Coke oven silica brick is the crystallization of the SiO 2 > 98.5% silica as raw material, composite mineralizer and ingredients of the low total content of impurities, the finished product is low density, residual quartz content is not more than 1%, the hotline low inflation rate, compression strength, small linear change, product size precision, neat appearance, can be widely used in various parts of the coke oven.