During electrolytic reduction of aluminium, alumina melts at approximately (temperature):
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The electrolysis of pure alumina faces some difficulties. Pure alumina is a bad conductor of electricity. The fusion temperature of pure alumina is about 2000∘C and at this temperature when electrolysis is carried out on the fused mass, the metal formed vaporizes, as the boiling point of aluminium is 1800∘C. These difficulties are overcome by using a mixture containing alumina, cryolite (Na3.AlF6), and fluorspar (CaF2) which forms a melt with lower melting temperature.
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about 1000 degree celcius
Explanation:
about 1000 with a small percentage of alumina dissolved in it, its melting point drops to about 1000 degree celcius
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