Method for protecting converter through slag splashing by using carbon dioxide and nitrogen

Abstract

The invention provides a method for protecting a converter through slag splashing by using carbon dioxide and nitrogen. The method is suitable for the converter using the slag splashing for protecting the converter to maintain the condition of the converter, specially-made slag splashing materials are added after tapping of the converter, the adding amount is adjusted according to parameters such as the final temperature and molten steel components, the carbon dioxide is completely adopted as slag splashing gas in the early stage of slag splashing, the characteristics of carbon dioxide kinetic energy and carbon reaction heat absorption are utilized to realize rapid thickening of low-viscosity slag in the early stage and continuous change of carbon dioxide and nitrogen in the middle stage, so that the kinetic energy of gas is continuously changed, the splashing angle of slag blocks is enriched, the area in a hearth for slag splashing protection and slag scraping is enlarged, weak parts of single-gas slag splashing are reduced, the heat absorption mechanism of the reaction of carbon dioxide and carbon is utilized in the later period, rapid cooling and solidification of the slag splashing layer are achieved, carbon on the surface of the slag splashing layer is removed, the erosion resistance of the slag splashing layer is improved, maintenance of the converter condition and long-life operation are better facilitated, and good economic benefits and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and relates to a method for protecting a furnace by splashing slag with carbon dioxide and nitrogen. Background technique [0002] Slag plays an important role in the converter smelting process, and can be used as a melting medium, slag-splashing furnace raw material, etc. The viscosity of liquid slag has a direct impact on the smelting process and slag-splashing effect. In the production of converter steelmaking, there are many problems in the stability of converter smelting, which makes the maintenance of converter furnace difficult. [0003] Viscosity is one of the characteristics of slag. Slag with different viscosity directly affects the effect of slag splashing. Among them, if the viscosity of slag is too high, the dynamic conditions required for slag splashing will increase, and the impact area of ​​slag will become smaller, making it difficult for the upper slag to splash. , the l...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problems existing in the prior art, and provide a method for protecting the furnace by splashing slag with carbon dioxide and nitrogen, which solves the problem that the existing method for protecting the furnace cannot realize high-efficiency slag splashing and improve the efficiency of the converter in the current fast-paced production mode. job rate problem