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Alumina Bauxite Produce

extraction process of aluminium from bauxite,apr 11, 2016 alumina extraction problem. in the standard bayer process for refining bauxite to produce alumina, the dissolution of the alumina in the ore to form sodium aluminate is accomplished in autoclaves under high pressures varying from 70 to 200 pounds per square inch. however, some lateritic bauxite ores are readily soluble in caustic, making aluminum is produced mineral,converting bauxite to alumina. step 1 - crushing and grinding alumina recovery begins by passing the bauxite through screens to sort it by size. it is then crushed to produce relatively uniformly sized material. this materials is fed into a large grinding mill where it is mixed with a caustic soda solution sodium hydroxide under high.

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