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Submersed nozzle for continuous casting

An immersion and nozzle technology, applied in casting equipment, casting melt containers, metal processing equipment, etc., can solve the problems of lowering the temperature of molten steel, not inhaling air, and not oxidizing, so as to avoid secondary oxidation and improve quality Effect

Inactive Publication Date: 2020-08-07
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical solutions disclosed in the above-mentioned patents successively solve the problems of partial flow of molten steel in the crystallizer due to blockage of the inner wall of the submerged nozzle, nodules and blockage of the side hole of the submerged nozzle, no air inhalation during steel pouring, and non-oxidation of the submerged nozzle plate surface. problem, but it does not have the effect of denaturing inclusions and reducing the temperature of molten steel

Method used

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  • Submersed nozzle for continuous casting

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Effect test

Embodiment 1

[0023] A submerged nozzle for continuous casting, including a nozzle body 100, a side arm pipe 200 and a gas pipe 300. The nozzle body 100 is a hollow straight cylinder structure, and the inside of the nozzle body 100 is a nozzle inner cavity 110; the side arm pipe 200 is inclined upward It is arranged on the main body of the nozzle 100 and communicates with the inner cavity 110 of the nozzle. The angle between the center line of the side arm pipe 200 and the horizontal line is 61°, the length of the side arm pipe 200 is 5mm, and the diameter of the side arm pipe 200 is equal to the inner diameter of the nozzle. The inner diameter of the cavity 110; the gas pipeline 300 communicating with the side arm pipeline 200 is provided under the side arm pipeline 200, and a high temperature resistant metal gas valve is provided at the inlet of the gas pipeline 300.

[0024] During the continuous casting production process, the submerged nozzle used for continuous casting is connected to ...

Embodiment 2

[0026] A submerged nozzle for continuous casting, including a nozzle body 100, a side arm pipe 200 and a gas pipe 300, the nozzle body 100 is a hollow straight cylinder structure, the interior of the nozzle body 100 is a nozzle inner cavity 110; the side arm pipe 200 is inclined upward It is arranged on the main body of the nozzle 100 and communicates with the inner cavity 110 of the nozzle. The angle between the center line of the side arm pipe 200 and the horizontal line is 90°, the length of the side arm pipe 200 is 50mm, and the diameter of the side arm pipe 200 is equal to One-half of the inner diameter of the cavity 110; a gas pipeline 300 communicating with the side arm pipeline 200 is provided below the side arm pipeline 200, and a high temperature resistant metal gas valve is provided at the entrance of the gas pipeline 300.

[0027] During the continuous casting production process, the submerged nozzle used for continuous casting is connected to the continuous casting...

Embodiment 3

[0029] A submerged nozzle for continuous casting, including a nozzle body 100, a side arm pipe 200 and a gas pipe 300, the nozzle body 100 is a hollow straight cylinder structure, the interior of the nozzle body 100 is a nozzle inner cavity 110; the side arm pipe 200 is inclined upward Set on the main body of the nozzle 100 and communicate with the inner cavity 110 of the nozzle, the angle between the center line of the side arm pipe 200 and the horizontal line is 75°, the length of the side arm pipe 200 is 30mm, and the diameter of the side arm pipe 200 is equal to the inner diameter of the nozzle. Two-thirds of the inner diameter of the cavity 110; a gas pipeline 300 communicating with the side arm pipeline 200 is provided below the side arm pipeline 200, and a high temperature resistant metal gas valve is provided at the entrance of the gas pipeline 300.

[0030] During the continuous casting production process, the submerged nozzle used for continuous casting is connected t...

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Abstract

The invention discloses a submersed nozzle for continuous casting. The submersed nozzle comprises a nozzle body, a nozzle inner cavity is formed in the nozzle body, the submersed nozzle further comprises a side arm pipeline, the side arm pipeline is upwards obliquely arranged on the nozzle body and communicates with the nozzle inner cavity, and a thread can be fed into the nozzle inner cavity through the side arm pipeline; and a gas pipeline communicating with the side arm pipeline is arranged below the side arm pipeline. By structurally improving the submersed nozzle, the side arm pipeline isadditionally arranged on a closed structure of the submersed nozzle, the side arm pipeline communicates with the nozzle inner cavity of the submersed nozzle, thus in continuous casting production, acalcium-containing thread or a steel thread can be fed into molten liquid flowing into a crystallizer from a continuous casting tundish through the side arm pipeline, thus the metallurgical effect ofinclusion modification or molten liquid temperature lowering is achieved, and the quality of a finished product can be effectively improved; and inert protection gas can be blown into the side arm pipeline through the gas pipeline communicating with the side arm pipeline, air is prevented from entering the molten steel, and secondary oxidation of the molten steel is avoided.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgical continuous casting production, in particular to a submerged nozzle for continuous casting. Background technique [0002] With the development of iron and steel metallurgy technology, users have higher and higher requirements for the quality of iron and steel products, which poses great challenges to inclusions in molten steel and steel segregation. At present, the methods for improving inclusions mostly use calcium treatment, rare earth treatment and other methods to modify inclusions after refining. Although these methods can achieve better treatment effects, the yield is generally low, less than 20% %; In addition, calcium wire and steel wire can also be put into molten steel to achieve the purpose of modifying inclusions and reducing the temperature of molten steel. [0003] At present, the submerged nozzle used in continuous casting production at home and abroad is in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/58
CPCB22D41/58
Inventor 陈亮陈天明李红光黎健全
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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