Aluminium The most commercially mined aluminium ore is bauxite, as it has the highest content of the base metal. The primary aluminium production process consists of three stages. First is mining of bauxite, followed by refining of bauxite to alumina and finally smelting of alumina to aluminium. India has the fifth largest bauxite reserves with deposits of about 3 bn tonnes or 5% of world deposits . India’s share in world aluminium capacity rests at about 3% . Production of 1 tonne of aluminium requires 2 tonnes of alumina while production of 1 tonne of alumina requires 2 to 3 tonnes of bauxite. The aluminium production process can be categorised into upstream and downstream activities. The upstream process involves mining and refining while the downstream process involves smelting and casting & fabricating. Downstream-fabricated products consist of rods, sheets, extrusions and foils. Power is amongst the largest cost component in manufacturing of aluminium, as the production inv...
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