Method for removing blast furnace bottom coagulated remainder iron

Abstract

The invention relates to a removing method for the remained coagulating bottom iron of a large blast furnace. The removing method for the remained coagulating bottom iron of the large blast furnace consists the following steps 1) a furnace shell is cut into partitions by an oxygen lance, and the furnace shell is dismantled from outside, hoisted and delivered in partitions; 2) a channel is paved for a rock drill to enter the furnace and the rock drill is driven into the inside of the blast furnace bottom; a relatively thinner part of the residual edge is selected, and the carbon bricks and residual adhering slag generated during the production process on the side and the bottom surface of the selected remainder iron part are chiseled away by the rock drill; 3) a electric hydraulic Jack is arranged at a hollow part chiseled by the rock drill, and the bottom part of the electric hydraulic Jack is contacted with the base of the furnace, and the top part of the electric hydraulic Jack is contacted with the remainder iron; the electric hydraulic Jack is started until a crack phenomena and a fracture phenomena is showed in the remainder iron; 4) according to the naturally fractured partitions, the fractured remainder iron is hoisted by a crane and loaded out from the furnace. The method not only is safe economical, but also can shorten the construction period and simplify the construction at the same time.

Description

technical field [0001] The invention belongs to a method for removing residual iron at the bottom of a blast furnace during overhaul of a blast furnace in the metallurgical industry. Specifically related to a suitable for 1000m 3 The removal method of the above-mentioned large-scale blast furnace bottom condensed iron residue. Background technique [0002] The removal of condensed iron residue at the bottom of the blast furnace is an important part of the overhaul of the blast furnace, which directly affects the production efficiency of the enterprise. When the blast furnace is shut down, the residual molten iron is discharged. The residual molten iron is not completely discharged, and the remaining part condenses on the bottom of the blast furnace to form an iron nest in the shape of a whole pot bottom. The bottom of the blast furnace is a carbon brick + high-alumina brick integrated bottom structure type. Large carbon bricks are built around the periphery, and high-alumi...

AI Technical Summary

Problems solved by technology

[0004] 1. The blasting demolition plan needs to apply for professional blasting, and the approval time is relatively long

[0005] 2. Blasting requires a professional blasting company to carry out construction, and the cost is relatively high, which increases construction costs

[0006] 3. Safety fences should be set up around the blasting site, which will increase the construction cost

[0007] 4. Blasting requires physical analysis, and then drilling and charging operations are relatively complicated

[0008] 5. When blasting, all construction personnel must evacuate the site, which will affect the overall construction

[0009] 6. Various fragments of blasting may fly out of the predetermined range, and the safety factor is low. At the same time, it is relatively troublesome to clean up the residue generated by blasting, which cannot guarantee the conditions for civilized construction

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