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name of machine used to extract aluminium

name of machine used to extract aluminium

The next stage in the production chain is the processing of bauxite into alumina, or aluminium oxide al o , a white powderThe most common process for making alumina from bauxite is the bayer process, which was first discovered over years ago but is still in wide use today

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  • Aluminum Mining and Processing  Everything you Need to

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    Using the bayer process, which involves the use of heat, pressure and sodium hydroxide, the aluminum oxide is separated from impurities, as well as iron ore the white crystals of aluminum oxide are washed and heated to extract water, resulting in the white powdery aluminum oxide thats used during smelting to produce aluminum

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    The bayer process is the principal industrial means of refining bauxite to produce alumina aluminium oxide and was developed by carl josef bayerBauxite, the most important ore of aluminium, contains only aluminium oxide al o , the rest being a mixture of silica, various iron oxides, and titanium dioxide the aluminium oxide must be purified before it can be refined to

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    Apr , to extract aluminum, the bauxite ore is first crushed, then mixed with lime, hot water and soda ash this mixture is placed into a digester, where it is heated under steam pressure caustic soda is added, which dissolves the alumina from the ore the other impurities are left as solids after this, a filter separates the solids from the solution

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    Aluminum is the most abundant metal in the earths crust and is a constituent of many minerals however, the material which is highest in aluminum and most free from objectionable impurities is bauxite which, therefore, is practically the only source of the metal under present processes bauxite is the general name given to the hydrated oxides of aluminum it contains varying amounts of

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