Question

What are the stages in bauxite extraction

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Answer 1

Bauxite is usually strip mined because it is almost always found near the surface of the terrain, with little or no overburden. ... Usually, bauxite ore is heated in a pressure vessel along with a sodium hydroxide solution at a temperature of 150 to 200 °C (300 to 390 °F).

The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide).Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al2O3), the rest being a mixture of silica, various iron oxides, and titanium dioxide.