Continuous casting tundish slag blocking wall

Abstract

The utility model relates to a continuous casting tundish slag stopping wall which effectively solves the problems that an existing slag stopping wall is fixed in structure, low in slag particle separation efficiency, poor in filtering effect and capable of affecting the molten steel treatment effect. According to the continuous casting tundish slag blocking wall, the corresponding structure can be replaced according to the scouring erosion condition, material waste is reduced, and the impact erosion resisting effect of the first wall body can be enhanced through the reinforcing plate; the inclined overflow port can block scum on the surface of molten steel, the rotational flow pipe fitting can correspond to the flow direction of the molten steel through the adjusting mechanism, so that the molten steel forms rotational flow, slag inclusion in the molten steel is conveniently combined and floats upwards to the surface of the molten steel to form a scum layer, and the conical guide plate can prevent the molten steel from directly flowing out of the discharge port. The molten steel can stay in the tundish for a longer time, slag inclusion in the molten steel has sufficient time to float upwards, the separation effect of slag in the molten steel is improved, and the purity of the molten steel and the treatment efficiency of the molten steel are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of slag retaining walls, specifically relating to a slag retaining wall for a continuous casting tundish. Background Technology

[0002] A slag retaining wall, also known as a weir, is a precast component made of refractory castable. It spans the entire width of the tundish, extending from the top of the tundish to a certain distance from the bottom. Molten steel can flow under it. The slag retaining wall is an important component of the continuous casting tundish. It can change the flow state of the molten steel in the tundish, prolong the residence time of the molten steel in the tundish, and promote the floating and discharge of slag inclusions in the molten steel. In use, molten steel flows from the ladle into the tundish, flows through the flow stabilizer to both ends of the tundish, and is blocked by the slag retaining wall. The slag retaining wall plays a very important role in molten steel treatment.

[0003] The existing slag retaining wall structure is fixed, resulting in low efficiency in separating slag particles, especially tiny slag particles, which are difficult to remove and affect the purity of molten steel. At the same time, the overall structure is not easy to adjust according to the impact direction of molten steel, and the filtration effect on slag inclusions is poor, which affects the steel treatment effect. Utility Model Content

[0004] To address the above issues and overcome the shortcomings of existing technologies, this utility model provides a slag-blocking wall for continuous casting tundishes. This slag-blocking wall enhances the impact and erosion resistance of the first wall. The swirl tubes facilitate the combination of inclusions in the molten steel and allow them to float to the surface to form a slag layer. The conical guide plate prevents the molten steel from flowing directly out of the discharge port, allowing it to remain in the tundish for a longer time. This provides sufficient time for inclusions in the molten steel to float, improving the separation effect of slag in the molten steel and significantly increasing the purity and processing efficiency of the molten steel.

[0005] A slag-blocking wall for continuous casting tundish includes a first wall and a second wall. The first wall and the second wall are vertically aligned and connected by a snap-fit ​​mechanism. A reinforcing plate is fixedly connected to the front of the first wall, and an overflow port in an inclined state is opened at the top of the front of the first wall. An adjustment mechanism is provided at the top of the first wall, and a swirl tube for guiding the flow of molten iron is provided at the movable end of the adjustment mechanism. A discharge port for discharging molten iron is opened at the bottom of the side of the second wall, and a conical guide plate for guiding the flow of molten iron is fixedly connected to the front of the second wall near the discharge port.

[0006] Preferably, both sides of the first wall and the second wall are outward-expanding structures that enhance the impact resistance of the first wall and the second wall, and the highest part of the overflow port on the side closer to the front of the first wall is lower than the lowest part of the port on the side closer to the back of the first wall.

[0007] Preferably, a triangular support plate is fixedly connected to the back of the second wall, and the number of the support plates is four, with the four support plates being fixedly connected at equal intervals to the bottom of the back of the second wall.

[0008] Preferably, the locking mechanism includes a trapezoidal locking block, a trapezoidal locking groove, an end locking block, and an end locking groove. The trapezoidal locking block is fixedly connected to the bottom of the first wall, while the trapezoidal locking groove is opened at the top of the second wall corresponding to the trapezoidal locking block. The trapezoidal locking block is inserted into the trapezoidal locking groove, and the narrow parts of both the trapezoidal locking block and the trapezoidal locking groove are close to the back of the first wall and the second wall. There are two end locking blocks and two end locking grooves, and the two end locking blocks are fixedly connected to the two sides of the bottom of the first wall. The two end locking grooves are opened at the two sides of the top of the second wall and vertically correspond to the two end locking blocks. The end locking blocks are inserted into the corresponding end locking grooves.

[0009] Preferably, the adjustment mechanism includes a first fixed tube, a horizontal adjustment rod, a second fixed tube, a vertical adjustment rod, and a collar. The first fixed tube is fixedly connected to the top of the first wall, and the horizontal adjustment rod passes horizontally through the inside of the first fixed tube. The second fixed tube is fixedly connected to the end of the horizontal adjustment rod near the front of the first wall, and the vertical adjustment rod passes vertically through the inside of the second fixed tube. The collar is fixedly connected to the bottom end of the vertical adjustment rod. The sides of both the first and second fixed tubes are threaded with fixing knobs, and the two fixing knobs abut against the horizontal adjustment rod and the vertical adjustment rod, respectively.

[0010] Preferably, the swirl tube includes a guide tube and a swirl plate. The swirl plate is spiral-shaped and fixedly connected inside the guide tube. The guide tube is horizontally fixedly connected inside the collar and corresponds horizontally to the reinforcing plate.

[0011] Preferably, the number of discharge ports and conical guide plates is several, and the several conical guide plates correspond to several discharge ports respectively. The conical guide plates are horizontally corresponding to the discharge ports and are fixedly connected to the end of the discharge port near the front of the second wall.

[0012] The beneficial effects of the above technical solution are as follows:

[0013] The slag-blocking wall of the continuous casting tundish consists of a first wall, a second wall, reinforcing plates, an overflow port, cyclone pipe fittings, and conical guide plates. The first and second walls are designed separately, allowing for replacement of the structure according to erosion conditions, reducing material waste. Reinforcing plates are installed at the locations of the first wall and the cyclone pipe fittings to enhance the first wall's resistance to impact erosion. The inclined overflow port blocks slag on the surface of the molten steel, allowing the molten steel below the slag to flow out through the overflow port. The cyclone pipe fittings are controlled by a regulating mechanism. The structure corresponds to the flow direction of molten steel, allowing some molten steel to flow backward through the vortex tubes, thus forming a vortex. This facilitates the combination of inclusions in the molten steel and their rise to the surface to form a slag layer. The conical guide plate prevents the molten steel from flowing directly out of the discharge port, acting as a barrier and allowing the molten steel to remain in the tundish for a longer time. This gives the inclusions sufficient time to rise, improving the separation of slag from the molten steel and greatly enhancing the purity and processing efficiency of the molten steel. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram showing the disassembled state of the first and second walls of this utility model;

[0016] Figure 3 This is a schematic diagram of the adjusting mechanism and swirl tube of this utility model;

[0017] Figure 4 This utility model Figure 3 A diagram illustrating the split state;

[0018] Figure 5 This is a side sectional view of the first wall and the second wall of this utility model;

[0019] Figure 6 This is a schematic diagram of the back of the first and second walls of this utility model.

[0020] In the diagram: 1. First wall; 2. Second wall; 3. Reinforcing plate; 4. Overflow port; 5. Swirl pipe fitting; 6. Discharge port; 7. Conical guide plate; 8. Support plate; 9. Trapezoidal block; 10. Trapezoidal slot; 11. End block; 12. End slot; 13. First fixed pipe; 14. Horizontal adjusting rod; 15. Second fixed pipe; 16. Vertical adjusting rod; 17. Collar; 18. Fixing knob; 19. Guide pipe; 20. Swirl plate. Detailed Implementation

[0021] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 6 The embodiments are described in detail below.

[0022] This embodiment provides a slag-blocking wall for a continuous casting tundish, as shown in the attached figure. Figure 1-6 As shown, the structure includes a first wall 1 and a second wall 2. Both sides of the first wall 1 and the second wall 2 are outward-expanding structures that enhance their impact resistance. The horizontal cross-section is an isosceles trapezoidal structure. The first wall 1 and the second wall 2 are vertically fixedly installed inside the intermediate package. Four triangular support plates 8 are fixedly connected to the back of the second wall 2, and the four support plates 8 are equidistantly fixed to the bottom of the back of the second wall 2, providing auxiliary support for the second wall 2 and the first wall 1 as a whole. The function is to improve the impact resistance of the first wall 1 and the second wall 2; both sides of the top of the first wall 1 are fixedly connected with hooks for hoisting it, and the entire slag retaining wall can be hoisted by hooking it with an external hoisting device. The first wall 1 and the second wall 2 are vertically aligned and the connection part is provided with a snap-fit ​​mechanism. The snap-fit ​​mechanism includes a trapezoidal snap block 9, a trapezoidal snap groove 10, an end snap block 11, and an end snap groove 12. The trapezoidal snap block 9 is fixedly connected to the bottom of the first wall 1, and the trapezoidal snap groove 10 is opened at the top of the second wall 2 and connects with the trapezoidal snap groove 12. The trapezoidal locking block 9 is inserted into the trapezoidal locking slot 10, and the narrow parts of both the trapezoidal locking block 9 and the trapezoidal locking slot 10 are close to the back of the first wall 1 and the second wall 2. There are three trapezoidal locking blocks 9 and three trapezoidal locking slots 10, and the three trapezoidal locking blocks 9 are equidistantly fixed to the bottom of the first wall 1. The three trapezoidal locking slots 10 are equidistantly opened at the top of the second wall 2. There are two end locking blocks 11 and two end locking slots 12, and the two end locking blocks 11 are respectively fixed to the two sides of the bottom of the first wall 1. The end slots 12 are respectively opened on both sides of the top of the second wall 2 and vertically correspond to the two end blocks 11. The end blocks 11 are inserted into the corresponding end slots 12. The first wall 1 is connected to the second wall 2 through the trapezoidal block 9 and the end blocks 11. The trapezoidal block 9 is inserted into the trapezoidal slot 10, and the end blocks 11 are inserted into the end slots 12, which can play a good limiting role for the first wall 1. After the first wall 1 is impacted by molten steel, it will be more firmly connected to the second wall 2, which can ensure the firmness of the first wall 1.

[0023] A reinforcing plate 3 is fixedly connected to the front of the first wall 1, and an overflow port 4 with an inclined state is opened at the top of the front of the first wall 1. The reinforcing plate 3 can be made of zirconium oxide-based material ZrO2, which has excellent resistance to steel penetration and can effectively prevent steel from scouring and eroding the front of the first wall 1, thus extending the service life of the slag retaining wall. The highest part of the overflow port 4 on the side near the front of the first wall 1 is lower than the lowest part of the opening on the side near the back of the first wall 1. When the liquid level of the molten steel is set to be higher than the height of the overflow port 4 on the side near the back of the first wall 1, the slag inclusions in the molten steel will float on the surface of the molten steel and be higher than the opening of the overflow port 4 on the front of the first wall 1. The slag in the molten steel below the slag inclusions will all gather on the surface of the molten steel and will not be discharged backward due to the obstruction of the first wall 1. The molten steel below will be discharged backward through the overflow port 4, preventing the molten steel from overflowing in the tundish.

[0024] An adjustment mechanism is provided at the top of the first wall 1. The adjustment mechanism includes a first fixed tube 13, a horizontal adjustment rod 14, a second fixed tube 15, a vertical adjustment rod 16, and a collar 17. The first fixed tube 13 is fixedly connected to the top of the first wall 1, and the horizontal adjustment rod 14 passes horizontally through the inside of the first fixed tube 13. The second fixed tube 15 is fixedly connected to the end of the horizontal adjustment rod 14 near the front of the first wall 1, and the vertical adjustment rod 16 passes vertically through the inside of the second fixed tube 15. The collar 17 is fixedly connected to the end of the horizontal adjustment rod 14 near the front of the first wall 1. At the bottom end of the adjusting rod 16, the sides of the first fixing tube 13 and the second fixing tube 15 are threaded with fixing knobs 18. The two fixing knobs 18 abut against the horizontal adjusting rod 14 and the vertical adjusting rod 16 respectively, which can fix the position of the horizontal adjusting rod 14 and the vertical adjusting rod 16. The position of the vortex tube 5 can be easily adjusted by the horizontal adjusting rod 14 and the vertical adjusting rod 16, so that the vortex tube 5 can be adjusted to correspond with the molten steel outlet end according to the molten steel outlet part, and more molten steel can flow through the vortex tube 5.

[0025] The movable end of the regulating mechanism is equipped with a vortex tube 5 for guiding the flow of molten iron. The vortex tube 5 includes a guide tube 19 and a vortex plate 20. The vortex plate 20 is spiral-shaped and fixedly connected inside the guide tube 19. The guide tube 19 is horizontally fixedly connected inside the collar 17 and corresponds horizontally to the reinforcing plate 3. After the molten steel enters the guide tube 19, it can generate a vortex under the guidance of the vortex plate 20, so that the inclusions and small particles of slag in the molten steel can be better combined and float to the surface of the molten steel after flowing out of the guide tube 19. After the inclusions gather together, they form a slag layer on the surface of the molten steel and are blocked by the first wall 1. The slag layer can be cleaned off by an external cleaning device. The vortex tube 5 can promote the combination of inclusions in the molten steel and promote the slag to float.

[0026] The bottom of the side of the second wall 2 is provided with a discharge port 6 for discharging molten iron, and a conical guide plate 7 for guiding the molten iron is fixedly connected to the front of the second wall 2 near the discharge port 6. There are several discharge ports 6 and several conical guide plates 7, and several conical guide plates 7 correspond to several discharge ports 6 respectively. Molten steel can be discharged from the discharge port 6. The conical guide plates 7 are horizontally corresponding to the discharge ports 6 and fixedly connected to the end of the discharge port 6 near the front of the second wall 2. The conical guide plates 7 can block the molten steel. The conical guide plate 7, with its herringbone shape and horizontal tip facing the direction of steel flow, diverts the molten steel. As the molten steel flows along both sides of the conical guide plate 7, it generates vortices, which promotes the binding and floating of inclusions between the molten steel. It also prevents the molten steel from being discharged directly from the discharge port 6, thus extending the residence time of the molten steel in the tundish and allowing the slag inside to float and precipitate better, thereby improving the purity of the molten steel.

[0027] In summary, the steps for using this slag-retaining wall in the continuous casting tundish are as follows:

[0028] 1. The first wall 1 and the second wall 2 are connected and fixed to each other by trapezoidal clips 9 and end clips 11, and the first wall 1 and the second wall 2 are vertically fixed in the corresponding positions inside the intermediate pot by high temperature resistant bolts;

[0029] 2. Adjust the position of the swirl tube 5 by adjusting the horizontal adjusting rod 14 and the vertical adjusting rod 16 so that it corresponds to the outlet of the molten steel. After the molten steel enters the guide pipe 19, it can generate a swirling flow under the guidance of the swirl plate 20, so that the inclusions and small particles of slag in the molten steel can be better combined and float to the surface of the molten steel after flowing out of the guide pipe 19. After the inclusions gather together, they form a slag layer on the surface of the molten steel and are blocked by the first wall 1. The slag layer can be cleaned off by the external cleaning device.

[0030] 3. The conical guide plate 7 can block and divert the molten steel, extending the flow path of the molten steel. This not only promotes the combination and floating of slag inclusions between the molten steel, but also prevents the molten steel from being discharged directly from the discharge port 6. This prolongs the residence time of the molten steel in the tundish, allowing the slag inside to float and precipitate better, thereby improving the purity of the molten steel.

[0031] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.

Claims

1. A stopper wall for a continuous casting tundish, comprising a first wall (1) and a second wall (2), characterized in that: The first wall (1) and the second wall (2) are vertically corresponding and the connecting part is provided with a clamping mechanism, the front of the first wall (1) is fixedly connected with a reinforcing plate (3) and the top of the front of the first wall (1) is provided with an inclined overflow port (4), the top of the first wall (1) is provided with an adjusting mechanism and the movable end of the adjusting mechanism is provided with a cyclone pipe (5) for guiding the flow of molten iron, the bottom of the side of the second wall (2) is provided with a discharge port (6) for discharging molten iron and the front of the second wall (2) is fixedly connected with a conical flow guide plate (7) near the discharge port (6).

2. A stopper wall for a continuous casting tundish according to claim 1, characterized in that: The two sides of the first wall (1) and the second wall (2) are both outwardly expanded structures capable of enhancing the impact resistance of the first wall (1) and the second wall (2), and the highest part of the overflow port (4) near the side of the front of the first wall (1) is lower than the lowest part of the side of the back of the first wall (1).

3. A stopper wall for a continuous casting tundish according to claim 1, characterized in that: The back of the second wall (2) is fixedly connected with four triangular support plates (8) which are fixedly connected at the bottom of the back of the second wall (2).

4. A stopper wall for a continuous casting tundish according to claim 1, characterized in that: The clamping mechanism comprises a trapezoidal clamping block (9), a trapezoidal clamping groove (10), an end clamping block (11) and an end clamping groove (12), the trapezoidal clamping block (9) is fixedly connected at the bottom of the first wall (1), the trapezoidal clamping groove (10) is formed at the top of the second wall (2) corresponding to the trapezoidal clamping block (9), the trapezoidal clamping block (9) is inserted into the trapezoidal clamping groove (10), the narrow part of the trapezoidal clamping block (9) and the trapezoidal clamping groove (10) are close to the back of the first wall (1) and the second wall (2), the end clamping block (11) and the end clamping groove (12) are both two, the two end clamping blocks (11) are fixedly connected at the two sides of the bottom of the first wall (1), the two end clamping grooves (12) are formed at the two sides of the top of the second wall (2) and vertically correspond to the two end clamping blocks (11), and the end clamping block (11) is inserted into the corresponding end clamping groove (12).

5. A stopper wall for a continuous casting tundish according to claim 1, characterized in that: The adjusting mechanism comprises a first fixed pipe (13), a horizontal adjusting rod (14), a second fixed pipe (15), a vertical adjusting rod (16) and a sleeve ring (17), the first fixed pipe (13) is fixedly connected at the top of the first wall (1), the horizontal adjusting rod (14) is horizontally arranged in the first fixed pipe (13), the second fixed pipe (15) is fixedly connected at one end of the horizontal adjusting rod (14) close to the front of the first wall (1), the vertical adjusting rod (16) is vertically arranged in the second fixed pipe (15), the sleeve ring (17) is fixedly connected at the bottom end of the vertical adjusting rod (16), the side of the first fixed pipe (13) and the second fixed pipe (15) is threadedly provided with a fixed knob (18), and the two fixed knobs (18) are respectively in abutment with the horizontal adjusting rod (14) and the vertical adjusting rod (16).

6. A stopper wall for a continuous casting tundish according to claim 5, characterized in that: The cyclone pipe (5) comprises a flow guide pipe (19) and a cyclone plate (20), the cyclone plate (20) is helical and fixedly connected in the inside of the flow guide pipe (19), and the flow guide pipe (19) is fixedly connected in the inside of the sleeve ring (17) and horizontally corresponds to the reinforcing plate (3).

7. A stopper wall for a continuous casting tundish according to claim 1, characterized in that: The number of the discharge ports (6) and the conical flow guide plates (7) is several, and the several conical flow guide plates (7) correspond to the several discharge ports (6) respectively, the conical flow guide plate (7) horizontally corresponds to the discharge port (6) and is fixedly connected to one end of the discharge port (6) close to the front of the second wall body (2).

Images