Fast maintenance method for furnace lining of deslagging surface of converter

Abstract

The invention provides a fast maintenance method for a furnace lining of a deslagging surface of a converter. The fast maintenance method for the furnace lining of the deslagging surface of the converter is applied to the technical field of iron and steel smelting processes, and comprises the maintenance steps of deslagging the converter, and remaining high-temperature residual furnace slags in the converter; adding bar steel scraps having temperature difference with the residual furnace slags into the converter, precipitating and condensing high-melting-point mineral substances in the furnaceslags under the action of the temperature difference of the bar steel scraps and the residual furnace slags, and adhering to the deslagging surface of the converter so as to replace a fettling material; and statically cooling the converter, and after finishing cooling, accomplishing the fast maintenance operation for the furnace lining of the deslagging surface of the converter. According to thefast maintenance method for the furnace lining of the deslagging surface of the converter provided by the invention, no cost input of the fettling material is required, the problems of the adverse effect on fettling and the environment pollution due to too long or too short sintering time are avoided, the molten steel end point components are ensured, the fettling time is effectively shortened, the converter operability is improved, and meanwhile, the fast maintenance method for the furnace lining of the deslagging surface of the converter has the characteristics of fast maintenance speed, good fettling effect, low fettling cost, safety, environment protection and the like.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting technology, and more specifically relates to a method for quickly maintaining the lining of the slag-removing surface of a converter. Background technique [0002] During the production process of converter steelmaking, due to the mechanical erosion of the furnace lining on the slag pouring surface of the converter due to the process of adding molten iron and scrap steel, the oxidation and chemical erosion of the high temperature slag and furnace gas on the furnace lining, the high temperature molten steel and slag during the temperature measurement and sampling process of the converter Affected by factors such as immersion, the lining of the slag pouring surface of the converter is damaged to a greater extent than other parts, and it becomes a weak link in the maintenance of the lining. The traditional maintenance method for the furnace lining on the slag dumping surface is to rep...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: aiming at the deficiencies of the prior art, provide a method with simple steps and low investment cost, which can ensure the safety of operation and the effect of repairing the furnace without the cost of repairing materials and no longer sintering time. Too long or too short will have adverse effects on refurbishment and environmental pollution problems, ensure the end point composition of molten steel, effectively shorten refurbishment time, improve converter operation rate, and have fast maintenance speed, good refurbishment effect, low refurbishment cost and safety Quick maintenance method for converter lining on slag dumping surface with environmental protection and other characteristics