The product has been used and tested for a long time, and has the characteritics of long senvice ite, high strength, good thermal insulation perormance, strong wear resistance, good volume stabilty, good thermal shock stability and strong permeability resistance.The gas tightness and coking rate of coke oven can be greally improved, and the utlization rate of coke oven can be greatly improved and the production cost can be reduced.Coke smoke emission and tar leakage grealtly reduced,The service ife of the furnace door frame is prolonged and the maintenance and repair costs are reduced.The whole prefabricated brick of fumace door adopts high temperature prolonged and the maintenance and repair costs are reduced.The whole prefabricated brick of fumace door adopts high temperature thermal insulation performance, ant-corrosion perormance and sealing property.