Aluminum dross recovery process

Details Aluminum dross recovery process Aluminum dross recovery process

1991-06-12

1992-04-07

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

C22B 2100

Patent

active

051024535

ABSTRACT:
A method for recovering reusable materials from aluminum dross is disclosed comprising crushing the dross and extracting solubles therefrom with water in a digester. The brine so obtained is processed in a crystallizer to obtain fluxing materials contained therein, and the insolubles are furnaced to separate the free aluminum metal therefrom. To prevent undesirable reactions from occurring in the digester which result in the production of hazardous and noxious products, the pH in the digester is controlled below about 8, and preferably above about 5, by withdrawing a magnesium chloride-containing stream from the crystallizer and introducing it into the digester.

REFERENCES:
patent: 4073644 (1978-02-01), Papafingos

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