Silicon brick is an acidic refractory material with good resistance to acid slag erosion. The load softening temperature can reach as high as 1640~1670 ℃, and its volume is relatively stable when used for a long time at high temperatures. The silicon dioxide content is above 94%. True density 2.35g/cm3. Has acid resistant slag erosion performance. Higher high-temperature strength. The starting temperature for load softening is 1620~1670 ℃. Long term use at high temperatures without deformation. Low thermal shock stability (1-4 times of heat exchange in water) is achieved by using natural silica as raw material and adding an appropriate amount of mineralizer to promote the conversion of quartz into quartz in the green body. Slowly fired at 1350~1430 ℃ in a reducing atmosphere. When heated to 1450 ℃, there is a total volume expansion of about 1.5-2.2%, which residual expansion will make the cut joints close, ensuring good airtightness and structural strength of the masonry.

The raw material for manufacturing silica bricks is silica. The higher the SiO2 content of silica raw material, the higher the fire resistance. Harmful impurities such as Al2O3, K2O, Na2O, etc. seriously reduce the fire resistance of refractory products. Silicon bricks are made from silica with a SiO2 content of not less than 96%, with mineralizers (such as iron scale and lime milk) and binders (such as molasses and sulfite pulp waste) added. They are then mixed, formed, dried, and fired.

Mainly used for the partition walls of the carbonization chamber and combustion chamber of coke ovens, the regenerative chamber and sediment chamber of steel making open hearth furnaces, the refractory materials of soaking pits, glass furnaces, and ceramic firing kilns, as well as other load-bearing parts of kilns. It is also used in the high-temperature load-bearing parts of hot air furnaces and the top of acidic open hearth furnaces.