A device for removing slag from a continuously cast billet

Abstract

This patent discloses a slag removal device for continuous casting billets, including a slag removal base. Support frames a and b are mounted on both the left and right ends of the slag removal base. A slag removal machine is mounted on the upper end of the slag removal base. A continuous casting billet winding roller is mounted on the upper end of support frame a, and a continuous casting billet conveying roller is mounted on the upper end of support frame b. A slag removal port is opened at the bottom end of the slag removal machine. A slag removal plate is installed inside the slag removal port. Cleaning knife holders are evenly and equidistantly installed at the bottom end of the slag removal plate, and cleaning scrapers are mounted on the cleaning knife holders. This device, through the slag removal plate inside the slag removal port at the bottom end of the slag removal machine, in conjunction with the evenly and equidistantly installed cleaning knife holders and cleaning scrapers at its bottom, forms a multi-set collaborative slag removal structure. Compared with the traditional single scraper, it can more comprehensively adhere to the surface of the continuous casting billet, effectively removing residual slag and iron oxide scale from different areas, and avoiding slag removal dead zones caused by uneven adhesion.

Description

Technical Field

[0001] This patent relates to the field of slag removal devices, specifically a slag removal device for continuous casting billets. Background Technology

[0002] In the continuous casting production process of the iron and steel metallurgical industry, the continuously cast billet, as a key intermediate product before steel rolling, has impurities such as slag and iron oxide scale remaining on its surface and edges. These impurities directly affect the product quality of subsequent rolling processes. Minor issues may include scratches and cracks on the steel surface, while major issues can lead to strip breakage and equipment damage during rolling. Therefore, slag removal from the continuously cast billet is a crucial step in ensuring the quality of steel products. Currently, most slag removal devices used in the industry suffer from limited functionality and difficulty in achieving both high cleaning efficiency and cleanliness. Traditional slag removal equipment typically relies on a single scraper structure for one-time cleaning of the billet surface. However, due to the potential for positional shifts in the billet during transport caused by roller conveyor deviations, the scraper does not adhere evenly to the billet surface, making it difficult to effectively remove residual slag in some areas. This necessitates manual re-cleaning, increasing labor costs and extending the production cycle. Therefore, we propose a slag removal device for continuously cast billets. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this patent is to provide a slag removal device for continuous casting billets.

[0004] The technical solution adopted by this patent to solve its technical problem is: a continuous casting billet slag removal device, including a slag removal base, with support frames a and b installed at both ends of the slag removal base, a slag removal machine installed at the upper end of the slag removal base, a continuous casting billet winding roller installed at the upper end of support frame a, and a continuous casting billet conveying roller installed at the upper end of support frame b; a slag removal port is opened at the bottom end of the slag removal machine, a slag removal plate is installed inside the slag removal port, cleaning knife holders are evenly and equidistantly installed at the bottom end of the slag removal plate, cleaning scrapers are installed on the cleaning knife holders, and a continuous casting billet sorting component is installed at the upper end of the slag removal base located below the slag removal port.

[0005] Furthermore, the continuous casting billet sorting assembly includes a sorting frame, on which a conveyor belt is mounted, and on which cleaning rollers are mounted.

[0006] Furthermore, a cleaning brush is fitted to the upper end of the cleaning roller.

[0007] Furthermore, a slag discharge hole is provided between two adjacent cleaning rollers.

[0008] Furthermore, a drive frame a is installed at the upper end of the support frame a, the continuous casting billet winding roller is installed inside the drive frame a, and a drive frame b is installed at the upper end of the support frame b, the continuous casting billet conveying roller is installed inside the drive frame b.

[0009] Furthermore, a balance roller a is installed at the front end of the drive frame a, and a balance roller b is installed at the front end of the drive frame b.

[0010] The beneficial effects of this patent are: This device utilizes a slag-cleaning plate inside the slag-cleaning port at the bottom of the slag cleaner, along with cleaning blade holders and scrapers evenly spaced at the bottom, forming a multi-unit collaborative slag-cleaning structure. Compared to a traditional single scraper, this structure can more comprehensively adhere to the surface of the continuously cast billet, effectively removing residual slag and iron oxide scale from different areas and avoiding dead zones caused by uneven adhesion. Simultaneously, the cleaning rollers and cleaning brushes above the conveyor belt in the continuously cast billet finishing assembly provide secondary auxiliary cleaning of the surface of the billet after slag removal, further removing fine debris. This significantly reduces the need for subsequent manual cleaning, lowers labor costs, shortens the production cycle, and ensures the surface cleanliness of the continuously cast billet meets the requirements of subsequent rolling processes. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this patent.

[0012] Figure 2 This is a schematic diagram of the slag removal machine of this patent.

[0013] Figure 3 This is a front view of the slag removal machine of this patent.

[0014] Figure 4 This is a schematic diagram of part A of this patent.

[0015] Explanation of reference numerals in the attached drawings: 1. Slag cleaning base; 2. Support frame a; 3. Support frame b; 4. Slag cleaning machine; 5. Drive frame a; 6. Continuous casting billet winding roller; 7. Balance roller a; 8. Drive frame b; 9. Continuous casting billet conveying roller; 10. Balance roller b; 11. Slag cleaning port; 12. Sorting frame; 13. Conveyor belt; 14. Cleaning roller; 15. Slag cleaning plate; 16. Cleaning knife holder; 17. Slag discharge hole; 18. Cleaning brush. Detailed Implementation

[0016] The present patent is further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the patent. Furthermore, it should be understood that after reading the teachings of this patent, those skilled in the art can make various alterations or modifications to this patent, and these equivalent forms also fall within the scope defined by the appended claims.

[0017] See Figure 1 , Figure 2 , Figure 3 and Figure 4This is a schematic diagram of the structure of this patent, a slag removal device for continuous casting billets, including a slag removal base 1. Support frames a2 and b3 are installed at both ends of the slag removal base 1. A slag removal machine 4 is installed at the upper end of the slag removal base 1. A continuous casting billet winding roller 6 is installed at the upper end of the support frame a2. A continuous casting billet conveying roller 9 is installed at the upper end of the support frame b3. A slag removal port 11 is opened at the bottom end of the slag removal machine 4. A slag removal plate 15 is installed inside the slag removal port 11. Cleaning knife holders 16 are evenly and equidistantly installed at the bottom end of the slag removal plate 15. Cleaning scrapers 19 are installed on the cleaning knife holders 16. A continuous casting billet sorting component is installed at the upper end of the slag removal base 1, which is located below the slag removal port 11.

[0018] In this technical solution, the slag cleaning base 1 is welded from Q235 low-carbon steel plate, forming a rectangular frame structure. Anti-slip feet are welded to the bottom, and wear-resistant rubber pads are attached to the bottom of the feet to enhance the stability of the device on the ground and prevent displacement due to vibration during operation. Support frames a2 and b3 are both rectangular steel structures welded from seamless steel pipes. Their height is designed according to the installation height of the continuous casting billet winding roller 6 and the continuous casting billet conveying roller 9. Both support frames a2 and b3 have several reinforcing rib holes on their side walls to improve structural load-bearing strength. The slag cleaning machine 4 is a box-type structure with a high-temperature resistant stainless steel outer shell. Internally, it has a pre-reserved motor mounting cavity and transmission component mounting slot to accommodate drive motors of different power. The left and right ends of the base 1 are fixedly connected to the bottom ends of the support frame a2 and support frame b3 respectively by bolts. The bolts are high-strength galvanized bolts to prevent rust and loosening after long-term use. The slag cleaning machine 4 is aligned with the pre-set mounting holes on the upper end of the slag cleaning base 1 through the flange at the bottom, and then detachably connected by fastening bolts, which facilitates the subsequent maintenance and replacement of the slag cleaning machine 4. The two ends of the continuous casting billet winding roller 6 are rotatably connected to the bearing seats on the upper end of the support frame a2 through bearings. The two ends of the continuous casting billet conveying roller 9 are also rotatably connected to the bearing seats on the upper end of the support frame b3 through bearings. The bearings are high-temperature resistant deep groove ball bearings to reduce the frictional resistance when the roller rotates. The slag cleaning port 11 is a rectangular opening, which is opened at the center of the bottom end of the slag cleaning machine 4. The width is slightly larger than the maximum width of the continuously cast billet, and the opening height is designed according to the thickness of the continuously cast billet to ensure that the billet can pass through smoothly. The slag removal plate 15 is a rectangular metal plate made of high-hardness alloy steel plate. Its length is the same as the length of the slag removal opening 11, and its thickness is 10-15mm. The surface is hardened to improve wear resistance. The cleaning cutter holder 16 is a block structure made of stainless steel and is fixed to the bottom of the slag removal plate 15 by welding. The distance between two adjacent cleaning cutter holders 16 is 50-80mm, and each cleaning cutter holder 16 has a cutter groove at the bottom. The cleaning scraper 19 is a sheet structure made of tungsten steel. The blade is polished, and the top is detachably connected to the cutter groove of the cleaning cutter holder 16 by bolts for easy scraping. Replacement of worn blades; The slag cleaning plate 15 is slidably connected to the inner wall of the slag cleaning port 11 via sliders on both sides. High-temperature resistant grease is applied between the sliders and the grooves, allowing the slag cleaning plate 15 to move up and down along the grooves to adapt to continuous casting billets of different thicknesses; The cleaning blade holder 16 is fixedly connected to the slag cleaning plate 15, while the cleaning scraper 19 is detachably connected to the cleaning blade holder 16. During installation, it must be ensured that the blade of the cleaning scraper 19 faces the direction of continuous casting billet transmission, and that the blades of all cleaning scrapers 19 are on the same horizontal plane to avoid uneven slag removal due to inconsistent blade heights; The slag cleaning port 11 corresponds vertically to the continuous casting billet sorting assembly. The continuous casting billet sorting assembly below the slag cleaning port 11 can support the continuous casting billet, ensuring that the surface of the continuous casting billet is in close contact with the cleaning scraper 19.

[0019] In some technical solutions, the continuous casting billet sorting assembly includes a sorting frame 12, a conveyor belt 13 is mounted on the sorting frame 12, and a cleaning roller 14 is mounted on the conveyor belt 13.

[0020] In this technical solution, the sorting frame 12 is a frame structure, welded from angle steel. Its length is the same as the length of the slag cleaner 4, and its width is slightly larger than the width of the continuous casting billet. Roller mounting holes are provided on the vertical bars on both sides. The conveyor belt 13 is a ring-shaped rubber belt with anti-slip texture on the surface. It is made of high-temperature resistant rubber and can withstand the high-temperature environment during the slag cleaning process. The width of the conveyor belt 13 is adapted to the width of the sorting frame 12. The cleaning roller 14 is a cylindrical structure. The roller body is made of seamless steel pipe, and brush mounting holes are evenly provided on the surface. Shaft heads are provided at both ends of the roller body, and the diameter of the shaft heads is the same as the diameter of the roller mounting holes of the sorting frame 12. The sorting frame 12 is connected to the slag cleaner by the support legs at the bottom. The base 1 is bolted to a pre-set mounting position on the upper end, and the support leg height is adjustable to ensure that the transmission surface of the conveyor belt 13 is matched with the height of the slag cleaning port 11. The conveyor belt 13 is fitted onto the drive rollers at both ends of the sorting frame 12. The drive rollers are connected to the drive motor mounted on the side of the sorting frame 12 via a coupling. When the motor is started, it can drive the conveyor belt 13 to rotate cyclically. The shaft head of the cleaning roller 14 is rotatably connected to the roller shaft mounting hole of the sorting frame 12 via a bearing. The cleaning rollers 14 are evenly distributed above the transmission surface of the conveyor belt 13, and the distance between two adjacent cleaning rollers 14 is 100-150mm. The distance between the roller surface of the cleaning roller 14 and the transmission surface of the conveyor belt 13 is slightly less than the thickness of the continuous casting billet. In some technical solutions, a cleaning brush 18 is fitted to the upper end of the cleaning roller 14.

[0021] In this technical solution, the cleaning brush 18 is made of nylon, with bristle length of 20-30mm and bristle diameter of 0.5-0.8mm. It possesses high elasticity and wear resistance, and good high-temperature resistance. The cleaning brush 18 is fixed in the mounting holes on the surface of the cleaning roller 14 using a bristle implantation process. The bristles are distributed in a spiral pattern, with a spacing of 10-15mm between adjacent rows, ensuring that the bristles fully cover the surface of the continuously cast billet when the cleaning roller 14 rotates. The cleaning brush 18 is fixedly connected to the cleaning roller 14. When the cleaning roller 14 rotates, it can drive the cleaning brush 18 to rotate synchronously. When the continuous casting billet passes under the cleaning roller 14, the bristles of the cleaning brush 18 will make close contact with the surface of the continuous casting billet, and the elasticity of the bristles can adapt to the slight undulations on the surface of the continuous casting billet, avoiding scratching the surface of the continuous casting billet. The cleaning brush 18 and the cleaning scraper 19 cooperate with each other. The cleaning scraper 19 first scrapes off the large pieces of slag, and the cleaning brush 18 then removes the fine fragments, realizing secondary slag cleaning.

[0022] In some technical solutions, a slag discharge hole 17 is provided between two adjacent cleaning rollers 14.

[0023] In this technical solution, the slag discharge holes 17 are circular holes, opened on the conveyor belt 13. Two to three slag discharge holes 17 are opened between two adjacent cleaning rollers 14. The diameter of the slag discharge holes 17 is 15-20mm, and the edges of the holes are ground to avoid scratching the bottom surface of the continuous casting billet. A slag receiving hopper is installed on the sorting frame 12 below the conveyor belt 13. The slag receiving hopper is a funnel-shaped structure made of sheet metal. Its opening area is larger than the total area of ​​the slag discharge holes 17 on the conveyor belt 13, and a slag discharge pipe is connected to the bottom end. The slag discharge holes 17 are evenly distributed in the area between two adjacent cleaning rollers 14 on the conveyor belt 13, corresponding one-to-one with the position of the cleaning rollers 14, ensuring that the slag removed by the cleaning rollers 14 can fall through the slag discharge holes 17. The slag receiving hopper is installed below the conveyor belt 13, and its position is vertically aligned with the position of the slag discharge holes 17. It can catch the slag falling from the slag discharge holes 17. The slag discharge pipe at the bottom of the slag receiving hopper can guide the slag to the slag collection box outside the device.

[0024] In some technical solutions, a drive frame a5 is installed at the upper end of the support frame a2, the continuous casting billet winding roller 6 is installed inside the drive frame a5, and a drive frame b8 is installed at the upper end of the support frame b3, the continuous casting billet conveying roller 9 is installed inside the drive frame b8.

[0025] In this technical solution, both drive frame a5 and drive frame b8 are frame structures welded from channel steel. The height of drive frame a5 is adapted to the height of support frame a2, and the height of drive frame b8 is adapted to the height of support frame b3. Both drive frames a5 and b8 internally house drive motors and gearboxes. The drive motors are variable frequency motors with adjustable speeds. The gearboxes are connected to the drive motors via couplings, and the output shafts are connected to the shaft ends of the continuous casting billet take-up roller 6 and the continuous casting billet conveying roller 9. Drive frame a5 is connected via a bottom... The flange is bolted to the upper end of the support frame a2. The output shaft of the gearbox inside the drive frame a5 is connected to one end of the continuous casting billet take-up roller 6 via a coupling to achieve power transmission. The drive frame b8 is bolted to the upper end of the support frame b3 via the bottom flange. The output shaft of the gearbox inside the drive frame b8 is connected to one end of the continuous casting billet conveying roller 9 via a coupling. Both drive frames a5 and b8 are equipped with motor control buttons on their sides, which can control the start, stop and speed of the continuous casting billet take-up roller 6 and the continuous casting billet conveying roller 9 respectively.

[0026] In some technical solutions, a balance roller a7 is installed at the front end of the drive frame a6, and a balance roller b10 is installed at the front end of the drive frame b8.

[0027] In this technical solution, both the balance roller a7 and the balance roller b10 are cylindrical rollers made of seamless steel pipes with chrome plating to improve smoothness and wear resistance. The length of the balance roller a7 is the same as the length of the continuous casting billet take-up roller 6, and the length of the balance roller b10 is the same as the length of the continuous casting billet conveying roller 9. Shaft ends are provided at both ends of the rollers, and these shaft ends are rotatably connected to the bearing seats at the front end of the drive frame a5 and drive frame b8 via bearings. The balance roller a7 is installed at the front end of the drive frame a5, and its axis is aligned with the axis of the continuous casting billet take-up roller 6. The balance roller a7 and the roller surface of the continuous casting billet take-up roller 6 are parallel and on the same horizontal plane. The balance roller b10 is installed at the front end of the drive frame b8, and its axis is parallel to the axis of the continuous casting billet conveying roller 9. The roller surface of the balance roller b10 and the roller surface of the continuous casting billet conveying roller 9 are on the same horizontal plane. After the continuous casting billet is drawn out from the continuous casting billet take-up roller 6, it is first guided by the balance roller a7 and then transferred to the slag cleaner 4. After the slag is cleaned, the continuous casting billet is guided by the balance roller b10 and then conveyed to the next process by the continuous casting billet conveying roller 9.

[0028] Working principle: Billet transfer start-up: After the device is started, the variable frequency motor in the drive frame a5 drives the continuous casting billet take-up roller 6 to rotate through the reduction gearbox, releasing the continuous casting billet to be cleaned; the continuous casting billet is first guided and corrected by the balance roller a7 to ensure accurate transmission direction, and then enters the working area at the upper end of the slag cleaning base 1. At the same time, the motor in the drive frame b8 drives the continuous casting billet conveying roller 9 to rotate, providing power for the subsequent output of the billet. Slag removal operation: When the continuous casting billet enters below the slag removal machine 4, the slag removal plate 15 in the slag removal port 11 at the bottom of the slag removal machine 4 is adjusted along the slide to a height that matches the thickness of the billet, so that the tungsten steel cleaning scraper 19 on the cleaning cutter holder 16 is in close contact with the surface of the billet; as the billet is conveyed at a uniform speed with the conveyor belt 13, the cleaning scraper 19 simultaneously scrapes off large pieces of residual slag and iron oxide scale from the surface of the billet, completing the initial slag removal.

[0029] Secondary cleaning and billet finishing: The billet after the initial slag removal continues to move with the conveyor belt 13 and enters the continuous casting billet finishing component area; the cleaning roller 14 above the conveyor belt 13 rotates passively with the billet transmission, and the spirally distributed nylon cleaning brushes 18 on its surface contact the billet surface to brush away the fine debris and dust that the scraper did not clean, thus achieving secondary slag removal; at the same time, the cleaning roller 14 rolls and finishes the billet to ensure that the billet is flat. Slag collection and discharge: The slag generated during secondary cleaning falls onto the surface of the conveyor belt 13 and moves with the conveyor belt 13 to the slag discharge hole 17 between the adjacent cleaning rollers 14. The slag falls into the slag receiving hopper on the sorting frame 12 below through the slag discharge hole 17, and is then guided to the slag collection box outside the device through the slag discharge pipe at the bottom of the slag receiving hopper, thus completing the centralized collection of slag and avoiding secondary pollution. Slag removal after billet output: After completing two slag removal and sorting processes, the continuously cast billet is guided and corrected again by the balance roller b10, and then conveyed to the next production process by the continuously cast billet conveying roller 9. The entire slag removal process is completed continuously, realizing automated and efficient slag removal of the continuously cast billet.

[0030] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this patent is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this patent. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A slag removal device for continuous casting billets, comprising a slag removal base (1), characterized in that, The left and right ends of the slag cleaning base (1) are equipped with support frame a (2) and support frame b (3). The upper end of the slag cleaning base (1) is equipped with a slag cleaning machine (4). The upper end of the support frame a (2) is equipped with a continuous casting billet winding roller (6). The upper end of the support frame b (3) is equipped with a continuous casting billet conveying roller (9). The bottom end of the slag cleaning machine (4) is provided with a slag cleaning port (11). The slag cleaning port (11) is equipped with a slag cleaning plate (15). The bottom end of the slag cleaning plate (15) is evenly and equidistantly equipped with cleaning knife holders (16). The cleaning knife holders (16) are equipped with cleaning scrapers (19). The upper end of the slag cleaning base (1) is located at the lower end of the slag cleaning port (11) and is equipped with a continuous casting billet sorting component.

2. The slag removal device for continuous casting billets according to claim 1, characterized in that: The continuous casting billet sorting assembly includes a sorting frame (12), on which a conveyor belt (13) is mounted, and on which a cleaning roller (14) is mounted.

3. The slag removal device for continuous casting billets according to claim 2, characterized in that: The upper end of the cleaning roller (14) is equipped with a cleaning brush (18).

4. The slag removal device for continuous casting billets according to claim 3, characterized in that: A slag discharge hole (17) is provided between two adjacent cleaning rollers (14).

5. The slag removal device for continuous casting billets according to claim 1, characterized in that: The upper end of the support frame a (2) is equipped with a drive frame a (5), the continuous casting billet winding roller (6) is installed inside the drive frame a (5), the upper end of the support frame b (3) is equipped with a drive frame b (8), and the continuous casting billet conveying roller (9) is installed inside the drive frame b (8).

6. The slag removal device for continuously cast billets according to claim 5, characterized in that: The front end of the drive frame a (6) is equipped with a balance roller a (7), and the front end of the drive frame b (8) is equipped with a balance roller b (10).

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