A continuous casting anti-clogging submerged nozzle

An immersion-type, anti-clogging technology, applied in casting equipment, casting melt containers, metal processing equipment, etc., can solve the problems of side hole nodulation, nozzle nodulation, blockage, etc., to prevent nodulation and blockage, improve casting Billet quality, ease of manufacture

Active Publication Date: 2020-02-11
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem of nodulation and blockage of the side hole of the submerged nozzle during the continuous casting of molten steel of slab, bloom and round billet, and to avoid the non-metallic inclusions in the molten steel from adhering to the side hole of the submerged nozzle Nodules and blockages on the side walls

Method used

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  • A continuous casting anti-clogging submerged nozzle
  • A continuous casting anti-clogging submerged nozzle
  • A continuous casting anti-clogging submerged nozzle

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as Figure 4 , Figure 5 , Figure 6 As shown, the two side holes 3 of the anti-clogging submerged nozzle of the present invention are rectangular. The submerged nozzle is composed of a body 1, a main hole 2 and two rectangular holes 3 at the lower part of the side wall of the body, and the two side walls of the rectangular hole expand outwards with a straight side 6 with an angle α=20°, as shown in Figure 6 shown.

[0042] The bottom 4 of the side hole expands downward in an arc shape with a radius of R=50mm, and forms the lower side hole of the submerged nozzle with the top 7 of the side hole at a downward angle b=15°, such as Figure 4 shown.

Embodiment 2

[0044] Such as Figure 4 , Figure 5 , Figure 7 As shown, the two side holes 3 of the anti-clogging submerged nozzle of the present invention are rectangular. The submerged nozzle is composed of a main body 1, a main hole 2 and two rectangular side holes 3 at the bottom of the side wall of the body. Figure 7 ) expands outward, and the bottom of the side hole 4 ( Figure 4 ) expands downward in an arc with a radius of R=60mm, and is connected with the top 7 of the side hole at a downward angle b=14° ( Figure 4 ) constitute the lower side hole of the submerged nozzle.

Embodiment 3

[0046] Such as Figure 4 , Figure 8 , Figure 6 As shown, the two side holes 3 at the lower part of the anti-clogging submerged nozzle of the present invention are oval. The submerged nozzle is composed of a body 1, a main hole 2 and two oval holes 3 at the lower part of the side wall of the body. Figure 6 ) expands outward, and the bottom of the side hole 4 ( Figure 4 ) expands downward in an arc with a radius of R=40mm, and is connected with the top 7 of the side hole at a downward angle b=15° ( Figure 4 ) constitute the lower side hole of the submerged nozzle.

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Abstract

The invention belongs to the field of high-temperature molten steel continuous casting and relates to a continuous casting block-preventing immersion type water opening which comprises a body, a mainhole and side holes. The main hole is located in the body. The side holes are located in the two sides of the body and communicate with the main hole. The number of the side holes is not less than onepair. The side holes are designed in the manner that the two side walls expanding outwards with the angle a or the arc shape with the r as the radius. The bottoms of the side holes expand downwards with R as the radius, and the bottoms of the side holes and the tops of the side holes with the downward angle b form lower side holes of the immersion type water opening. According to the novel blocking-preventing immersion type water opening, in the process of flowing the side holes of the immersion type water opening of molten steel, nonmetallic inclusion particles in the molten steel directly flow out of the side holes of the immersion type water opening, the situation that the nonmetallic inclusion particles in the molten steel collide and make contact with the side walls of the side holesof the immersion type water opening is avoided, thus, impurities are prevented from adhering to the side walls of the side holes, the scaffolding and blocking phenomena of the side holes of the immersion type water opening are effectively prevented, and smooth production of continuous casting is ensured.

Description

technical field [0001] The invention belongs to the field of high-temperature molten steel continuous casting, and relates to an anti-clogging submerged nozzle for continuous casting. Background technique [0002] In the continuous casting of molten steel at high temperature, especially when continuously casting low-carbon aluminum-killed steel, steel with high aluminum content, rare earth-containing steel and titanium-containing steel, there are more non-metallic inclusions in the molten steel , when the molten steel containing tiny non-metallic inclusions enters the crystallizer from the continuous casting tundish through the submerged nozzle, the inclusions in the molten steel adhere to the side wall of the straight-walled side hole at the lower part of the submerged nozzle , with the progress of molten steel casting, the number of inclusions adhering to the side wall of the lower side hole of the submerged nozzle gradually increases, forming nodules, resulting in a decre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/50
CPCB22D41/50
Inventor 钟良才季伟烨贾丹林孙建月杜文斌
Owner NORTHEASTERN UNIV LIAONING
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