What is the main material of silica brick

An acidic refractory material mainly composed of tridymite, cristobalite and a small amount of residual quartz and glass phase.

The silica content is above 94%. The true density is 2.35g/cm3. It has resistance to acid slag erosion. Higher high temperature strength. The starting temperature of load softening is 1620～1670℃. It will not deform after long-term use at high temperature. Low thermal shock stability (1~4 times of heat exchange in water) Natural silica is used as raw material, and a proper amount of mineralizer is added to promote the conversion of quartz in the green body into phosphorite. Slowly fired at 1350～1430℃ in reducing atmosphere. When heated to 1450℃, there will be about 1.5~2.2% of the total volume expansion. This residual expansion will make the cut joints tightly and ensure that the masonry has good air tightness and structural strength.