Continuous casting submersed nozzle

An immersion, nozzle technology, used in foundry equipment, casting melt containers, manufacturing tools, etc., can solve the problems of no air inhalation, lower molten steel temperature, no inclusion modification, etc., to achieve improved quality, avoid two The effect of secondary oxidation

Inactive Publication Date: 2020-08-25
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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  • Continuous casting submersed nozzle

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Effect test

Embodiment 1

[0023] The continuous casting submerged nozzle includes 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; On the main body 100 and communicated with the nozzle inner cavity 110, the angle between the center line of the side arm pipe 200 and the horizontal line is 5°, 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 inner cavity 110 One-half of the side arm pipeline 200 is provided with a gas pipeline 300 communicating with the side arm pipeline 200, and the inlet of the gas pipeline 300 is provided with a high temperature resistant metal gas valve.

[0024] During the continuous casting production process, the continuous casting submerged nozzle is connected to the continuous casting tundish, the gas valve of the gas pipeline is connected with the argon pipeline...

Embodiment 2

[0026] The continuous casting submerged nozzle includes 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; On the main body 100 and communicated 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 60°, the length of the side arm pipe 200 is 50 mm, and the diameter of the side arm pipe 200 is equal to that of the inner cavity 110 of the nozzle. Inner diameter: A gas pipeline 300 communicating with the side arm pipeline 200 is provided above the side arm pipeline 200 , and a high temperature resistant metal gas valve is provided at the inlet of the gas pipeline 300 .

[0027] During the continuous casting production process, connect the continuous casting submerged nozzle to the continuous casting tundish, connect the gas valve of the gas pipeline with the nitrogen pipeli...

Embodiment 3

[0029] The continuous casting submerged nozzle includes 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; On the main body 100 and communicated 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 30°, 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 inner cavity 110 Two-thirds of the side arm pipeline 200 is provided with a gas pipeline 300 communicating with the side arm pipeline 200, and the inlet of the gas pipeline 300 is provided with a high temperature resistant metal gas valve.

[0030] During the continuous casting production process, the continuous casting submerged nozzle is connected to the continuous casting tundish, the gas valve of the gas pipeline is connected with the arg...

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Abstract

The invention discloses a continuous casting submersed nozzle. The continuous casting submersed nozzle comprises a nozzle main body, and a side arm pipeline, wherein a nozzle inner cavity is arrangedin the nozzle main body; the side arm pipeline is arranged on the nozzle main body upwards obliquely and communicates with the nozzle inner cavity, and wires 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 above the side arm pipeline. According to the continuous casting submersed nozzle, the structure ofthe submerged nozzle is improved, the side arm pipeline is additionally arranged on the closed structure of the submerged nozzle, and the side arm pipeline communicates with the nozzle inner cavity of the submerged nozzle, so that calcium-containing wires or steel wires can be fed into molten steel flowing from a continuous casting tundish to a crystallizer through the side arm pipeline in continuous casting production, therefore, the metallurgical effect of modifying inclusions or reducing the temperature of the molten steel is realized, and the quality of a finished product is effectively improved. Inert protective gas can be introduced into the side arm pipeline through the gas pipeline communicating with the side arm pipeline, so that air is prevented from entering the molten steel and causing secondary oxidation of the molten steel.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy continuous casting production, in particular to a continuous casting submerged nozzle. 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 shape ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/58B22D1/00B22D11/11C21C7/00
CPCB22D1/00B22D11/11B22D41/58C21C7/0006
Inventor 陈亮陈天明李红光郭奠荣
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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