Describe Bayer's process for concentration of bauxite with all chemical equations .
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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.[1] The aluminium oxide must be purified before it can be refined to aluminium metal.
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Baeyer's process is used to obtain pure alumina. Bauxite ore usually contains impurities of iron xide , silica and titanium oxide . The powdered ore is heated with a concentrated solution of at 473-523 K. The alumina dissolves forming sodium meta aluminate and silica as sodium silicate, leaving behind the impurities
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