Silica insulating brick description

Silica insulating bricks are made of silica as the main raw material and having a SiO2 content of not less than 91%. In addition to its thermal insulation properties, silica insulating bricks maintain the characteristics of silica bricks to a large extent. The load softening starts at a high temperature. During the heating process, the volume expands slightly, which enhances the integrity of the furnace. The silica insulating brick is made of finely pulverized silica, and a part of waste silica brick or waste silica insulating brick powder, a mineralizer and a burn-in additive are added.According to a certain ratio, add water to the cement in the mixing machine to form a mud material. After mechanical or manual molding, the residual moisture of the brick blank after drying is less than 0.5%. In order to prevent the violent volume expansion caused by the polycrystalline transformation of SiO2, the product is cracked, and a relatively slow temperature rise and fall is required for firing. This product is suitable for industrial furnace linings or for thermal insulation layers where the working temperature does not exceed 1550 °C, does not directly contact with high-temperature molten materials and is not directly affected by aggressive gases.