Current stabilizer for continuous casting tundish

Abstract

The utility model discloses a current stabilizer for a continuous casting tundish, which relates to the technical field of tundish current stabilizers and comprises a current stabilizer wall, a lower impact block is arranged at the bottom end of the current stabilizer wall, an upper impact block is arranged at the top of the lower impact block, and a convex circle is arranged at the center of the upper surface of the upper impact block. A through hole is formed in the upper portion of the inner side of the flow stabilizer wall, a hollow inner cavity is formed in the bottom of the through hole, the side wall of the hollow inner cavity is of a cambered surface structure, centrosymmetric supporting ribs are arranged on the periphery of the protruding circle, one end of each supporting rib is connected with the protruding circle, and the other end of each supporting rib is connected with the side wall of the hollow inner cavity. The impact plate is simple in structure, high in erosion resistance and good in structural stability, floating of the impact plate is avoided, and the service life of the tundish is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of tundish flow stabilizers, in particular to a flow stabilizer for a continuous casting tundish. Background Art

[0002] The tundish flow stabilizer plays an important role in the continuous casting production process. Through its unique design and function, the tundish flow stabilizer effectively optimizes the continuous casting process, improves the quality of molten steel and the efficiency of continuous casting operations. In order to resist the scouring and erosion of molten steel at the steel ladle's long nozzle landing point, the bottom of the flow stabilizer is often inlaid with impact plates made of aluminum carbon, corundum, etc. The impact plate in the tundish flow stabilizer plays an important role in resisting the impact of molten steel, protecting the tundish structure and improving the service life. It is an indispensable key component in the continuous casting process.

[0003] During the use of the impact plate at the bottom of the tundish flow stabilizer, the flow stabilizer wall has a relatively low erosion resistance. After being eroded by the recoil molten steel for a long time, the impact plate often floats up, which may cause safety accidents such as molten steel penetrating the tundish, resulting in the emergency offline of the tundish, bringing certain economic losses and personnel and safety risks, and also affecting the product quality of the steel billet. Therefore, it is very necessary to provide a flow stabilizer for a continuous casting tundish with a reasonable design, strong erosion resistance, long service life and avoidance of impact plate floating. Summary of the invention

[0004] The utility model aims to overcome the shortcomings of the prior art and to provide a flow stabilizer for a continuous casting tundish which has reasonable design, strong corrosion resistance, long service life and can prevent the impact plate from floating.

[0005] The purpose of the utility model is achieved as follows: a flow stabilizer for a continuous casting tundish, comprising a flow stabilizer wall, a lower impact block is arranged at the bottom end of the flow stabilizer wall, an upper impact block is arranged on the top of the lower impact block, a raised circle is arranged at the center position of the upper surface of the upper impact block, a through hole is arranged at the upper inner side of the flow stabilizer wall, a hollow inner cavity is arranged at the bottom of the through hole, the side wall of the hollow inner cavity is an arc surface structure, and centrally symmetrical supporting ribs are arranged around the outer periphery of the raised circle, one end of the supporting rib is connected to the raised circle, and the other end is connected to the side wall of the hollow inner cavity.

[0006] Preferably, the centers of the upper impact block and the lower impact block are aligned.

[0007] Preferably, the number of the support ribs is six, and the cross-section of the support ribs is a normally distributed shape.

[0008] Preferably, the curvature of the single support rib is 60°, and the ratio of the height to the width of the support rib is 0.28:1 to 0.48:1.

[0009] Preferably, the raised circle is a drum surface with a diameter of 200 to 260 mm, and the ratio of the center height of the raised circle to the diameter of the upper impact block is 0.09:1 to 0.10:1.

[0010] Preferably, the curvature of the arc surface of the side wall of the hollow inner cavity is 66-70°.

[0011] Preferably, the diameter of the lower impact block is 40-60 mm larger than the diameter of the upper impact block, and the diameter difference between the lower impact block and the upper impact block forms a stepped structure.

[0012] Preferably, the diameter of the through hole is the same as the diameter of the upper impact block, and the through hole is aligned with the center of the upper impact block.

[0013] Preferably, the lower impact block and the upper impact block are formed by machine pressing using magnesium carbon or corundum materials.

[0014] Preferably, the flow stabilizer wall and the supporting ribs are cast by corundum castable material or magnesium castable material.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The utility model adopts support ribs with a normally distributed cross section. The cross-sectional structure can distribute pressure more evenly when subjected to stress, which can reduce local stress concentration and the risk of crack initiation and expansion, thereby enhancing the stability of the overall structure, slowing down the scouring of the support ribs by molten steel, and helping to improve the service life and reliability of the flow stabilizer;

[0017] 2. The utility model adopts a stepped step design between the upper impact block and the lower impact block. Even if the upper impact plate floats upward, the lower impact plate still has good fixity around it, avoiding the lower impact plate from floating upward, thereby preventing safety accidents. Moreover, the upper impact block is aligned with the center of the lower impact block, which ensures the stability of the impact block structure on the one hand, and avoids the lower impact block from being washed by molten steel on the other hand, further improving the service life of the flow stabilizer;

[0018] 3. The side wall of the hollow inner cavity of the utility model adopts an arc surface design. During the process of molten steel swirling inside the hollow wall, the arc surface of the inner wall is basically consistent with the swirling direction of the molten steel. This consistency can reduce the reaction force of the molten steel on the inner wall of the inner cavity. The reduction of the reaction force further reduces the scouring effect of the sharp turbulence on the side wall of the hollow inner cavity, thereby avoiding serious erosion around the impact plate and in the downward direction, resulting in the lack of support around the impact plate and floating upward, thereby improving the erosion resistance. At the same time, the curvature of the arc surface is designed to be 66-70°, which can optimize the flow path of the molten steel in the tundish to the greatest extent, prolong the average residence time of the molten steel, and is conducive to the floating and removal of non-metallic inclusions in the molten steel, thereby improving the molten steel flow field in the tundish and achieving the purpose of purifying the molten steel.

[0019] In general, the utility model has reasonable design, strong corrosion resistance, good structural stability, avoids floating of the impact plate, and increases the service life of the tundish. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a three-dimensional schematic diagram of a flow stabilizer for a continuous casting tundish.

[0021] Figure 2 The utility model is a top view of a flow stabilizer for a continuous casting tundish.

[0022] Figure 3 The utility model is a structural schematic diagram of a flow stabilizer for a continuous casting tundish.

[0023] Figure 4 The utility model is a cross-sectional schematic diagram of a flow stabilizer support rib for a continuous casting tundish.

[0024] In the figure: 1. Flow stabilizer wall 2. Hollow inner cavity 3. Lower impact block 4. Upper impact block 5. Raised circle 6. Support rib 7. Through hole. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention, and the technical solution of the present invention is further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0026] like Figure 1-4 As shown, a flow stabilizer for a continuous casting tundish comprises a flow stabilizer wall 1, a lower impact block 3 is arranged at the bottom end of the flow stabilizer wall 1, an upper impact block 4 is arranged on the top of the lower impact block 3, a raised circle 5 is arranged at the center position of the upper surface of the upper impact block 4, a through hole 7 is arranged at the upper inner side of the flow stabilizer wall 1, a hollow inner cavity 2 is arranged at the bottom of the through hole 7, the side wall of the hollow inner cavity 2 is an arc surface structure, and centrally symmetrical supporting ribs 6 are arranged on the periphery of the raised circle 5, one end of the supporting rib 6 is connected to the raised circle 5, and the other end is connected to the side wall of the hollow inner cavity 2.

[0027] The upper impact block 4 is aligned with the center of the lower impact block 3, which ensures the stability of the impact block structure on the one hand, and prevents the lower impact block 3 from being eroded by molten steel on the other hand, further improving the service life of the flow stabilizer.

[0028] There are six support ribs 6 , the cross section of the support rib 6 is a normally distributed shape, the curvature of a single support rib 6 is 60°, and the ratio of the height to the width of the support rib 6 is 0.28:1 to 0.48:1.

[0029] By using support ribs 6 with a normally distributed cross-section, the cross-sectional structure can distribute pressure more evenly when subjected to stress, thereby reducing local stress concentration and the risk of crack initiation and expansion, thereby enhancing the stability of the overall structure, slowing down the scouring of the support ribs 6 by molten steel, and helping to improve the service life and reliability of the flow stabilizer.

[0030] The raised circle 5 is a drum surface with a diameter of 200 to 260 mm, and the ratio of the center height of the raised circle 5 to the diameter of the upper impact block 4 is 0.09:1 to 0.10:1.

[0031] The design of the raised circle 5 can change the flow trajectory of the molten steel in the flow stabilizer, causing the molten steel to generate more eddies and turbulence during the flow process. These eddies and turbulence help the inclusions in the molten steel to float to the surface of the molten steel, thereby being removed by subsequent purification equipment. At the same time, it can also change the flow state of the molten steel in the flow stabilizer, making the flow of the molten steel more uniform and stable, which helps to reduce eddies and dead corners in the molten steel in the flow stabilizer, optimize the molten steel flow field, and improve the quality of cast steel.

[0032] Among them, the curvature of the arc surface of the side wall of the hollow inner cavity 2 is 66 to 70°, which can optimize the flow path of the molten steel in the ladle to the greatest extent, extend the average residence time of the molten steel, and facilitate the floating and removal of non-metallic inclusions in the molten steel, thereby improving the flow field of the molten steel in the ladle and achieving the purpose of purifying the molten steel.

[0033] The diameter of the lower impact block 3 is 40-60 mm larger than that of the upper impact block 4 , and the diameter difference between the lower impact block 3 and the upper impact block 4 forms a stepped structure.

[0034] The stepped step design is adopted. Even if the upper impact plate drifts upward, the lower impact plate still has good fixity around it, avoiding the lower impact plate from drifting upward, which may lead to safety accidents.

[0035] Among them, the diameter of the through hole 7 is the same as the diameter of the upper impact block 4, and the through hole 7 is aligned with the center of the upper impact block 4. When the molten steel is poured, it is ensured that the molten steel can all impact on the raised circle 5 and the upper impact block 4, avoiding the lower impact block 3 from being directly eroded by the molten steel, thereby improving the service life of the flow stabilizer.

[0036] Among them, the lower impact block 3 and the upper impact block 4 are machine-pressed with magnesium-carbon or corundum materials, and the flow stabilizer wall 1 and the supporting ribs 6 are cast with corundum castable or magnesium castable, which ensures the stability of the overall structure of the flow stabilizer, can better resist the impact from molten steel, and further improves the service life of the flow stabilizer.

[0037] The working principle of the utility model is as follows:

[0038] When the utility model is in use, when the molten steel in the ladle falls vertically to impact the flow stabilizer, the molten steel impacts the raised circle 5 and then turns around. Under the action of the supporting ribs 6, the turned molten steel moves upward in an orderly manner. The cross-sectional structure of the supporting ribs 6 makes the molten steel scour mainly on the upper impact plate, which slows down the scouring of the upper impact plate and the side wall of the hollow inner cavity 2. The molten steel diverted by the supporting ribs 6 turns upward along the arc surface of the side wall of the hollow inner cavity 2, thereby ensuring the stable use of the flow stabilizer and avoiding the occurrence of the floating phenomenon of the impact plate during use. In addition, during the movement of the molten steel, the floating process of harmful inclusions in the molten steel is also increased, and the turbulence phenomenon of the molten steel in the impact zone is weakened, thereby achieving the purpose of purifying the molten steel.

[0039] In general, the utility model has reasonable design, strong corrosion resistance, good structural stability, avoids floating of the impact plate, and increases the service life of the tundish.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A flow stabilizer for a continuous casting tundish, comprising a flow stabilizer wall (1), characterized in that: A lower impact block (3) is arranged at the bottom end of the flow stabilizer wall (1), an upper impact block (4) is arranged on the top of the lower impact block (3), a raised circle (5) is arranged at the center position of the upper surface of the upper impact block (4), a through hole (7) is arranged at the upper inner part of the flow stabilizer wall (1), a hollow inner cavity (2) is arranged at the bottom of the through hole (7), the side wall of the hollow inner cavity (2) is a curved surface structure, and a centrally symmetrical supporting rib (6) is arranged around the outer periphery of the raised circle (5), one end of the supporting rib (6) is connected to the raised circle (5), and the other end is connected to the side wall of the hollow inner cavity (2).

2. A flow stabilizer for continuous casting tundish according to claim 1, characterized in that: The upper impact block (4) is aligned with the center of the lower impact block (3).

3. A flow stabilizer for continuous casting tundish according to claim 1, characterized in that: The number of the supporting ribs (6) is six, and the cross-section of the supporting ribs (6) is a normally distributed shape.

4. A flow stabilizer for continuous casting tundish according to claim 3, characterized in that: The curvature of the single support rib (6) is 60°, and the ratio of the height to the width of the support rib (6) is 0.28:1 to 0.48:

1.

5. The flow stabilizer for continuous casting tundish according to claim 1, characterized in that: The raised circle (5) is a drum surface with a diameter of 200 to 260 mm, and the ratio of the center height of the raised circle (5) to the diameter of the upper impact block (4) is 0.09:1 to 0.10:

1.

6. The flow stabilizer for continuous casting tundish according to claim 1, characterized in that: The arc angle of the arc surface of the side wall of the hollow inner cavity (2) is 66-70°.

7. The flow stabilizer for continuous casting tundish according to claim 1, characterized in that: The diameter of the lower impact block (3) is 40 to 60 mm larger than the diameter of the upper impact block (4), and the diameter difference between the lower impact block (3) and the upper impact block (4) forms a stepped structure.

8. The flow stabilizer for continuous casting tundish according to claim 1, characterized in that: The diameter of the through hole (7) is the same as the diameter of the upper impact block (4), and the through hole (7) is aligned with the center of the upper impact block (4).

9. A flow stabilizer for continuous casting tundish according to claim 2, characterized in that: The lower impact block (3) and the upper impact block (4) are formed by machine pressing using magnesium carbon or corundum materials.

10. The flow stabilizer for continuous casting tundish according to claim 1, characterized in that: The flow stabilizer wall (1) and the supporting ribs (6) are cast by corundum casting material or magnesium casting material.

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