Production Of Aluminium O ide Is Usually Done Near Bau ite Quarry Why

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Aluminium oxide (sometimes known as alumina) is made by heating the aluminium hydroxide to a temperature of about 1100 - 1200°C. Conversion of the aluminium oxide into aluminium by electrolysis The aluminium oxide is electrolysed in solution in molten cryolite, Na 3 AlF 6 .

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Why is the purification of aluminum oxide usually done ...

Sep 23, 2015· Best Answer: if the content of alumina is 20% the rest is usually silica and iron bearing minerals. The iron content contribute to red mud waste in Bayer process. The iron content contribute to red mud waste in Bayer process.

Why is the purification of aluminium oxide usually done ...

Dec 15, 2012· Best Answer: The answer is that it isn't. Reduction of Bauxite to Aluminium is done using an electrolytic process and this requires huge amounts of electricity. -Power costs are usually higher than transportation costs so it is cheaper to take the ore to the power source, than vice versa.

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The aluminium production facilities in Russia reached 3.5 million tonnes annually, but the country lived through the dissolution of the Soviet Union and subsequent economic collapse. As Russia began to change their economic model aluminium production growth slowed.

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4 (b) Aluminium ore, bauxite, contains aluminium oxide, iron oxide and silicon dioxide. Aluminium is extracted by electrolysis of aluminium oxide. Bauxite Crushed and mixed with sodium hydroxide solution Solution of aluminium hydroxide with solid impurities Filtered Solution of aluminium hydroxide + 'Red mud' containing the solids

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