CRYOLITE AND ALUMINIUM

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Fill in the blanks and learn how cryolite is used in production of ALUMINIUM

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greenland

cryolite

Âge recommandé: 15 ans

3 fois fait

Anna Wielgopolan

Poland

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Compléter CRYOLITE AND ALUMINIUMVersion en ligne Fill in the blanks and learn how cryolite is used in production of ALUMINIUM par Anna Wielgopolan 1 ions 2000°C Al2O3 expensive lower temperature reduces alumina metal electricity cryolite Aluminium electrolysis is the most abundant on Earth , but it is expensive , largely because of the amount of used in the extraction process . Aluminium ore is called bauxite ( ) . The bauxite is purified to yield a white powder ? aluminium oxide ( also known as ) ? from which aluminium can be extracted . The extraction is done by , but first the aluminium oxide must be melted so that electricity can pass through it . However , aluminium oxide has a very high melting point ( over ) so it would be to melt it . Instead , it is dissolved in molten ? an aluminium compound with a melting point than aluminium oxide . The use of molten cryolite as a solvent some of the energy costs involved in extracting aluminium by allowing the in aluminium oxide to move freely at a lower .