Fluxless recovery of metallic aluminum from wastes

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

C - Chemistry, Metallurgy

22

B

53/236

C22B 23/06 (2006.01) C22B 21/00 (2006.01)

Patent

CA 1074128

FLUXLESS RECOVERY OF METALLIC ALUMINUM FROM WASTES ABSTRACT OF THE DISCLOSURE 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 tempera- ture above the melting point of aluminum but below about 800°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 set- tling 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.

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