Semi-silica Brick

Semi-silica brick is a kind of quartz clay brick, which is an aluminous silicate refractory product with alumina content of 15-30%. It is generally made of refractory clay containing quartz sand, chlorite clay or tailings of kaolinite beneficiation as raw material. Its refractoriness is 1670 ℃, the load softening point is not less than 1250 ℃. Semi-silica bricks have better resistance to rapid cold and heat than silica bricks, and the volume stability is better than silica bricks. It is mainly used as the refractory layer of steel drum lining and steel pouring system. In addition, it can also be used for hot furnace roof, heat storage chamber lattice brick, iron furnace lining, various kiln furnace bottom and flue and other parts.