Sillimanite Powder

Aluminum Silicate :- Al₂SiO₅

SILLIMANITE is one of the three allotropic varieties of mineral corresponding to the formula Al₂O_3. SiO₂. The other two are anadalusite and kyanite. They all contain 63.2% Al₂O_3. and 36.8% SiO₂. They are distinguished from one another by their modes of occurrence and physical and optical properties.

Sillimanite refractories cut into various shapes and sizes or made out of bonded particles are used in industries like cement, ceramics, glass-making, metal smelting, refinery and treatment, tar distillation, coal carbonisation, chemicals manufacture, and iron foundries.

Industrial Applications : 
Appreciable quantity of sillimanite powder mixed with high-grade china-clay is used in the manufacture of spark plugs and other insulating materials required at high voltages. Sillimanite refractories cut into various shapes and sizes or made out of bonded particles are used in industries like cement, ceramics, glass-making, metal smelting, refinery and treatment, tar distillation, coal carbonisation, chemicals manufacture, and iron foundries. It is very resistant to glass slag and hence widely used as lining material in glass melting furnace. Iron corrodes it repidly hence it is not suitable in iron smelting. It is also not highly resistant to molten metallic oxides and, therefore, rather unsuitable for metallurgical operations.