Novel tundish slag blocking wall

Abstract

The utility model discloses a novel tundish slag retaining wall, which relates to the technical field of steel smelting continuous casting refractory materials and comprises a wall body, a lifting lug is arranged at the top of the wall body, a plurality of retaining wall holes are arranged on the lower portion of the wall body, and wave-shaped protrusions arranged regularly are arranged between the wall body and the retaining wall holes. The wavy protrusions are arranged on one side of an impact area of the wall body, a plurality of connecting columns perpendicular to one another are arranged in the wall body, reinforcing blocks B are arranged in horizontal sections of the connecting columns, reinforcing blocks A are arranged in vertical sections of the connecting columns, the reinforcing blocks B are fixedly connected with the top ends of the wavy protrusions, and the reinforcing blocks A are fixedly connected with the top ends of the wavy protrusions. The tundish slag blocking wall is reasonable in design, good in flow stabilizing effect, capable of promoting floating of inclusions, good in cleanliness of molten steel, long in service life and capable of adapting to various complex working conditions, and the stability and the use safety of the whole structure of the tundish slag blocking wall are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous casting refractory materials for steel smelting, and particularly relates to a novel tundish slag dam wall. Background Art

[0002] Hot-rolled strip steel can be used as a finished product or a raw material for subsequent cold rolling. Currently, its demand continues to grow worldwide, especially at a rapid pace in Asia. The short-process continuous casting and rolling production technology has become the development trend of future iron and steel metallurgy and has developed rapidly in China. The tundishes used in short-process continuous casting and rolling production all have a common feature: the drawing speed is extremely high. A high drawing speed in the tundish will cause large fluctuations in the liquid level in the tundish impact zone, making it easy to entrap slag, and the residence time of molten steel in the tundish is relatively short, which is not conducive to the floating of inclusions;

[0003] The tundish slag dam wall plays a crucial role in the continuous casting process. However, for the existing tundish slag dam wall facing the tundish impact zone with large fluctuations, its flow stabilizing effect and the optimization of the molten steel flow field can no longer meet the requirements. At the same time, during the use process of the slag dam wall, the molten steel continuously impacts it, and the overall structure of the slag dam wall will also be damaged. In severe cases, there will be a risk of being taken out of service, affecting its service life and working efficiency. Therefore, it is very necessary to provide a novel tundish slag dam wall with reasonable design, good flow stabilizing effect, long service life, and capable of promoting the floating of inclusions. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a novel tundish slag dam wall with reasonable design, good flow stabilizing effect, long service life, and capable of promoting the floating of inclusions.

[0005] The purpose of the utility model is achieved as follows: A novel tundish slag dam wall, which includes a wall body. There are lifting lugs arranged at the top of the wall body. A number of dam wall holes are opened at the lower part of the wall body. There are wavy protrusions arranged in a regular pattern between the wall body and the dam wall holes. The wavy protrusions are arranged on one side of the impact zone of the wall body. A number of mutually perpendicular connecting columns are arranged inside the wall body. There is a reinforcing block B inside the horizontal section of the connecting column, and there is a reinforcing block A inside the vertical section of the connecting column. The reinforcing block B is fixedly connected to the top end of the wavy protrusion, and the reinforcing block A is fixedly connected to the bottom end of the wavy protrusion.

[0006] Preferably, the connecting columns, the reinforcing block A, and the reinforcing block B are all made of high-strength alloy steel.

[0007] Preferably, the connecting columns and the wall body are cast with fire clay, and the connection methods of the reinforcing block A and the reinforcing block B to the connecting columns are both welding.

[0008] Preferably, the reinforcing block A is connected to the bottom end of the wavy protrusion, and the reinforcing block B is connected to the top end of the wavy protrusion by high-strength alloy bolts. Threaded holes are provided at the positions where the top and bottom ends of the wavy protrusion are perpendicular to the wall, the reinforcing block A, and the reinforcing block B. The high-strength alloy bolts pass through the threaded holes and are threadedly connected to the reinforcing block A and the reinforcing block B.

[0009] Preferably, the number of the wavy protrusions is at least 1, and the wavy protrusions are arranged in a single layer or multiple layers. When arranged in multiple layers, the protrusion thickness of the upper-layer wavy protrusion is at least 20 mm more than that of the lower-layer wavy protrusion, and the multiple-layer wavy protrusions form a stepped structure.

[0010] Preferably, the height of the wavy protrusion > 40 mm.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1. The present utility model adopts a stepped wavy protrusion on one side of the impact area of the slag retaining wall. From the aspect of optimizing the tundish flow field, through the stepped buffering formed by the multi-layer wavy protrusions, the flow is gradually stabilized and the flow direction of the molten steel is changed, which can effectively relieve the impact of the molten steel, reduce the fluctuation of the molten steel in the impact area, extend the residence time of the molten steel, provide more time for the floating of inclusions, promote the floating of inclusions, and improve the cleanliness of the molten steel;

[0013] 2. The present utility model adopts mutually perpendicular reinforcing block A and reinforcing block B inside the wall. The mutually perpendicular layout enables the reinforcing plate to more effectively disperse the stress received by the wall, avoiding the occurrence of stress concentration. The design of the reinforcing block reduces the direct scouring and erosion of the molten steel and slag on the wall to a certain extent, reduces the wear speed of the wall, helps to extend the service life of the wall, improves the stability and safety of use of the entire structure of the tundish slag retaining wall, can effectively enhance the overall bearing capacity of the tundish wall, and can adapt to various complex working conditions;

[0014] 3. The present utility model uses high-strength alloy bolts and reinforcing plates with threaded holes to fix the wavy protrusions, effectively enhancing the connection strength between the wall and the wavy protrusions, preventing loosening or falling off caused by external forces, significantly improving the overall stability of the wall, facilitating the timely replacement of a damaged layer of wavy protrusions, and enabling the free selection of installing one or multiple layers of wavy protrusions under different working conditions, with convenient disassembly and assembly, improving work efficiency. At the same time, high-strength bolts and reinforcing plates usually have good high-temperature resistance and can maintain stable mechanical properties in a high-temperature environment, ensuring the reliability and safety of the connection.

[0015] Generally, the utility model is reasonably designed, has a good flow-stabilizing effect, promotes the floating of inclusions, has good cleanliness of molten steel, has a long service life, improves the stability and use safety of the entire structure of the tundish slag dam, and can adapt to various complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of a novel tundish slag dam of the utility model.

[0017] Figure 2 is a schematic connection view of the wavy protrusions of a novel tundish slag dam of the utility model.

[0018] Figure 3 is a side view of a novel tundish slag dam of the utility model.

[0019] Figure 4 is a novel tundish slag dam of the utility model Figure 3 partial enlarged view at A of.

[0020] Figure 5 is a top view of a novel tundish slag dam of the utility model.

[0021] Figure 6 is a schematic sectional view of a novel tundish slag dam of the utility model.

[0022] In the figure: 1. Wall body; 2. Lifting lug; 3. Wavy protrusion; 4. Dam wall hole; 5. Connecting column; 6. High-strength alloy bolt; 7. Reinforcing block A; 8. Reinforcing block B; 9. Threaded hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following are specific embodiments of the utility model, and the technical solutions of the utility model are further described in conjunction with the accompanying drawings, but the utility model is not limited to these embodiments.

[0024] As Figure 1-6 shown, a novel tundish slag dam includes a wall body 1, a lifting lug 2 is arranged at the top of the wall body 1, a plurality of dam wall holes 4 are opened at the lower part of the wall body 1, a plurality of wavy protrusions 3 arranged in a regular pattern are arranged between the wall body 1 and the dam wall holes 4, the wavy protrusions 3 are arranged on one side of the impact area of the wall body 1, a plurality of mutually perpendicular connecting columns 5 are arranged inside the wall body 1, a reinforcing block B8 is arranged inside the horizontal section of the connecting column 5, a reinforcing block A7 is arranged inside the vertical section of the connecting column 5, the reinforcing block B8 is fixedly connected to the top end of the wavy protrusion 3, and the reinforcing block A7 is fixedly connected to the bottom end of the wavy protrusion 3.

[0025] The connecting column 5 adopts a structure design perpendicular to each other, which can improve the stability of the structure of the wall 1. By arranging the mutually perpendicular reinforcing blocks A7 and reinforcing blocks B8 inside the wall 1, the perpendicular layout enables the reinforcing plate to more effectively disperse the stress received by the wall 1, avoiding the occurrence of stress concentration. The design of the reinforcing blocks reduces the direct scouring and erosion effects of molten steel and slag on the wall 1 to a certain extent, reduces the wear rate of the wall 1, helps to extend the service life of the wall 1, improves the stability and use safety of the entire structure of the tundish slag retaining wall, can effectively enhance the overall bearing capacity of the tundish wall 1, and can adapt to various complex working conditions.

[0026] Among them, the connecting column 5, the reinforcing block A7 and the reinforcing block B8 are all made of high-strength alloy steel. The purpose of this design is that the reinforcing blocks made of high-strength alloy steel have good wear resistance and erosion resistance, can reduce the scouring and erosion effects of molten steel and slag on the slag retaining wall, reduce the wear rate of the slag retaining wall, and thus extend its service life.

[0027] Among them, the connecting column 5 and the wall 1 are poured with fire clay, and the connection methods of the reinforcing block A7 and the reinforcing block B8 to the connecting column 5 are both welding. The purpose of this design further improves the stability of the overall structure of the tundish slag retaining wall and effectively extends the service life.

[0028] Among them, the reinforcing block A7 and the bottom end of the wavy protrusion 3, and the reinforcing block B8 and the top end of the wavy protrusion 3 are both connected by high-strength alloy bolts 6. Threaded holes 9 are opened at the positions where the top end and the bottom end of the wavy protrusion 3 are perpendicular to the wall 1, the reinforcing block A7 and the reinforcing block B8. The high-strength alloy bolts 6 pass through the threaded holes 9 and are threadedly connected to the reinforcing block A7 and the reinforcing block B8.

[0029] Using high-strength alloy bolts 6 and reinforcing plates with threaded holes 9 to fix the wavy protrusion 3 effectively enhances the connection strength between the wall 1 and the wavy protrusion 3, prevents loosening or falling off caused by external forces, can significantly improve the overall stability of the wall 1, facilitates the timely replacement of a damaged layer of the wavy protrusion 3, and can freely choose to install one layer or multiple layers of wavy protrusions 3 under different working conditions, with convenient disassembly and assembly, improving work efficiency. At the same time, high-strength bolts and reinforcing plates usually have good high-temperature resistance and can maintain stable mechanical properties in a high-temperature environment, ensuring the reliability and safety of the connection.

[0030] Among them, the number of the wavy protrusions 3 is at least 1, and the wavy protrusions 3 are arranged in a single layer or multiple layers. When arranged in multiple layers, the protruding thickness of the upper-layer wavy protrusion 3 is at least 20 mm more than that of the lower-layer wavy protrusion 3. The multiple-layer wavy protrusions 3 form a stepped structure, and the height of the wavy protrusion 3 > 40 mm.

[0031] A stepped wavy protrusion 3 is provided on one side of the impact zone of the slag retaining wall. From the aspect of optimizing the tundish flow field, a stepped buffer is formed by multiple layers of wavy protrusions 3 to gradually stabilize the flow and change the flow direction of the molten steel, which can effectively relieve the impact of the molten steel, reduce the fluctuation of the molten steel in the impact zone, extend the residence time of the molten steel, provide more time for the floating of inclusions, promote the floating of inclusions, and improve the cleanliness of the molten steel.

[0032] The working principle of the present utility model is as follows:

[0033] When the present utility model is in use, the number of wavy protrusions 3 and the number of reinforcement blocks A7 and reinforcement blocks B8 in the wall 1 can be determined according to the specific working conditions on site. When the impact force of the molten steel is large or in complex working conditions, a multi-layer wavy protrusion 3 structure can be adopted on one side of the impact zone of the tundish wall 1, and the number of reinforcement blocks A7 and reinforcement blocks B8 can be appropriately increased. The reinforcement blocks can, to a certain extent, reduce the direct scouring and erosion of the molten steel and slag on the wall 1, reduce the wear rate of the wall 1, help extend the service life of the wall 1, improve the stability and safety of use of the entire structure of the tundish slag retaining wall. By forming a stepped buffer through multiple layers of wavy protrusions 3 to gradually stabilize the flow and change the flow direction of the molten steel, it can effectively relieve the impact of the molten steel, reduce the fluctuation of the molten steel in the impact zone, extend the residence time of the molten steel, and promote the floating of inclusions and the effect of purifying the molten steel.

[0034] Generally, the present utility model is reasonably designed, has a good flow stabilizing effect, promotes the floating of inclusions, has good cleanliness of the molten steel, has a long service life, improves the stability and safety of use of the entire structure of the tundish slag retaining wall, and can adapt to various complex working conditions.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A novel tundish slag retaining wall, comprising a wall body (1), a lifting lug (2) being arranged at the top of the wall body (1), and a plurality of retaining wall holes (4) being opened at the bottom of the wall body (1), characterized in that: A regularly arranged wave-shaped protrusion (3) is provided between the wall (1) and the retaining wall hole (4); the wave-shaped protrusion (3) is provided on one side of the impact zone of the wall (1); a plurality of mutually perpendicular connecting columns (5) are provided inside the wall (1); a reinforcing block B (8) is provided inside the horizontal section of the connecting column (5); a reinforcing block A (7) is provided inside the vertical section of the connecting column (5); the reinforcing block B (8) is fixedly connected to the top end of the wave-shaped protrusion (3); and the reinforcing block A (7) is fixedly connected to the bottom end of the wave-shaped protrusion (3).

2. A novel tundish slag retaining wall according to claim 1, characterized in that: The connecting column (5), the reinforcing block A (7) and the reinforcing block B (8) are all made of high-strength alloy steel.

3. A novel tundish slag retaining wall according to claim 2, characterized in that: The connection column (5) and the wall (1) are cast by fire clay, and the reinforcement block A (7) and the reinforcement block B (8) are connected to the connection column (5) by welding.

4. A novel tundish slag retaining wall according to claim 3, characterized in that: The reinforcing block A (7) is connected to the bottom end of the wavy protrusion (3), and the reinforcing block B (8) is connected to the top end of the wavy protrusion (3) via high-strength alloy bolts (6); threaded holes (9) are provided at the top and bottom ends of the wavy protrusion (3) perpendicular to the wall (1), and at the positions of the reinforcing block A (7) and the reinforcing block B (8); the high-strength alloy bolts (6) pass through the threaded holes (9) and are threadedly connected to the reinforcing block A (7) and the reinforcing block B (8).

5. The novel tundish slag retaining wall according to claim 1 is characterized by: The number of the wavy protrusions (3) is at least one, and the wavy protrusions (3) are arranged in a single layer or a multi-layer layout. When arranged in a multi-layer layout, the protrusion thickness of the upper layer of wavy protrusions (3) is at least 20 mm greater than that of the lower layer of wavy protrusions (3), and the multi-layer wavy protrusions (3) form a stepped structure.

6. A novel tundish slag retaining wall according to claim 5, characterized in that: The height of the wave-shaped protrusion (3) is >40 mm.

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