Washing of alumina in washing plant

and used once more to dissolve fresh alumina 416 Calcination Calcination involves washing and drying the alumina hydrate Al2O33H2O, then heating it to about 1,000 C to drive off chemically bined water The final product is alumina Al2O3 a dry, pure white, sandlike material, which is the feedstock for aluminium smelters
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