Apparatus for lowering the concentration of sodium in aluminum m

Details Apparatus for lowering the concentration of sodium in aluminum m Apparatus for lowering the concentration of sodium in aluminum m

1978-10-13

1979-11-20

Andrews, M. J.

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By separating metal in a molten mass from undesired...

210 69, C22B 902

Patent

active

041748263

ABSTRACT:
The sodium content of aluminum melt is reduced efficiently to within acceptable limits by filtering the primary metal from the electrolytic cell through a loosely packed filter bed of granular material which in part comprises carbon. The treatment is carried out before alloy additions are made, and the temperature of the melt before entering the filter is higher than 780.degree. C.

REFERENCES:
patent: 3528801 (1970-09-01), Bylund et al.
patent: 3917242 (1975-11-01), Bass et al.

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