What isthe roleofcryolitein themetallurgy ofaluminium ? – InterviewSolution

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1.	What isthe roleofcryolitein themetallurgy ofaluminium ?
Answer» Solution :The ROLE ofcryolite in the metallurgyof aluminium istwo- fold : (i) Fusedalumina`(Al_2 O_ 3 ) ` is abadconductorofelectricitybuttheadditionofcryolite` (NaAlF_ 6 )`MAKES itgoodconductor. As ARESULT,aluminiumcan beobtainedbyelectrolysis. (ii) Themeltingpoint of purealuminaisveryhigh (2323 K ) BUTTHE additionofcryolitelowersthemeltingpointthemixtureto around1140 K. As aresult,electrolysisiscarriedoutat amuchlowertemperature (1173 K ) whichsaves LOT ofelectricity.

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