Long nozzle with novel structure

Abstract

The utility model discloses a novel structure long nozzle which comprises a long nozzle body, a bottom plate is formed at the outlet end of the long nozzle body, and a side hole communicated with fluid of the long nozzle body is formed in the side wall of a slag line part of the long nozzle body. The side holes incline towards the flowing direction of molten steel in the nozzle body in the horizontal plane direction or incline towards the flowing direction of the molten steel in the nozzle body in the horizontal plane direction, and on the longitudinal section of the axis of the long nozzle body, the included angle between the side holes and the horizontal plane is + / -60 degrees. By arranging the side holes, the flow direction of molten steel can be changed, the molten steel can be guided, the molten steel cannot directly impact the bottom of the tundish, impact of the molten steel on the bottom of the tundish is reduced, the scouring degree of the tundish impact plate and the bottom of the flow stabilizer is greatly reduced, the overall service life of the tundish is prolonged, the accident rate is reduced, and the cost per ton of steel is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of refractory materials for steel industry, in particular to a long nozzle with novel structure. BACKGROUND

[0002] Steel production is carried out under high temperature conditions, and it is necessary to use refractory materials to achieve it. The three major components, namely long nozzle, submerged nozzle and stopper, are important functional refractory materials for steel smelting, which play the role of molten metal transmission channel. Among them, the long nozzle is used between the ladle and the tundish to guide the molten steel from the ladle to the tundish, so that the molten steel flows as required, and also plays the role of preventing temperature drop, preventing hydrogen and nitrogen absorption and avoiding secondary oxidation. The tubular part of the long nozzle collects and flows the steel flow to the tundish, but the tundish is continuously impacted by the molten steel, and the bottom part of the tundish is continuously thickened, which still cannot meet the demand of long-life tundish. SUMMARY

[0003] Therefore, the technical problem to be solved by the utility model is to provide a long nozzle with novel structure, which changes the flow direction of molten steel, reduces the impact of molten steel on the bottom of the tundish, prolongs the overall service life of the tundish and reduces the cost per ton of steel.

[0004] To solve the above technical problem, the utility model provides the following technical scheme: a long nozzle with novel structure, comprising a long nozzle body, a bottom plate is formed on the outlet end of the long nozzle body, and a side hole in fluid communication with the long nozzle body is formed on the side wall of the slag line part of the long nozzle body.

[0005] The side hole of the above-mentioned long nozzle with novel structure is inclined along the horizontal direction towards the direction of the molten steel flow in the nozzle body.

[0006] The above-mentioned long nozzle with novel structure, in the longitudinal section along the axis of the long nozzle body: the included angle A between the side hole and the horizontal plane is 0-60 degrees.

[0007] The side hole of the above-mentioned long nozzle with novel structure is inclined along the horizontal direction towards the direction of the molten steel flow in the nozzle body.

[0008] The above-mentioned long nozzle with novel structure, in the longitudinal section along the axis of the long nozzle body: the included angle B between the side hole and the horizontal plane is 0-60 degrees.

[0009] The number of the side holes of the above-mentioned long nozzle with novel structure is 2-4.

[0010] The aperture of the side hole of the above-mentioned long nozzle with novel structure is 20-300 mm.

[0011] The bottom plate is provided with a bottom hole in fluid communication with the long nozzle body.

[0012] The bottom hole has a diameter of 15-300 mm.

[0013] The bottom hole has a diameter of 15-300 mm.

[0014] The technical scheme of the utility model has the following beneficial technical effects:

[0015] By setting the side hole, the flow direction of the molten steel can be changed, the molten steel is guided, the molten steel does not directly impact the ladle bottom, the impact of the molten steel on the intermediate ladle bottom is reduced, the degree of scouring of the intermediate ladle impact plate and the flow stabilizer bottom is greatly reduced, the overall service life of the intermediate ladle is prolonged, the accident rate is reduced, and the ton steel cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model discloses a long shuikou's cross section structure schematic diagram;

[0017] Figure 2 The utility model discloses a long shuikou's cross section structure schematic diagram;

[0018] Figure 3 The utility model discloses a long shuikou's cross section structure schematic diagram;

[0019] The figure mark shows as follows: 1-long shuikou body;2-slag line part;3-bottom plate;4-side hole;5-steel shell;6-bottom hole. DETAILED DESCRIPTION

[0020] Embodiment 1

[0021] The utility model discloses a long shuikou's cross section structure schematic diagram;

[0022] The side hole 4 is inclined to the direction of the molten steel flowing into the shuikou body 1 along the horizontal plane direction or is inclined to the direction of the molten steel flowing into the shuikou body 1.

[0023] In the longitudinal section along the axis of the long nozzle body 1: the angle A between the side hole 4 and the horizontal plane is 0-60 degrees, or the angle B between the side hole 4 and the horizontal plane is 0-60 degrees, that is, the side hole 4 is inclined upward or downward, and the angle range of the inclination is -60° to +60°. By setting the side hole 4, the flow direction of the molten steel can be changed, and the molten steel can be guided, so that the molten steel does not directly impact the ladle bottom, reduces the impact of the molten steel on the bottom of the tundish, greatly reduces the degree of erosion of the tundish impact plate and the bottom of the flow stabilizer, prolongs the overall service life of the tundish, reduces the accident rate, and reduces the cost per ton of steel.

[0024] Embodiment 2

[0025] A new structure long nozzle in this embodiment is different from embodiment 1 in that a bottom hole 6 is arranged on the bottom plate 3 and is in fluid communication with the long nozzle body 1, the number of the bottom hole 6 is 1-3, and the diameter of the bottom hole 6 is 15-300 mm. The bottom hole 6 can play a role in flow splitting, and the flow rate of the molten steel can be improved. The actual diameter and the number of the bottom hole 6 are set according to the required flow rate.

[0026] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the patent application claims.

Claims

1. A novel long nozzle structure, comprising a long nozzle body (1), characterized in that, The outlet end of the long water inlet body (1) is formed with a bottom plate (3), and the slag line part (2) of the long water inlet body (1) is provided with a side hole (4) that is in fluid communication with the long water inlet body (1). The side hole (4) is inclined in the direction of the flow of molten steel in the long nozzle body (1) along the horizontal plane. On the longitudinal section along the axis of the long nozzle body (1), the angle A between the side hole (4) and the horizontal plane is 0-60 degrees. Alternatively, the side hole (4) is inclined in the direction of the flow of molten steel in the long nozzle body (1) along the horizontal plane. On the longitudinal section along the axis of the long nozzle body (1), the angle B between the side hole (4) and the horizontal plane is 0-60 degrees. The bottom plate (3) is provided with a bottom hole (6) that is in fluid communication with the long water inlet body (1).

2. The novel long nozzle structure according to claim 1, characterized in that, The number of side holes (4) is 2-4.

3. The novel long nozzle structure according to claim 1, characterized in that, The diameter of the side hole (4) is 20-300 mm.

4. The novel long nozzle structure according to claim 1, characterized in that, The diameter of the bottom hole (6) is 15-300 mm.

5. The novel long nozzle structure according to claim 1, characterized in that, The number of bottom holes (6) is 1-3.

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