Method for controlling continuous casting tundish submersed nozzle

A continuous casting tundish and submerged technology, which is applied in the field of controlling the submerged nozzle of the continuous casting tundish, can solve the problems of high manufacturing cost, the inability to meet the cost reduction and efficiency increase of iron and steel smelting, and the limited range of liquid level adjustment, so as to improve the molten steel Yield effect

Inactive Publication Date: 2014-10-08
PANGANG GRP PANZHIHUA STEEL & VANADIUM
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Problems solved by technology

However, due to the high manufacturing cost of the zirconium-containing alloy slag line of the submerged nozzle, and the service life of the slag line is 5 to 8 furnaces, it cannot meet the production purpose of reducing costs and increasing efficiency in iron and steel smelting
[0003] The patent application with the publication number CN101229576A discloses a method for controlling the slag line of the continuous casting mold. The method adjusts the slag layer in the mold through the automatic control system of the liquid level of the continuous casting mold to change the slag line of the submerged nozzle. The erosion shape of the line, but the liquid level adjustment range is limited, which leads to limitations in the adjustment of the slag line

Method used

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Embodiment Construction

[0010] The present invention aims at the problems of short service life of the submerged nozzle of the tundish and few continuous casting furnaces in the prior art, and provides a control system that can increase the service life of the submerged nozzle and increase the yield of molten steel Method for continuous casting tundish submerged nozzle. According to the method of the invention, the number of single tundish continuous casting furnaces in the continuous casting process can be increased to 12 to 18 furnaces.

[0011] After the tundish is poured in the continuous casting process, according to the casting time, the existing technology generally uses manual methods to select 2 or 3 slag line positions, and controls the liquid steel level in the mold through the selected slag line positions , adjust the slag layer of molten steel to the slag line position of the selected submerged nozzle, so as to realize the dispersed erosion of molten steel and slag on the submerged nozzl...

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Abstract

The invention discloses a method for controlling a continuous casting tundish submersed nozzle. The method is characterized in that when a tundish pours molten steel to a crystallizer through the submersed nozzle, the tundish submersed nozzle is intermittently inserted into the molten steel of the crystallizer with a preset distance, and therefore the inserting depth of the submersed nozzle in the molten steel in the crystallizer can be intermittently increased. According to the method for controlling the continuous casting tundish submersed nozzle, the service life of the tundish submersed nozzle can be obviously prolonged.

Description

technical field [0001] The invention belongs to the technical field of continuous casting, in particular, the invention relates to a method for controlling a submerged nozzle of a continuous casting tundish. Background technique [0002] The submerged nozzle of the tundish is an important part in the continuous casting production process. It needs to be resistant to erosion and erosion of molten steel and slag, but any material will be eroded and eroded by molten steel and slag to varying degrees. The slag line of the submerged nozzle in the prior art (the part of the submerged nozzle that is eroded and washed by slag) is often made of zirconium-containing alloy, so that the erosion and erosion resistance of the slag line of the submerged nozzle can be improved. However, since the zirconium-containing alloy slag line of the submerged nozzle has high manufacturing cost, and the service life of the slag line is 5 to 8 furnaces, it cannot meet the production purpose of reducing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D11/10
Inventor 陈雄朱义才杨文中黎建全黄平胡林石鹏解明科
Owner PANGANG GRP PANZHIHUA STEEL & VANADIUM
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