Silica is acidic at high temperatures, and siliceous refractories are resistant to acid residue corrosion. China's literature generally referred to these products as "silicon refractory products", one of the most important is the silica fire brick.ruizhirefractory.Low alumina clay refractory suppliers refers to the alumina content of 10% to 30%, SiO2 content of less than 85%, semi-silica refractory brick ≥ 65%SiO2 content of not less than 93%, natural quartzite as the main raw material of refractories known as silica, mainly silicon bricks, special silica bricks, quartz glass and its products.What is the role of silica in refractory materialsPosted by ruizhi refractory on August 28th, 2017The natural minerals of silica are called quartz.htmlEmail: sales@ruizhirefractory.The main raw material for the production of clay refractory brick is natural refractory clay, the main mineral is kaolinite (molecular formula Al2O3 · 2SiO2 · 2H2O), clay Modern leather grain Roller Coating Aluminium Sheets Factory brick containing SiO2 between 45% and 65%, are weak acid refractory, Have a certain resistance, but easy to be alkaline slag erosion.com/en/product.