Silica refractories is refractory to silica as the main ingredients, including silica brick, special brick, quartz glass and glass products. Silica fire brick is a silica as raw material, using lime, iron and phosphorus, pulp waste liquid as binder and mineralizing agent, acid refractory material sintering at high temperature.
The acidic slag resistance ability is strong, but strong alkaline slag erosion, easily and destroy the Al2O3, K2O, Na2O and other oxides, has good resistance to CaO, FeO, Fe2O3 and other oxides. Its high refractoriness under load, the volume expansion of small, good heat conductivity. Residual expansion to ensure the masonry with air tightness and good structure strength, at present is still good for coke oven furnace building materials, glass furnace, hot blast furnace, brick down draft kiln and tunnel kiln, smelting and acidic steelmaking furnace and other thermal equipment.
But the biggest drawback is the low thermal shock stability, refractory degree is not high, which limits its wide application.以上
