What are the impurities found in bauxite?
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The major impurities in Bauxite are iron oxides (goethite & hematite), silicon dioxide, the clay mineral kaolinite as well as small amounts of anatase (TiO2). Consequently, its composition varies considerably with alumina constituting from about 50% to about 70%.
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Leaching is often used if the ore is soluble in some suitable solvent. Bauxite is purified using leaching.
Bauxite is the principal ore of aluminium.
It usually contains SSiO2, iron oxides and titanium oxide (TiO2) as impurities.
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