Calcined bauxite is an important raw material for two main products, refractory and abrasives. Smaller volumes are consumed in other applications including proppant, welding fluxes and antiskid surface. While the process of calcining bauxite for each of these applications is fundamentally the same (i.e. it involve the same basic burning process), the physical and chemical characteristic of each grade vary. Calcined bauxite is classified by the major end use abrasive and refractory.
