What is the role of silica in refractory materials

Posted by ariel li on August 28th, 2017

The natural minerals of silica are called quartz. Refractory materials, clay and siliceous refractory material contain more silica. Silica is acidic at high temperatures, and siliceous refractories are resistant to acid residue corrosion.

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 brick containing SiO2 between 45% and 65%, are weak acid refractory, Have a certain resistance, but easy to be alkaline slag erosion.

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. China's literature generally referred to these products as "silicon refractory products", one of the most important is the silica fire brick.

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