Alumina

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Alumina

Alumina is the industrial product derived from bauxite ore and is used to produce primary cast aluminium, as well as other non-metallurgical products (abrasives and insulating materials, refractory materials, detergents, pharmaceuticals and substances used in the treatment of water). Alumina, which is extracted from bauxite using the Bayer method, may be hydrated or calcined (anhydrous), depending on the degree to which it has been processed. Calcined alumina, also known as metallurgical grade alumina, is obtained by baking hydrated alumina, in order to remove the quantities of water contained in it.