Semi-dry method gun mix for coal oven reparing

Abstract

A reparing material for reparing the coke oven by spraying the semi-dried it is prepared from the raw Al-Si material chosen from mullite, high-Al alumine, etc. high-Al cement or calcium aluminate cement, soft clay, kyanite, Al2O3 and/or SiO2 powder, and naphthalenesulfonic acid-formaldehyde condensate. Its advantages are high adhesion, strength, heat shock resistance and antiwear performance, and low cost.

Description

technical field [0001] The invention relates to a semi-dry gunning material for repairing coke ovens, which belongs to the technical field of refractory material manufacturing. Background technique [0002] The coke oven is the main equipment of coking, and its function is to carry out dry distillation of coking coal in the carbonization chamber to obtain coke and other by-products. After the coke oven is put into production, due to the temperature stress, mechanical stress and chemical corrosion caused by repeated operations such as coal charging, door removal, and coke pushing, the various parts of the furnace body gradually change. Therefore, the coke oven is damaged year by year during use, especially the carbonization chamber and furnace head. There is only traditional wet repair technology in domestic coke oven body maintenance technology. On the one hand, wet repair will cause the hot furnace wall to be impacted by rapid cooling, which will damage the surface structu...

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Problems solved by technology

Due to environmental protection requirements