Electrolytic refining of molten metal

Details Electrolytic refining of molten metal Electrolytic refining of molten metal

1981-10-05

1983-09-20

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

204 70, 204243R, 204245, 204268, C25C 306, C25C 308, C25C 304

Patent

active

044054157

ABSTRACT:
In a process for refining Al or Mg a stream of relatively impure molten metal is passed along one face of a grille separator having interstices of the order of 0.1-1 cm in width. The interstices are filled with a molten salt electrolyte adapted to transport ions of the selected metal (Al or Mg) to a body of refined metal on the opposite side of the separator. The relatively impure metal is made in the anode and the refined metal is the cathode. Refined metal is progressively withdrawn from the cathode. The grille separator may be arranged substantially vertical or substantially horizontal, usually with slight inclination. Passages are preferably provided in the separator to allow escape of gas generated at a metal/electrolyte interface.

REFERENCES:
patent: 3488271 (1970-01-01), Kummer et al.
patent: 4058448 (1977-11-01), Muzhzhavley et al.
patent: 4118292 (1978-10-01), Frey et al.
patent: 4334975 (1982-06-01), Ishizuka
patent: 4338177 (1982-07-01), Withers et al.

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