Process for producing high-purity aluminum

Details Process for producing high-purity aluminum Process for producing high-purity aluminum

1982-07-29

1984-09-04

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 68R, C22B 2306

Patent

active

044695128

ABSTRACT:
To obtain a high-purity aluminum fraction from aluminum containing both eutectic impurities and peritectic impurities, the contents of these impurities in the original aluminum are reduced by melting the original aluminum to obtain molten aluminum, adding boron to the molten aluminum, and rotating a cooling body as immersed in the boron-containing molten aluminum while introducing a cooling fluid to the interior of the body to crystallize high-purity aluminum on the surface of the body. The peritectic impurities react with the boron to form metallic borides, which are centrifugally forced away from the cooling body by the rotation of the body without being incorporated into the aluminum crystallized on the surface of the body. The eutectic impurities are removed from the crystallized aluminum on the surface based on the principle of segregation.

REFERENCES:
patent: 3198625 (1965-08-01), Stroup
patent: 3211547 (1965-10-01), Jarrett et al.
patent: 3239899 (1966-03-01), Johnson
patent: 3543531 (1970-12-01), Adams
patent: 3671229 (1972-06-01), Ferber et al.

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