A method for decomposing residual iron in a blast furnace

Abstract

The invention discloses a method for decomposing residual iron of a blast furnace. The method comprises the steps that vertical cutting is carried out, wherein the residual iron is vertically cut to aspecific depth in a tooth cutting or saw cutting mode at different positions on the top face of the residual iron; horizontal cutting is carried out, wherein at the specific depth position, the residual iron is horizontally cut to a vertical cutting face in a tooth cutting or saw cutting mode; the residual iron is removed, wherein the separated residual iron is removed out of the blast furnace; horizontal cutting and residual iron removal are repeated until the vertically cut residual iron is removed out of the blast furnace completely; and the steps are repeated until the residual iron in the blast furnace is removed out of the blast furnace completely. The invention discloses another method for decomposing the residual iron of the blast furnace. The method includes the steps that vertical cutting is carried out; the residual iron is broken by using external force; the residual iron is removed; the steps of breaking the residual iron by using external force and removing the residualiron are repeated until the vertically cut residual iron is removed out of the blast furnace completely; and the steps are repeated until the residual iron in the blast furnace is removed out of the blast furnace completely. The methods have the advantages that installation is easy, the cutting efficiency is high, and safety is achieved.

Description

technical field [0001] The invention relates to the technical field of blast furnace overhaul in the metallurgical industry, in particular to a method for decomposing residual iron in a blast furnace. Background technique [0002] The blasting method is adopted for the demolition of the residual iron of the blast furnace overhaul. Firstly, the furnace shell at the bottom of the blast furnace is removed, and a hole for blasting is drilled on the residual iron. To be transported away, this kind of operation needs to be pushed from the periphery to the center of the furnace in sequence, and the demolition can be completed after repeated times. In addition, demolition by blasting is extremely dangerous. At the same time, it is difficult to control the impact of blasting shock waves and debris flying on the blast furnace. In addition to the need for additional protective belts, the blast furnace is often repaired later, which affects the repair of the blast furnace. construction...

AI Technical Summary

Problems solved by technology

[0004] For this reason, it is necessary to provide a method for decomposing residual iron in blast furnaces, so as to solve the problems of low efficiency, heavy workload, and unpredictable operation of the crushing method in the prior art, and complicated operation, time-consuming, and broken ropes of the wire saw cutting method in the prior art.

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