A method for protecting and repairing the furnace skin after the cooling wall of the blast furnace is burned

Abstract

The invention discloses a furnace skin protecting and repairing method adopted after burning loss of a blast furnace cooling wall. The method comprises the following steps that according to the size of an area of damaged blast furnace skin, a manufactured cooling device is installed on the damaged blast furnace skin, then the damaged furnace skin is shifted and taken out or perforated, then furnace burden in the furnace is blocked and repair welding is conducted. According to the method, the cooling wall does not need to be replaced, only the cooling device which is simple in structural form is adopted, the structure of the cooling device is optimized, the cooling effect of the cooling device in a zone is improved, and heat shock in the furnace caused by falling of the cooling wall is madeup; and the repairing method can be used for repairing the furnace skin of the blast furnace on line, and the method is simple and feasible; the manufacturing cost is low, and particularly on the damaged blast furnace skin, five cooling plates are set in a group and are distributed in an X shape on the damaged furnace skin; and the X-shaped structure has the advantages that air flow and the furnace burden can be prevented from being shaken simultaneously, and the welding seam cracking phenomenon of the cooling device can be reduced.

Description

Technical field: [0001] The invention relates to blast furnace maintenance for metallurgical smelting, in particular to a method for protecting and repairing furnace skin after a blast furnace stave is burnt. Background technique [0002] During the production and operation of large-scale iron-making blast furnaces, a large amount of heat from the refractory materials of the furnace body is quickly discharged by the cooling water of the cooling system, so as to maintain the physical properties of the refractory materials of the furnace body and maintain the stable operating furnace type of the blast furnace. [0003] The cooling stave is a form of the cooling system of the blast furnace. After several years of operation of the blast furnace cooling stave, due to the decline of the cooling water capacity of the blast furnace and the accumulation of harmful elements in the blast furnace, especially the cracking of the weld seam at the root of the blast furnace stave tube, In p...

AI Technical Summary

Problems solved by technology

[0008] The task of the present invention is to provide a method for protecting and repairing the furnace skin after the blast furnace stave is burned. The repair method can overcome the difficulty in replacing the stave on-line after the stave of the blast furnace is damaged, and requires harsh conditions and potential safety hazards during replacement. , The disadvantage of large construction costs, solves the online repair problem that has been plaguing the industry for a long time

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