Improved carbonaceous mud for patching blast furnace hearth

Abstract

The invention relates to an improved carbonaceous mud that is used for repairing a blast furnace hearth, which comprises anthracite culm, graphite powder, electrode powder and coal tar. According to weight percentage, the carbonaceous mud comprises 25 percent to 28 percent of the anthracite culm, 5 percent to 8 percent of the graphite powder, 13 percent to 23 percent of the electrode powder, and the residue is the coal tar. The carbonaceous mud has indentation property, on the premise of no destruction to the liner refractory structure of the side wall of the furnace hearth, the indentation material can be pressed and sent to the furnace smoothly by using certain pressure, and the indentation rate of the carbonaceous mud at the side wall of the furnace hearth and the iron notch can reach 100 percent. The carbonaceous mud can be pressed-in smoothly whether the liner seam is small or big.

Description

Technical field: [0001] The invention relates to the field of metallurgy, in particular to a refractory material, in particular to a lining material for a blast furnace hearth side wall, and in particular to an improved carbonaceous mud used for repairing a blast furnace hearth. Background technique: [0002] In the metallurgical industry, the hearth lining of the blast furnace is the main factor determining the life of the blast furnace. In the middle and late stages of the blast furnace operation, the temperature of the side wall of the hearth is often increased due to the failure of the lining of the side wall of the hearth, or the thinning of the carbon brick lining, or the cracks in the lining of the side wall. Among them, when there is a small gap in the side wall of the hearth, the high-temperature gas flow will use the gap as a channel, which will further expand the gap and affect the stability of the overall structure; in addition, the gap also greatly reduces the t...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of improved carbonaceous mud that is used for repairing blast furnace hearth, and described this improved carbonaceous mud that is used for repairing blast furnace hearth will solve the problem of using carbonaceous mud to repair internal Technical problem of often insufficient fixed carbon deposits when lining gaps

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