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Bayer process |
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Bayer process, procedure for obtaining alumina from the aluminum ore bauxite. The alumina can then be used for various industrial purposes or smelted to provide aluminum. The first step in the process is the mixing of ground bauxite into a solution of sodium hydroxide. By applying steam and pressure in tanks containing the mixture, the bauxite slowly dissolves. The alumina released reacts with the sodium hydroxide to form sodium aluminate. After the contents of the tank have passed through other vessels where the pressure and temperature are reduced and impurities are removed, the solution of sodium aluminate is placed in a special tank where the alumina is precipitated out. The precipitate is removed from the tank, washed, and heated in a kiln to drive off any water present. The residue is a commercially pure alumina. Bayer process [′bī·ər ‚präs·əs] (metallurgy) A method of producing alumina from bauxite by heating it in a sodium hydroxide solution. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Stamixco LLC says the Bayer process also allows the mixers to be made and sold at lower cost. The Bayer process uses caustic soda to digest the ore and solubulize the alumina from the bauxite as sodium aluminate. Gandhamardan's low silica content makes it ideal for the production of alumina by the long established Bayer Process. |
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