Coke oven burner hot-repairing material and preparation method thereof

Abstract

The invention provides a coke oven burner hot-repairing material and a preparation method thereof. The coke oven burner hot-repairing material is prepared from the following raw materials in percentage by weight: 45-55% of aluminum silicate aggregate, 12-25% of waste silica brick, 15-25% of high-aluminum alumina, 5-20% of silica micro powder and 8-15% of phosphate bonding agent. The preparation method comprises the following steps: mixing the raw materials taken according to the weight percentages in a stirring machine for 10-30 minutes; after the raw materials are uniformly mixed, putting the mixture into a sealing barrel; standing for 2-3 days for aging to obtain the coke oven burner hot-repairing material. The main crystal phases of the hot-repairing material provided by the invention are corundum and mullite, and the hot-repairing material has good thermal shock resistance and water resistance; since the tridymite degree of the raw material waste silica brick powder is high, the high-temperature volume stability of the material can be improved, and the material can be tightly combined with a silica brick matrix to avoid cracking and shrinkage in a thermal state, thereby prolonging the service life of the burner. The burner part has a flat surface after being repaired, and the phenomenon of second burning caused by coke clamping a frame can be avoided.

Description

technical field [0001] The invention belongs to the field of coking refractory materials, and in particular relates to a hot repair material for the burner head of a coke oven and a preparation method thereof. Background technique [0002] In the daily production operation, the furnace head of the coke oven is easy to be corroded and damaged due to repeated removal of the furnace door, and the temperature changes drastically. Especially the furnace shoulder area is in direct contact with the iron parts, and the heat damage is large and the damage is serious. At the end of the life of the coke oven, the shoulder gap will further expand, causing coke to be framed, difficult to push coke, and even secondary coke. Because the coke oven is mainly built by silica bricks, the special crystal transformation of silica bricks is irreversible, and cold repair is not allowed. Common plastering mud such as fire clay will produce cracks and shrink when repaired in hot state, and the stren...

AI Technical Summary

Problems solved by technology

At the end of the life of the coke oven, the shoulder gap will further expand, resulting in coke clamping, difficulty in coke pushing, and even secondary coke

Because the coke oven is mainly built by silica bricks, the special crystal transformation of silica bricks is irreversible, and cold repair is not allowed. Common plastering mud such as fire clay will produce cracks and shrink when repaired in hot state, and the strength after repair is up to Less than the requirements, the material hanging time is short, serious will cause further damage to the matrix silica brick

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