Continuous casting and rolling apparatus for aluminum sheet production

Abstract

The application belongs to the technical field of aluminum plate and aims to provide a continuous casting and rolling equipment for aluminum plate production, which solves the problem of production discontinuity caused by the easy clogging of the filter box during the continuous casting and rolling of the aluminum plate, and comprises a shell, a partition plate is arranged in the shell, the partition plate divides the inner cavity of the shell into a filter cavity and a slag discharge cavity, a driving unit is arranged on the partition plate, a driven unit is arranged on the side of the filter cavity away from the partition plate, a filter cartridge is arranged between the driving unit and the driven unit, the driving unit and the driven unit can drive the filter cartridge to rotate around the axis of the filter cartridge, and an auger is arranged on the inner wall of the filter cartridge; a feeding pipe is fixed to the shell outside the driven unit, the feeding pipe penetrates through the driven unit and extends to the filter cartridge, a discharge port is formed in the side wall of the filter cavity, the bottom of the discharge port is higher than the lowest point of the inner wall of the filter cartridge, the driving unit penetrates through the slag discharge cavity and extends to the other side of the shell and is provided with a pulley, the driving unit can convey the solids in the filter cartridge to the slag discharge cavity when rotating, and a slag discharge port is arranged at the bottom of the slag discharge cavity.

Description

Technical Field

[0001] This invention belongs to the field of aluminum plate technology, and particularly relates to continuous casting and rolling equipment for aluminum plate production. Background Technology

[0002] In the aluminum plate casting and rolling production process, the amount of impurities in the molten aluminum is a key factor affecting the quality of the finished plate. Therefore, as the core purification equipment, the filtration effect and filtration status of the filter box directly determine the output quality and production efficiency of the casting and rolling production line. However, in actual casting and rolling production applications, existing filter boxes are prone to clogging of filter plates or filter elements. Filter residue in the molten aluminum accumulates on the filter surface, causing blockage of the filter channel. Therefore, frequent shutdowns are required during production to scrape and clean the residue. Each shutdown not only causes the molten aluminum to solidify and waste energy, but also interrupts the continuous operation of the production line, reducing production efficiency. Secondly, the current filter components have low utilization rates. Due to the unidirectional flow channel design of the molten aluminum, the material-facing side of the filter plate is subjected to high-speed scouring of the molten aluminum and continuous impact from inclusions, which easily leads to wear and clogging problems. Meanwhile, the non-material-facing side of the filter plate is always in an inefficient working state because the molten aluminum flow rate is slow or even there is no liquid flow. The overall utilization rate is insufficient, which not only greatly reduces the filtration effect, but also significantly shortens the overall life of the filter plate due to excessive wear in certain areas, increasing the replacement frequency and operating costs of filter components. Therefore, developing a filtration device that can optimize the distribution of molten aluminum filtration, avoid local clogging and wear of filtration components, and improve filtration efficiency and component utilization has become an urgent technical problem to be solved in the field of continuous casting and rolling of molten aluminum. Summary of the Invention

[0003] The purpose of this invention is to provide a continuous casting and rolling equipment for aluminum plate production, in order to solve the problem that the filter box is easily clogged during continuous casting and rolling of aluminum plates, causing production discontinuity.

[0004] The technical solution includes a shell with a partition inside, which divides the inner cavity of the shell into a filtration chamber and a slag discharge chamber. An active unit is provided on the partition, and a driven unit is provided on the side of the filtration chamber away from the partition. A filter cylinder is provided between the active and driven units. The active and driven units can drive the filter cylinder to rotate around its own axis. An auger is provided on the inner wall of the filter cylinder. A feed pipe is fixed on the outer shell of the driven unit. The bottom of the feed pipe passes through the driven unit and extends into the filter cylinder. A discharge port is opened on the side wall of the filtration chamber, and the bottom of the discharge port is higher than the lowest point of the inner wall of the filter cylinder. The other side of the active unit passes through the slag discharge chamber and extends to the other side of the shell, and is provided with a pulley. When the active unit rotates, it can transport the solids in the filter cylinder to the slag discharge chamber. A slag discharge port is provided at the bottom of the slag discharge chamber.

[0005] In the above or some embodiments, both the active unit and the driven unit include a hollow shaft. One end of the hollow shaft is located outside the housing, and the other end extends into the filter chamber and is welded with a disc. The inner cavity of the hollow shaft passes through the disc and extends into the filter cartridge. The distance between the two hollow shafts is greater than the length of the filter cartridge. Two bearing bushes are provided on the side of the disc facing the filter cartridge. The inner wall of the bearing bushes fits against the outer wall of the filter cartridge, and the central angle corresponding to the bearing bushes is a flat angle. One bearing bush is welded to the disc, and the other bearing bush is connected to the disc by bolts. The width of the bearing bushes is greater than the length of the hollow shaft extending into the filter cartridge. In use, removing one of the bearing bushes allows the filter cartridge to be removed from or installed between the active unit and the driven unit.

[0006] In the above or some embodiments, the housing and partition are provided with through holes. The side of the through hole facing the filter cavity is provided with a conical surface, and the large-diameter end of the conical surface faces the filter cartridge. The hollow shaft is connected to the end of the through hole away from the conical surface through a bearing. An annular groove is provided on the conical surface, and an annular groove is provided on the outer wall of the hollow shaft. The groove is located between the groove and the bearing. Thus, when the active unit and the driven unit drive the filter cartridge to rotate, the aluminum liquid attached to the outer wall of the hollow shaft can drip from the groove onto the conical surface, and the aluminum liquid sliding down the inner wall of the filter cavity can drip from the groove. This prevents the aluminum liquid from flowing along the inner wall of the filter cavity or the outer wall of the hollow shaft to the bearing, which would cause the bearing to be unable to rotate after the aluminum liquid solidifies.

[0007] In the above or some embodiments, the hollow shaft in the active unit is sealed at both ends, and one end of the hollow shaft extends through the slag discharge chamber to the outside of the shell and is connected to the pulley. An arc-shaped plate is welded to the side of the disc facing the filter cylinder. The generatrix of the arc-shaped plate is parallel to the axis of the filter cylinder. The width of the arc-shaped plate is less than the length of the hollow shaft extending into the filter cylinder. The projection area of ​​the arc-shaped plate on the outer wall of the hollow shaft is set as a through groove. Multiple square grooves penetrating the inner wall are evenly distributed on the circumference of the side wall of the hollow shaft in the slag discharge chamber. A spiral plate is welded to the inner wall of the hollow shaft. The spiral plate rotates in the same direction as the auger. When the active unit rotates, the arc-shaped plate can lift the aluminum slag in the filter cylinder upward. The aluminum slag enters the inner cavity of the hollow shaft from the through groove and falls into the slag discharge chamber from the square groove under the push of the spiral plate.

[0008] In the above or some embodiments, a sealing cover is provided on the outer wall of the housing away from the partition. The sealing cover is a square box with one end open. The sealing cover is fixed to the housing by bolts. A relief groove is opened on the top of the sealing cover. The feed pipe is a bent pipe. The outer wall of the feed pipe on the outside of the housing is welded to the relief groove. The end of the feed pipe inside the filter screen is the lowest point on the feed pipe. Thus, continuous feeding is achieved under the premise of sealing the housing, and no aluminum liquid remains in the inner cavity of the feed pipe.

[0009] In the above or some embodiments, the side wall of the filter chamber is provided with a drain port, the bottom of the drain port is flush with the bottom surface of the filter chamber, and a sealing plug is provided inside the drain port; before filtration begins, the drain port is sealed with the sealing plug, so that the aluminum liquid in the shell rises and is discharged from the outlet. After filtration is completed, the sealing plug is opened to completely discharge the aluminum liquid in the shell.

[0010] In the above or some embodiments, the upper end of the housing is open, and a cover plate is provided on the top of the housing. An air inlet pipe is welded to the cover plate and runs through both sides of the cover plate. Multiple nozzles are connected to the air inlet pipe on the inner side of the housing, and the air outlet of the nozzle is facing the filter cartridge. When in use, the outlet pipe of the external nitrogen source is connected to the air inlet pipe, and air is blown back onto the filter cartridge through the nozzle. This can prevent the aluminum liquid in the housing from contacting the air and allow the nitrogen to escape from the outlet to the next process, thus extending the protection time of the aluminum liquid by the nitrogen.

[0011] In the above or some embodiments, the inner wall of the shell is provided with a rock wool insulation layer, the inner side of the rock wool insulation layer is provided with refractory bricks, and a nickel-chromium heating wire is provided between the rock wool insulation layer and the refractory bricks; thereby heating the aluminum liquid in the shell and avoiding excessive cooling of the aluminum liquid in the shell.

[0012] In the above or some embodiments, a baffle is provided on the outside of the slag discharge port by bolts.

[0013] This technical solution has the following technical effects: 1. The filter cartridge of this device can rotate continuously around its own axis. With the backwashing effect of the nitrogen nozzle, it can effectively prevent the filter holes from being blocked by aluminum liquid impurities. Furthermore, the auger can push the impurities to the slag discharge chamber through the aluminum liquid. The arc plate and spiral plate transport the impurities to the slag discharge chamber for centralized discharge. No machine shutdown is required for cleaning throughout the process, ensuring continuous operation of the casting and rolling production line. This not only improves production efficiency but also avoids the waste of aluminum liquid solidification and energy loss caused by replacing filter elements.

[0014] 2. Compared with the fixed filter plates or filter cylinders in the prior art, the filter cylinder of this device can be rotated by external power under the action of the active unit, so that the entire side wall of the filter cylinder participates in filtration. In addition, the auger installed in the filter cylinder can push the aluminum liquid to flow away from the feed pipe. This changes the situation of excessive local wear, insufficient utilization of the filter surface and short life caused by the existing fixed feed and filter components, and can further reduce the replacement frequency of filter components.

[0015] 3. While backwashing the filter cartridge, the nozzle of this device can also fill the shell with nitrogen to protect the molten aluminum inside the shell from oxidation and reduce the quality loss of the molten aluminum caused by oxidation. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention; Figure 2This is a diagram of the internal structure of the housing after the cover plate has been removed. Figure 3 This is a top sectional view of the filter cartridge axis of the present invention; Figure 4 This is a schematic diagram of the assembly of the active unit, the driven unit, and the housing of the present invention; Figure 5 This is a part drawing of the housing of the present invention; Figure 6 This is a perspective view of the active unit of the present invention; Figure 7 This is an assembly diagram of the feed pipe and sealing cover of the present invention; Figure 8 This is a schematic diagram of the cover plate of the present invention; Figure 9 This is a schematic diagram of the assembly of the housing and the hollow shaft inside the driven unit of the present invention; Legend: 1. Shell; 2. Partition; 3. Filter chamber; 4. Slag discharge chamber; 5. Active unit; 6. Driven unit; 7. Filter cartridge; 8. Screw conveyor; 9. Feed pipe; 10. Discharge port; 11. Pulley; 12. Slag discharge port; 13. Hollow shaft; 14. Disc; 15. Bearing; 16. Through hole; 17. Conical surface; 18. Groove; 19. Settling tank; 20. Arc plate; 21. Through groove; 22. Square groove; 23. Spiral plate; 24. Sealing cover; 25. Drain port; 26. Cover plate; 27. Air inlet pipe; 28. Nozzle; 29. ​​Baffle. Detailed Implementation

[0017] The following is combined with Figures 1 to 9 The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] A continuous casting and rolling equipment for aluminum plate production includes a shell 1. A partition 2 is provided inside the shell 1, which divides the inner cavity of the shell 1 into a filter chamber 3 and a slag discharge chamber 4. An active unit 5 is provided on the partition 2. A driven unit 6 is provided on the side of the filter chamber 3 away from the partition 2. A filter cylinder 7 is provided between the active unit 5 and the driven unit 6. An auger 8 is provided on the inner wall of the filter cylinder 7. Both the active unit 5 and the driven unit 6 include a hollow shaft 13. One end of the hollow shaft 13 is located outside the housing 1, and the other end extends into the filter chamber 3 and is welded with a disc 14. The inner cavity of the hollow shaft 13 passes through the disc 14 and extends into the filter cartridge 7. The distance between the two hollow shafts 13 is greater than the length of the filter cartridge 7. Two bearings 15 are provided on the side of the disc 14 facing the filter cartridge 7. The inner wall of the bearing 15 is in contact with the outer wall of the filter cartridge 7, and the central angle corresponding to the bearing 15 is a flat angle. One bearing 15 is welded to the disc 14, and the other bearing 15 is connected to the disc 14 by bolts. The width of the bearing 15 is greater than the length of the hollow shaft 13 extending into the filter cartridge 7. The hollow shaft 13 inside the active unit 5 is sealed at both ends. One end of the hollow shaft 13 extends through the slag discharge chamber 4 to the outside of the shell 1 and is connected to a pulley 11. An arc plate 20 is welded to the side of the disc 14 facing the filter cylinder 7. The generatrix of the arc plate 20 is parallel to the axis of the filter cylinder 7. The width of the arc plate 20 is less than the length of the hollow shaft 13 extending into the filter cylinder 7. The projection area of ​​the arc plate 20 on the outer wall of the hollow shaft 13 is set as a through groove 21. Multiple square grooves 22 that penetrate the inner wall are evenly distributed on the side wall of the hollow shaft 13 inside the slag discharge chamber 4. A spiral plate 23 is welded to the inner wall of the hollow shaft 13. The spiral direction of the spiral plate 23 is the same as that of the auger 8. Both the housing 1 and the partition 2 have through holes 16. The side of the through hole 16 facing the filter chamber 3 is set as a conical surface 17, and the large diameter end of the conical surface 17 faces the filter cartridge 7. The hollow shaft 13 is connected to the end of the through hole 16 away from the conical surface 17 through a bearing. The conical surface 17 has an annular groove 18. The outer wall of the hollow shaft 13 has an annular groove 19, and the groove 19 is located between the groove 18 and the bearing. A sealing cover 24 is provided on the outer wall of the housing 1 away from the partition 2. The sealing cover 24 is a square box with one end open. The sealing cover 24 is fixed to the housing 1 by bolts. A clearance groove is opened on the top of the sealing cover 24. A feed pipe 9 is welded in the clearance groove. The feed pipe 9 is a bent pipe. The bottom of the feed pipe 9 passes through the driven unit 6 and extends into the filter cylinder 7. The end of the feed pipe 9 in the filter screen is the lowest point on the feed pipe 9. A discharge port 10 is provided on the side wall of the filter chamber 3. The bottom of the discharge port 10 is higher than the lowest point of the inner wall of the filter cylinder 7. A drain port 25 is provided on the side wall of the filter chamber 3 below the discharge port 10. The bottom of the drain port 25 is flush with the bottom surface of the filter chamber 3. A sealing plug is provided inside the drain port 25. A slag discharge port 12 is provided at the bottom of the slag discharge chamber 4. A baffle 29 is provided on the outside of the slag discharge port 12 by bolts. The upper end of the shell 1 is open, and the top of the shell 1 is provided with a cover plate 26. An air inlet pipe 27 is welded on the cover plate 26 and passes through both sides of the cover plate 26. Multiple nozzles 28 are connected to the air inlet pipe 27 on the inner side of the shell 1. The air outlet of the nozzle 28 is directly facing the filter cartridge 7. The inner wall of the shell 1 is provided with a rock wool insulation layer. Refractory bricks are provided inside the rock wool insulation layer. Nickel-chromium electric heating wires are provided between the rock wool insulation layer and the refractory bricks.

[0020] Usage process: Before using this invention, the filter cartridge 7 is first installed or replaced. The installation method is as follows: open the cover plate 26, loosen the bolts on the bearing bush 15, and remove one bearing bush 15 from each of the two discs 14. Since the distance between the two hollow shafts 13 is greater than the length of the filter cartridge 7, and the width of the bearing bush 15 is greater than the length of the hollow shaft 13 extending into the filter cartridge 7, the filter cartridge 7 can be smoothly placed on the bearing bush 15 welded to the disc 14. Then, the removed bearing bush 15 is re-fixed on the disc 14. At this time, the filter cartridge 7 is fixed. Then, the pulley 11 is connected to the external power source through the belt. When in use, connect the aluminum liquid discharge pipe from the previous process to the feed pipe 9, connect the heating wire circuit, and before starting to inject aluminum liquid into the housing 1, first seal the drain port 25 with the sealing plug, then connect the nitrogen source outlet pipe to the inlet pipe 27 on the cover plate 26, fill the housing 1 with nitrogen, and after the housing 1 is filled with nitrogen, start the external power, the pulley 11 drives the filter cartridge 7 to rotate through the active unit 5, and pour the aluminum liquid into the housing 1 through the previous process; The molten aluminum enters the inner cavity of the filter cylinder 7 through the feed pipe 9. Impurities in the molten aluminum are trapped on the inner wall of the filter cylinder 7. Since the drain port 25 is blocked at this time and the bottom of the discharge port 10 is higher than the lowest point of the inner wall of the filter cylinder 7, the molten aluminum level in the housing 1 continues to rise until the molten aluminum can be discharged from the discharge port 10 to the next process. When the aluminum liquid is filtered in the filter cylinder 7, the filter cylinder 7 rotates continuously. Therefore, even if the impurities in the aluminum liquid are blocked in the filter holes, they will be backflowed back into the filter cylinder 7 by the nitrogen gas sprayed from the nozzle 28 when the filter cylinder 7 rotates to the top. Since the liquid level in the filter cylinder 7 is higher than the lowest point of the inner wall of the filter cylinder 7, and the inner wall of the filter cylinder 7 is welded with an auger 8, the impurities will move towards the slag discharge chamber 4 with the aluminum liquid when they fall back into the aluminum liquid and have not blocked the filter holes again. This continues until the impurities move to the active unit 5. Because the inner disc 14 of the active unit 5 has an arc plate 20 facing the filter cylinder 7, and the projection area of ​​the arc plate 20 on the outer wall of the hollow shaft 13 is a through groove 21, and the housing 1 is equipped with an electric heating wire, the impurities will not solidify and will always flow in the aluminum liquid. Therefore, the impurities and some aluminum liquid will be lifted by the arc plate 20. When the arc plate 20 rotates to the top of the hollow shaft 13, the impurities will flow with the aluminum liquid from the through groove 21 to the inner cavity of the hollow shaft 13, and under the push of the spiral plate 23 in the hollow shaft 13, they will flow to the square groove 22 and finally fall into the slag discharge chamber 4. When in use, it is only necessary to open the baffle 29 at the slag discharge port 12 periodically to achieve continuous filtration without the filter plate being worn or leaking. After use, pull the sealing plug out of the drain port 25 to let the residual aluminum liquid in the housing 1 flow out. After the aluminum liquid is completely drained, disconnect the heating wire circuit. After the housing 1 has completely cooled down, open the cover plate 26 to clean the inner wall.

[0021] During use, although the molten aluminum is carried by the disc 14 to the top of the hollow shaft 13, the outer wall of the hollow shaft 13 is provided with a sink 19 and the conical surface 17 is provided with a groove 18. Therefore, when the molten aluminum slides down the inner wall of the filter chamber 3, it will drip down from the groove 18 into the lower groove 18 or onto the hollow shaft 13. Since the sink 19 is located between the groove 18 and the bearing, the molten aluminum on the hollow shaft 13 will only drip down from the sink 19 onto the conical surface 17 and eventually flow back to the lower part of the housing 1. This prevents the molten aluminum from entering the bearing and causing the bearing to be unable to rotate after the molten aluminum cools down.

[0022] It is worth noting that the sealing plug at the drain port 25 only needs to ensure that the leakage rate is less than the inlet rate at the feed pipe 9. The purpose is to make the aluminum liquid level in the shell 1 rise to the outlet 10.

[0023] The hollow shaft 13 inside the active unit 5 can be made by welding two symmetrical semi-cylinders. Each semi-cylinder has multiple square grooves 22 in the middle. One of the semi-cylinders has a spiral plate 23 welded to its inner wall and two end blocks welded to its ends. Finally, the two semi-cylinders are welded together to form a cylinder with both ends sealed.

Claims

1. A continuous casting and rolling equipment for aluminum plate production, characterized in that, Includes a shell (1), inside which is a partition (2), which divides the inner cavity of the shell (1) into a filter chamber (3) and a slag discharge chamber (4). An active unit (5) is provided on the partition (2), and a driven unit (6) is provided on the side of the filter chamber (3) away from the partition (2). A filter cylinder (7) is provided between the active unit (5) and the driven unit (6). The active unit (5) and the driven unit (6) can drive the filter cylinder (7) to rotate around its own axis. An auger (8) is provided on the inner wall of the filter cylinder (7); the outer side of the driven unit (6) A feed pipe (9) is fixed on the housing (1). The bottom of the feed pipe (9) passes through the driven unit (6) and extends into the filter cylinder (7). A discharge port (10) is opened on the side wall of the filter chamber (3). The bottom of the discharge port (10) is higher than the lowest point of the inner wall of the filter cylinder (7). The other side of the active unit (5) passes through the slag discharge chamber (4) and extends to the other side of the housing (1) and is equipped with a pulley (11). When the active unit (5) rotates, it can transport the solid in the filter cylinder (7) to the slag discharge chamber (4). A slag discharge port (12) is provided at the bottom of the slag discharge chamber (4).

2. The device according to claim 1, characterized in that, Both the active unit (5) and the driven unit (6) include a hollow shaft (13). One end of the hollow shaft (13) is located outside the housing (1), and the other end extends into the filter chamber (3) and is welded with a disc (14). The inner cavity of the hollow shaft (13) extends through the disc (14) and into the filter cylinder (7). The distance between the two hollow shafts (13) is greater than the length of the filter cylinder (7). The disc (14) is provided with two bearings (15) on the side facing the filter cylinder (7). The inner wall of the bearing (15) is in contact with the outer wall of the filter cylinder (7), and the central angle corresponding to the bearing (15) is a flat angle. One bearing (15) is welded to the disc (14), and the other bearing (15) is connected to the disc (14) by bolts. The width of the bearing (15) is greater than the length of the hollow shaft (13) extending into the filter cylinder (7).

3. The device according to claim 2, characterized in that, Both the housing (1) and the partition (2) have through holes (16). The side of the through hole (16) facing the filter chamber (3) is set as a conical surface (17), and the large diameter end of the conical surface (17) faces the filter cylinder (7). The hollow shaft (13) is connected to the end of the through hole (16) away from the conical surface (17) through a bearing. The conical surface (17) has an annular groove (18), and the outer wall of the hollow shaft (13) has an annular groove (19), and the groove (19) is located between the groove (18) and the bearing.

4. The device according to claim 2, characterized in that, The hollow shaft (13) in the active unit (5) is sealed at both ends. One end of the hollow shaft (13) extends through the slag discharge chamber (4) to the outside of the shell (1) and is connected to the pulley (11). An arc plate (20) is welded to the side of the disc (14) facing the filter cylinder (7). The generatrix of the arc plate (20) is parallel to the axis of the filter cylinder (7). The width of the arc plate (20) is less than the length of the hollow shaft (13) extending into the filter cylinder (7). The projection area of ​​the arc plate (20) on the outer wall of the hollow shaft (13) is set as a through groove (21). Multiple square grooves (22) that penetrate the inner wall are evenly distributed on the side wall of the hollow shaft (13) in the slag discharge chamber (4). A spiral plate (23) is welded to the inner wall of the hollow shaft (13). The spiral direction of the spiral plate (23) is the same as that of the auger (8).

5. The device according to claim 1, characterized in that, The outer wall of the housing (1) away from the partition (2) is provided with a sealing cover (24). The sealing cover (24) is a square box with one end open. The sealing cover (24) is fixed to the housing (1) by bolts. The top of the sealing cover (24) has a relief groove. The feed pipe (9) is a bent pipe. The outer wall of the feed pipe (9) outside the housing (1) is welded to the relief groove. The end of the feed pipe (9) inside the filter screen is the lowest point on the feed pipe (9).

6. The device according to claim 1, characterized in that, The filter chamber (3) is provided with a drain port (25) on its side wall. The bottom of the drain port (25) is flush with the bottom surface of the filter chamber (3). A sealing plug is provided inside the drain port (25).

7. The device according to claim 1, characterized in that, The upper end of the housing (1) is open, and a cover plate (26) is provided on the top of the housing (1). An air inlet pipe (27) is welded on the cover plate (26) and passes through both sides of the cover plate (26). Multiple nozzles (28) are connected to the air inlet pipe (27) on the inner side of the housing (1). The air outlet of the nozzle (28) is directly facing the filter cartridge (7).

8. The device according to claim 1, characterized in that, The inner wall of the shell (1) is provided with a rock wool insulation layer, and refractory bricks are provided on the inner side of the rock wool insulation layer. Nickel-chromium heating wires are provided between the rock wool insulation layer and the refractory bricks.

9. The device according to claim 1, characterized in that, A baffle (29) is provided on the outside of the slag discharge port (12) by bolts.

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