the first rotating shaft 18]. Those skilled in the art cannot solve the problem this invention aims to address using this method, making it impossible to implement the technical solution based on the specification. Therefore, it does not comply with Article 26, Paragraph 3 of the Patent Law.

Claims

1. A rapid desulphurization plant for LF furnace refining of low carbon aluminium containing steels, characterized by, The utility model relates to a low -carbon aluminum -containing steel LF refining furnace main part (5) is fixedly installed to the top of mounting frame (4), and the upper portion of low -carbon aluminum -containing steel LF refining furnace main part (5) is provided with even discharging and stirring subassembly (1) for desulfurization, and the utility model relates to even discharging and stirring subassembly (1) for desulfurization includes motor (11), drive shaft (12), stirring rod (13), conveying dragon (14) and fixed base (15), and motor (11) is fixedly installed at the top of low -carbon aluminum -containing steel LF refining furnace main part (5), drive shaft (12) is fixedly installed at the output of motor (11), stirring rod (13) is fixedly installed at the outside one week of drive shaft (12), conveying dragon (14) is fixedly installed at the outside of stirring rod (13), and fixed base (15) is fixedly installed at the outside of drive shaft (12). The top of low -carbon aluminum -containing steel LF refining furnace main part (5) is fixedly installed with a feeding pipe (6), the outer side of the feeding pipe (6) is screw-mounted with a sealing cover (7), the top of the low -carbon aluminum -containing steel LF refining furnace main part (5) is fixedly installed with a slide rod (8), the outer side of the slide rod (8) is slidingly installed with a discharging baffle (9), the top of the discharging baffle (9) is rotatably installed with a locking handle (10), the upper portion of the even discharging and stirring subassembly (1) for desulfurization is provided with a discharging control driving assembly (2), and the upper portion of the discharging control driving assembly (2) is provided with an intermittent even discharging mechanism (3). The even discharging and stirring subassembly (1) for desulfurization further includes a first fixed plate (16), a sun gear (17), a first rotating shaft (18), a planetary gear (19), and a gear ring (20). The first fixed plate (16) is fixedly installed on the outside of the drive shaft (12). The sun gear (17) is fixedly installed on the outside of the drive shaft (12). The first rotating shaft (18) is rotatably installed on the top of the first fixed plate (16). The planetary gear (19) is fixedly installed on the outside of the rack (28). The sun gear (17) and the planetary gear (19) are engaged. The gear ring (20) is fixedly installed on the inside of the low -carbon aluminum -containing steel LF refining furnace main part (5). The planetary gear (19) and the gear ring (20) are engaged.

2. A rapid desulphurization apparatus for LF furnace refining of low carbon Al-killed steel according to claim 1, characterized in that, The discharging control driving assembly (2) includes a storage box (21), a limiting frame (22), a rotating disc (23), a control protrusion (24), and a guide moving rod (25). The storage box (21) is fixedly installed on one side of the fixed base (15). The limiting frame (22) is fixedly installed on one side of the storage box (21). The rotating disc (23) is fixedly installed on the top of the first rotating shaft (18). The control protrusion (24) is fixedly installed on the top of the rotating disc (23). The guide moving rod (25) is slidingly installed on the inside of the limiting frame (22).

3. A rapid desulphurization apparatus for LF furnace refining of low carbon Al-killed steel according to claim 1, characterized in that, ​ 4. A rapid desulphurization apparatus for LF furnace refining of low carbon Al-killed steel according to claim 2, characterized in that, ​ 5. A rapid desulphurization apparatus for LF furnace refining of low carbon Al-killed steel according to claim 2, characterized in that, The blanking control driving assembly (2) further comprises a connecting control block (26), a second fixed plate (27) and a rack (28), the connecting control block (26) is fixedly installed on one side of the guide moving rod (25), the second fixed plate (27) is fixedly installed on one side of the storage box (21), and the rack (28) is slidingly installed on one side of the second fixed plate (27).

6. A rapid desulphurization apparatus for LF furnace refining of low carbon Al-killed steel according to claim 2, characterized in that, The intermittent uniform blanking mechanism (3) comprises a second rotating shaft (30), a discharge baffle (31), a transmission gear (32) and a fixing bolt (35), the second rotating shaft (30) is rotatably installed on the inner side of the storage box (21), the discharge baffle (31) is arranged on the inner side of the second rotating shaft (30), the fixing bolt (35) is threadedly installed on the inner sides of the discharge baffle (31) and the second rotating shaft (30), the transmission gear (32) is fixedly installed on the outer side of the second rotating shaft (30), and the transmission gear (32) is engaged with the rack (28).

7. A rapid desulphurization apparatus for LF furnace refining of low carbon Al-killed steel according to claim 2, characterized in that, The low-carbon aluminum-containing steel LF refining furnace body (5) is provided with a receiving groove on the top, the sliding rod (8) is fixedly installed on the inner wall of one side of the receiving groove, a plurality of springs (34) are fixedly installed on the inner wall of one side of the receiving groove, the spring (34) is fixedly installed on one side of the blanking baffle (9), the low-carbon aluminum-containing steel LF refining furnace body (5) is fixedly installed with a locking rod (33) on the top, one side of the locking handle (10) is provided with a clamping groove, and the locking rod (33) and the clamping groove are attached.

8. A rapid desulphurization apparatus for LF furnace refining of low carbon Al-killed steel according to claim 4, characterized in that, One side of the limiting frame (22) is provided with a limiting sliding groove, the guide moving rod (25) is slidingly installed on the inner side of the limiting sliding groove, the top of the guide moving rod (25) is provided with a control groove, and the control convex block (24) is attached to the control groove.

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