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
CN109570484AInactive Publication Date: 2019-04-05北京利尔高温材料股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京利尔高温材料股份有限公司
Publication Date
2019-04-05
Estimated Expiration
Not applicable · inactive patent

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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.
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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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