A method for avoiding converter oxygen lance sticking steel slag

Abstract

A method for preventing converter oxygen lances from adhering to steel slag belongs to the technical field of a converter steel-making method and is used for preventing the converter oxygen lances from adhering to the steel slag. According to the technical scheme of the invention, two oxygen lances are used alternatively on line when steel in the same converter is smelted; one oxygen lance is used for blowing nitrogen, splashing slag and protecting the converter and the other one is used for blowing oxygen and smelting the steel; as for the oxygen lance used for blowing the nitrogen, splashing the slag and protecting the converter, the slag which the oxygen lance adheres to is automatically scraped by an on-line slag scraper after the slag splashing is finished and in the lance ascending process; and as for the oxygen lance used for blowing the oxygen and smelting the steel, an oxygen lance spray-coating device is used for automatically spray-coating anti-adhesion fire-resistant coating on the oxygen lance in the blowing and lance descending process. The method breaks through the conventional oxygen lance use method, the two on-line oxygen lances are used for blowing the nitrogen, splashing the slag and protecting the converter as well as blowing the oxygen and smelting the steel correspondingly, so that the automatic slag scraping operation of the oxygen lance used for blowing the nitrogen, splashing the slag and protecting the converter as well as the automatic anti-adhesion fire-resistant coating spraying operation of the oxygen lance used for blowing the oxygen and smelting the steel can exert the effects completely, the problem that the lance life and the safety production are influenced by the fact that the oxygen lances adhere to the steel slag layer in a wrapping and mixing way is solved completely, the life of the oxygen lances is prolonged and the production efficiency of the converter is improved.

Description

technical field [0001] The invention relates to a method for preventing a converter oxygen lance from sticking to steel slag, and belongs to the technical field of converter steelmaking methods. Background technique [0002] At present, there are two oxygen lances suspended in the converter oxygen lance lift and traverse mechanism in our country, one for use and one for standby. In the smelting process, in order to increase the furnace life and achieve a good effect of slag splashing to protect the furnace, the slag often needs to be made with a certain viscosity. Therefore, in the process of slag splashing, the outer steel pipe of the oxygen lance will inevitably stick If no measures are taken to remove the sticky slag in time, this oxygen lance with sticky slag will wrap a layer of sticky steel on the sticky slag layer during steelmaking. Increase, the steel slag on this oxygen lance is like a "snowball", it will become thicker and thicker, and the stickier will be strong...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for avoiding the steel slag sticking to the converter oxygen lance, which can avoid the steel slag sticking to the converter oxygen lance, thereby fundamentally solving the problem that it is difficult to effectively remove the steel slag sticking to the oxygen lance

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