Replacing method of blast furnace shell and water wall

Abstract

The invention discloses a rapid and efficient replacing method of a blast furnace shell and a water wall, which comprises the following steps: 1) installing support frames around the furnace body to prevent the furnace shell from sinking or slanting; 2) cutting the furnace shell which needs to be replaced, integratively removing the cut-out furnace shell and the water wall connected with the furnace shell; 3) installing a new furnace shell on the furnace body; and 4) after replacing the furnace shell, opening an inlet hole on the furnace shell, introducing the new water wall into the furnace body through the inlet hole and installing the new water wall on the inner wall of the furnace shell. The method directly and integratively removes the furnace shell and the water wall connected together and introduces the new water wall rapidly and conveniently into the furnace body, thus greatly shortening the repair and construction time, saving the use of mechanical devices and labor cost, and realizing rapid and efficient replacement of the blast furnace shell and water wall. The construction method of the invention in particular applies to small-sized blast furnaces with the volume of no more than 1000 cubic meters.

Description

technical field [0001] The invention relates to the field of blast furnace maintenance, in particular to a method for replacing a blast furnace shell and a water wall. Background technique [0002] The temperature of molten steel in blast furnace ironmaking is above 1000°C. In order to prevent overheating and deformation of the furnace shell, a water-cooled wall is installed on the inner wall of the furnace shell as a partition layer between the furnace and the furnace shell to reduce the temperature of the furnace shell. The service life of the water-cooled wall varies according to the quality of the water-cooled wall, the use temperature and the quality of the cooling water. Once the cooling effect of the water-cooled wall is not good, it will cause the water-cooled wall to be burned, the furnace shell will be deformed, and the production will be affected. Therefore, after the blast furnace has been used for a period of time, it must be shut down for major and medium rep...

AI Technical Summary

Problems solved by technology

However, if the furnace shell is partially deformed, it is also necessary to replace the furnace shell

The traditional replacement method adopts the method of dismantling the water-cooled wall first and then removing the furnace shell. The water-cooled wall and the furnace shell are removed and replaced separately. The maintenance and construction time is long, which affects the utilization efficiency of the blast furnace.

There is currently no quick replacement method for blast furnace shells and water walls

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