Pit patching material for converter

Abstract

The invention relates to a pit patching material for a converter, wherein the pit patching material comprises the following raw materials by weight: 60-85 parts of the mixed powder of dolomite and sintered magnesia, 10-20 parts of modified asphalt, 2-5 parts of an additive, and 6-10 parts of a wetting agent, and a ratio of the dolomite to the sintered magnesia in the mixed powder is 1:(1-2). According to the present invention, the pit patching material has advantages of good self-flowing property, hot strength, corrosion resistance, thermal shock resistance and short hardening time so as to reduce the blowing-out maintenance time of the converter and improve the working efficiency; and the pit patching material and the converter working line are well adhered so as to prevent the pit patching material from peeling off during the use.

Description

Technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a repair charge for a converter. Background technique [0002] With the substantial improvement of converter smelting intensity and production rhythm, the quality requirements for the repairing materials for converter maintenance are becoming more and more stringent. At present, the repairing materials used for furnace lining maintenance mainly use magnesia as the main material and asphalt as the binder. When repairing the furnace, add the repairing material into the hopper and put it into the furnace. The repairing material often experiences abnormal damages such as collapse, overturning, failure to make up or rapid erosion, and sometimes cause safety accidents such as splashing, which seriously affects the normal operation of the converter. produce. Therefore, there is an urgent need for a new type of converter material to improve the maintenance status of the conver...

AI Technical Summary

Problems solved by technology

[0002] With the substantial increase in the smelting intensity and production pace of the converter, the quality requirements for repairing materials for converter maintenance are becoming more and more stringent. At present, the repairing materials used for furnace lining maintenance are mainly magnesia as the main material and asphalt as the binder. When repairing the furnace, put the repairing material into the funnel and put it into the furnace for use. The repairing material often has abnormal damage such as material collapse, overturning, failure to repair, or rapid erosion, and sometimes causes safety accidents such as splashing, which seriously affects the normal operation of the converter. Production

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