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The bauxite (red-brown solid) - aluminium oxide mixed with impurities-is extracted from the earth. The extracted aluminium oxide is then treated with alkali, to remove the impurities. This results in a white solid called aluminium oxide or alumina.
Mining Aluminum is one of the most plentiful metals in the earth's crust. It is naturally found in the form of bauxite, an ore containing aluminum oxide, or alumina.We surface mine bauxite from reserves in Australia, Brazil, Suriname, Jamaica and other parts of the world, processing most of it into alumina.ining Aluminum is one of the most plentiful metals in the earth's crust. It is naturally found in the form of bauxite, an ore containing aluminum oxide, or alumina.