| 摘要 |
A process for smelting aluminum from a mixture of a double salt potassium-aluminum sulfate 2KAl(SO4)2 and aluminum sulfate Al2 (SO4)3 with potassium sulfate K2SO4 having a weight ratio of 2KAl(SO4)2 to K2SO4 in the range of 50/50 to 15/85. The mixture is heated to a eutectic temperature that makes it molten and electrolysis is used to precipitate out aluminum at the negative electrode and gases from SO4 ions at the positive electrode. A critical amount of a feed of 2KAl(SO4)2 is added to replace that which was consumed in the electrolysis and to maintain the weight ratio which provides for the low eutectic melting temperature.
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