Continuous casting tundish stopper rod

Abstract

The utility model relates to a continuous casting tundish stopper rod, and belongs to the technical field of continuous casting refractory materials in the metallurgical industry. According to the technical scheme, the slag line protection rod comprises a rod head (1), a rod body (2) and a slag line protection ring (3), the rod head (1) is conical, the rod body (2) is in a stepped cylindrical shape, the rod head (1) and the end, with the larger diameter, of the rod body (2) are connected into an integrated structure, and the end, with the smaller diameter, of the rod body (2) is sleeved with the slag line protection ring (3); the diameter phi of the rod body (2) is 155-165 mm, and the height of the rod body (2) is matched with the height of the liquid level of the tundish. The step part of the rod body (2) is the slag line part of the tundish stopper rod; the inner diameter of the slag line protection ring (3) is 1-2mm larger than that of the end, with the smaller diameter, of the rod body (2); and the height of the slag line protection ring (3) is equal to the height of the liquid level of molten steel in the tundish. The utility model can stably control the underwater flow of the tundish steel, and has the advantages of low manufacturing cost, high strength and long service life.

Description

Technical Field

[0001] The utility model relates to a stopper rod for a continuous casting tundish, belonging to the technical field of refractory materials for continuous casting in the metallurgical industry. Background Technique

[0002] In the continuous casting production process, the tundish is an important metallurgical reactor, which plays metallurgical functions such as pressure reduction, flow stabilization, purification, and flow diversion. The stopper rod is an important flow control device in the metallurgical process of the continuous casting tundish. It is one of the "three major parts" of continuous casting, used to control the molten steel flow from the tundish to the mold and the liquid level height of the mold. It is a functional refractory material for continuous casting. It is of great significance for improving the service life of the continuous casting tundish, reducing the consumption of refractory materials, reducing the tundish residue, and improving the quality of molten steel. The improvement of the tundish service life depends on the support of the stopper rod. Therefore, it is necessary to propose a stopper rod for continuous casting in steelmaking with low manufacturing cost, high strength, and long service life. Content of the Utility Model

[0003] The purpose of the utility model is to provide a stopper rod for continuous casting in steelmaking, which can stably control the downward flow of molten steel in the tundish, has low manufacturing cost, high strength, and long service life, and solves the problems existing in the background technique.

[0004] The technical solution of the utility model is as follows:

[0005] A stopper rod for a continuous casting tundish includes a rod head, a rod body, and a slag line protection ring. The rod head is conical, the rod body is a stepped cylindrical shape, the larger-diameter end of the rod head is integrally connected to the rod body, and the slag line protection ring is sleeved on the smaller-diameter end of the rod body.

[0006] The diameter of the rod body is Φ155 - 165mm, and the height of the rod body matches the liquid level height of the tundish.

[0007] The stepped part of the rod body is the slag line part of the stopper rod for the continuous casting tundish.

[0008] The inner diameter of the slag line protection ring is 1 - 2mm thicker than the smaller-diameter end of the rod body.

[0009] The height of the slag line protection ring is the liquid level height of the molten steel in the tundish.

[0010] The liquid level height of the molten steel in the tundish is 200 - 400mm.

[0011] The wall thickness of the slag line protection ring is 20 - 40mm.

[0012] The beneficial effects of the utility model are as follows:

[0013] (1) The rod head of the stopper rod adopts a conical structure, which can stably control the downward flow of molten steel in the tundish;

[0014] (2) The rod body and the rod head are made of the same material, which can ensure the strength of the stopper rod body and reduce fracture accidents; the rod body does not need to consider high corrosion resistance, thus reducing the manufacturing cost of the stopper rod.

[0015] (3) The slag line protection ring is specifically used to resist the erosion of molten steel slag, thereby improving the service life of the stopper rod.

[0016] (4) The service life of the stopper rod provided by the present utility model has reached more than 131 hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural view of the present utility model;

[0018] Figure 2 It is a schematic structural view of the rod body and the rod head of the present utility model;

[0019] Figure 3 It is a schematic view of the slag line protection ring of the present utility model;

[0020] In the figure: rod head 1, rod body 2, slag line protection ring 3. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further illustrates the present utility model through examples in conjunction with the accompanying drawings.

[0022] Referring to the attached Figures 1 - 3 , a continuous casting tundish stopper rod, comprising a rod head 1, a rod body 2 and a slag line protection ring 3. The rod head 1 is conical, the rod body 2 is stepped cylindrical, and the larger diameter end of the rod head 1 and the rod body 2 are connected into an integral structure. The slag line protection ring 3 is sleeved on the smaller diameter end of the rod body 2.

[0023] In this embodiment, referring to the attached Figures 1 - 3 , the rod head 1 is conical in shape, made of composite material, integrally formed with the rod body 2, and is located at the lower part of the rod body 2.

[0024] The rod body 2 and the rod head 1 are integrally formed of the same material, and this material only needs to meet the working strength requirements of the stopper rod and a certain corrosion resistance, and does not need to meet high corrosion resistance. The diameter of the rod body 2 is Φ155 - 165mm, and the height requirement meets the tundish liquid level height. When forming the rod body 2 below the slag line part, a protrusion is made, that is, it is stepped, to prevent the slag line protection ring from falling off.

[0025] The slag line protection ring 3, its height is the active height of the molten steel liquid level in the tundish, with a height of 200 - 400mm. The slag line protection ring 3 needs to be made of high corrosion-resistant material and formed. The inner diameter requirement is Φ156 - 167mm, and the wall thickness requirement is 20 - 40mm. After the rod body 2 and the slag line protection ring 3 are respectively formed, refractory mud is applied inside the slag line protection ring 3, and then it is sleeved on the periphery of the slag line part of the stopper rod body 2, so as to play an anti-erosion role.

Claims

1. A continuous casting tundish plug rod, characterized in that: The rod head (1) comprises a rod body (2) and a slag line protection ring (3); the rod head (1) is conical, the rod body (2) is stepped cylindrical, the rod head (1) and the end of the rod body (2) with a larger diameter are connected to form an integral structure, and the slag line protection ring (3) is sleeved on the end of the rod body (2) with a smaller diameter.

2. The continuous casting tundish plug rod according to claim 1, characterized in that: The diameter of the rod body (2) is Φ155-165 mm, and the height of the rod body (2) matches the height of the liquid level in the tundish.

3. The continuous casting tundish plug rod according to claim 2, characterized in that: The stepped portion of the rod body (2) is the slag line portion of the tundish plugger rod.

4. The continuous casting tundish plug rod according to claim 1, characterized in that: The inner diameter of the slag line protection ring (3) is 1-2 mm thicker than the end of the rod body (2) with a smaller diameter.

5. The continuous casting tundish plug rod according to claim 4, characterized in that: The height of the slag line protection ring (3) is the height of the molten steel level in the tundish.

6. The continuous casting tundish plug rod according to claim 5, characterized in that: The height of the molten steel level in the tundish is 200-400mm.

7. The continuous casting tundish plug rod according to claim 5, characterized in that: The wall thickness of the slag line protection ring (3) is 20-40 mm.

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