Construction method of self-flowing refractory castable for blast furnace

Abstract

The invention relates to a construction method for the automatically-flowing refractory castable of a blast furnace. The construction method comprises the working procedures of determining the particle size of a castable aggregate, moulding, stirring the castable, casting, and carrying out aftertreatment after the casting, wherein once one section of cooling wall is installed, the section is moulded and cast; four automatically-flowing casting construction positions are circumferentially and uniformly arranged at the inner sides of the sixth section to the ninth section during large-area open casting; construction is sequentially carried out at the four construction positions according to one direction, so that a castable layer is prevented from missing and hollow joints; in particular, the casting is carried out by a moulding mode of combining a tuyere support with a suspended hanging scaffold with regard to the characteristics that a gap between the sixth section of copper cooling wall of a furnace bosh and a furnace shell is large, and the lower part of the copper cooling wall is open. The construction method disclosed by the invention can be used for replacing the traditional waterless slurry press-in process, and solving the long-term plagued problems of coal gas blow-by between a furnace scale and the cooling wall due to uncompacted slurry press-in, the temperature rising and redness of the furnace scale, the breakage of the cooling wall, and the cracking of the furnace scale.

Description

technical field [0001] The invention relates to the technical field of blast furnace engineering construction, in particular to a construction method of self-flowing refractory castables for blast furnaces, in which slurry is filled between cooling walls and furnace shells in blast furnaces, and is suitable for large-scale new blast furnaces. Background technique [0002] The distance between the furnace shell and the cooling wall of the traditional mainstream blast furnace is only about 30mm, and cementless slurry is pressed into the gap; while the 1080 blast furnace designed by the Shandong Provincial Metallurgical Design Institute has a cooling wall between the cooling wall and the cooling wall at the bosh, furnace waist, and furnace shaft. The maximum distance between the shells is about 600mm. The anhydrous press-in mud in the original design tends to shrink in volume after being consolidated at high temperature, the filling is not dense, and gaps appear, which will lead...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a construction method of self-flowing refractory castables for blast furnaces, which overcomes the shortcomings and deficiencies of the prior art from the selection of suitable fillers to pouring construction, and solves the problem of gas collusion between the furnace shell and the cooling wall. , The problem that the furnace skin is easy to crack