How it's made - Norsk Hydro

How it's made. Raw material. Bauxite ... where the clay is washed off and the bauxite passes through a ... process. Alumina is separated from the bauxite by using a ...

Bayer process - Wikipedia

The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide). Bauxite, ... The aluminium oxide must be purified before ...

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