Calcined Bauxite


Bauxite is one of the main ores of aluminum, consisting mainly of aluminum oxides.

Calcined bauxite is obtained by calcining (heating/sintering) of low iron, low alkali containing raw bauxites at temperatures of 1600°C-1800°C. In this calcination process the high refractory mineral phases corundum and mullite are formed.

Therefore calcined bauxite is one of the most important raw materials for the production of shaped and unshaped refractories for the steel industry, foundries, glass and cement plants. Refractory grade calcined bauxite is used as feed stock for production of high alumina refractory bricks, castables, plastics and ramming mixes.

The calcined refractory grade bauxite is also used in unfired monolithic refractories.