Calcined bauxite is produced by sintering high alumina bauxite in rotary, round or shaft kilns at high temperatures.
This process of calcining (heating) bauxite in kilns removes moisture and imparts high alumina content and refractoriness, low iron oxide levels, and hardness.
Due to its high mechanical strength and resistance to molten slag, as well as thermal stability, calcined bauxite is an ideal raw material for the production of many refractory, abrasive and specialty products.
Bauxite has a number of advantages:
Bauxite is the main raw material to produce shaped and unshaped alumina refractory elements. Also, bauxite is used to obtain pure aluminum, in the manufacture of ceramic products, welding electrodes, dyes, abrasive elements, as materials that reduce the melting point of ore in ferrous metallurgy, as well as filters for cleaning oil products from impurity particles and compounds.