Aluminum purification system

Details Aluminum purification system Aluminum purification system

1980-06-20

1983-12-06

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 68A, C22B 2102

Patent

active

044191260

ABSTRACT:
A method for extracting aluminum of substantial purity from furnace products resulting from carbothermic reduction of alumina-bearing ores and contaminated with up to about 30 weight percent of aluminum carbide is disclosed. The method involves contacting the furnace product with a high alumina-containing molten slag in the substantial absence of reactive carbon, so as to cause the alumina-containing slag to react with the aluminum carbide, thereby diminishing the aluminum carbide content of the furnace product to the level of 4-10% aluminum carbide by weight. It further involves heating the partially purified furnace product in the absence of both reactive carbon and slag, thereby reacting the self-contained alumina with the aluminum carbide contaminant to produce a purified aluminum.

REFERENCES:
patent: 3929456 (1975-12-01), Kibby

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