Fluxless recovery of metallic aluminum from wastes

Details Fluxless recovery of metallic aluminum from wastes Fluxless recovery of metallic aluminum from wastes

1975-05-09

1976-12-28

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 24, C22B 2100

Patent

active

039999807

ABSTRACT:
Aluminum metal is recovered from processing wastes, such as dross, beverage can scrap and the like, without use of a flux by heating the wastes to a temperature above the melting point of aluminum but below about 800.degree. C while maintaining the wastes under a protective gaseous atmosphere which is substantially inert to molten aluminum. After melting of aluminum contained in the wastes is complete, the heated material is agitated gently to agglomerate the molten aluminum and to cause its settling and collection in the bottom of the containment vessel. Molten aluminum is thereafter removed from the vessel leaving a substantially inert residue. Argon is preferred as the protective atmosphere.

REFERENCES:
patent: 969253 (1910-09-01), Diack
patent: 1160430 (1915-11-01), Mellen
patent: 2754199 (1956-07-01), Stroup et al.
patent: 3649247 (1972-03-01), Brondyke
patent: 3770424 (1973-11-01), Floyd et al.
patent: 3848813 (1974-11-01), Stanczyk et al.

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