A kind of medium frequency furnace lining repair method

Abstract

The invention discloses an intermediate frequency furnace lining repairing method. The method includes first cleaning a furnace lining, gradually adding a silica sand material and adding melted iron to conduct molding casting, cooling and other steps after the silica sand material quantity is determined. The method is simple and high in speed. The method adopts the location repairing mode, furnace rebuilding is not required, a small furnace lining blank mould is used, use of repairing materials can be reduced, and the cost and raw material use can be reduced. Furnace building time is shortened, only 9-10 hours is required from furnace opening press ring bolt installation to melted iron discharging, normal production order of a company is maintained, and another intermediate frequency furnace can work due to the fact that local repairing is conducted or only the furnace mouth area is repaired.

Description

technical field [0001] The invention relates to the field of intermediate frequency furnaces, in particular to a method for repairing the lining of intermediate frequency furnaces. Background technique [0002] The lining of the intermediate frequency furnace or the slag at the furnace mouth must be cleaned before it can be used. The cleaning process will cause partial cracking of the furnace lining, which will cause leakage accidents. After the partial cracking of the furnace lining, the furnace lining must be rebuilt, resulting in a waste of furnace building materials. In addition, when the yoke or coil of the furnace body fails, the upper part of the furnace mouth area must be removed for inspection and maintenance, and the furnace mouth must be rebuilt before it can be used. Relining requires a lot of manpower, material and financial resources. [0003] 1. The cost of furnace building materials is high: the furnace lining mold and materials are about 16,000 yuan for re-...

AI Technical Summary

Problems solved by technology

[0003] 1. The cost of furnace building materials is high: the furnace lining mold and materials are about 16,000 yuan for re-building the furnace; (see figure 1 )

[0004] 2. There is a large waste of electricity in furnace lining drying: the waste of electricity for relining the furnace is 21 (hours) × 600 (degrees / hour) × 0.8 (yuan / degrees) = 10080 yuan;

[0005] 3. The cooling time of the furnace body is long: it takes about 46-48 hours to rebuild the furnace lining from the furnace body to empty and cool to room temperature;

[0006] 4. Rebuilding the furnace requires 4-6 furnace repair personnel, working 24 hours (3 working days), which takes a long time and requires a lot of labor

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