Silica Insulating Brick

Silica insulating brick is made from silica or crystalline quartzite raw materials that contains more than 90% of SiO2. The bulk density of lightweight silica insulating brick is lower than 1.2g/cm3. Combustible materials such as coke, anthracite, saw powder, carbonized rice shell are added into batch material to make lightweight silica insulating brick, as they will burn during high temperature sintering and   form porous structure. Another method to make lightweight silica brick is gas foaming method. mineralizers( CaO, Fe2O3) are use to contribute to the transformation of quartz. During the sintering of lightweight silica insulating bricks, strong oxidizing flame should be maintained to ensure the complete combustion of combustible materials.