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Bottom blowing ventilation submersed nozzle

A breathable and nozzle technology, which is applied in the direction of casting melt containers, metal processing equipment, casting equipment, etc., can solve the problems of threatening the quality of slabs, blockage, etc., and achieve the effect of reducing the entry into slabs, avoiding deposition, and ensuring purity

Inactive Publication Date: 2019-04-05
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a bottom-blowing and ventilating submerged nozzle, which solves the problem in the prior art that during the continuous casting production of submerged nozzles, accumulations such as clustered alumina at the bottom of the side hole are deposited and blocked, threatening the quality of the cast slab

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] A bottom-blown ventilating nozzle, such as Figure 1-4 As shown, it includes the nozzle body 5 and the nozzle lining 6 compounded on the inner wall of the nozzle body 5. The lower part of the nozzle body 5 is provided with a side hole, and the bottom of the side hole is provided with a cylindrical air-permeable part 1. 2 is connected to the gas chamber 3, and the gas chamber 3 communicates with the argon gas pipeline 4 through an external connection, the ext...

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Abstract

The invention provides a bottom blowing ventilation submersed nozzle. The bottom blowing ventilation submersed nozzle comprises a nozzle body and a nozzle lining composited on the inner wall of the nozzle body; a side hole is formed in the lower portion of the nozzle body, a cylindrical ventilation part is arranged on the bottom of the side hole, and is connected to an air chamber through an air way, the air chamber is communicated with an argon pipeline through an outer connection port, the outer connection port is horizontally arranged, the air way is located between the nozzle body and thenozzle lining, when the nozzle is used, argon with a certain pressure and flow is input into the nozzle air chamber through an argon blowing pipeline and is conveyed to the nozzle bottom ventilation part through the air way, an argon bubble curtain is formed on the bottom of the side hole, the argon bubbles can carry inclusions like aluminium oxide to rise to the position above the liquid face inmolten steel, deposition of the inclusions in the molten steel on the bottom of the side hole can be avoided, aluminium oxide inclusions are prevented from entering a casting blank, the casting blankinclusions can be reduced, and the casting blank quality is improved.

Description

technical field [0001] The invention relates to the field of functional refractory materials for continuous casting, in particular to a bottom-blown breathable submerged nozzle. Background technique [0002] The submerged nozzle is a key functional refractory material for continuous casting. The last important functional refractory material in the steelmaking process is the flow steel channel between the tundish and the mold. It has the ability to transport molten steel and support the molten steel in the mold. The function of optimizing the distribution in the middle. With the structural upgrading and development of the iron and steel industry, continuous casting metallurgy has developed a variety of special steel types with different characteristics. When metal steel is used, a large amount of deposits will be generated in the inner cavity of the nozzle and its bottom, among which clustered alumina deposits are the most common. The deposited clustered alumina accumulates...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/58
CPCB22D41/58
Inventor 王次明王新杰刘丽任林颜浩赵伟高梅刘美荣
Owner 北京利尔高温材料股份有限公司
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