Alumina production

To produce primary aluminium, you need alumina. Alumina is extracted from bauxite via a process called refining. The refining process has two steps: first, the bauxite is dissolved with caustic soda to remove residues and obtain aluminium hydroxide; then, it is heated to remove the water contained in this hydroxide. After the refining process, alumina looks like a white powder similar to table salt.

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