Process for the treatment of solid residues containing metals, i

Details Process for the treatment of solid residues containing metals, i Process for the treatment of solid residues containing metals, i

1996-12-11

1998-05-26

Simmons, David A.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75419, 75401, 75392, 75414, 75416, 75417, 75418, 75503, 75506, C22B 900

Patent

active

057558531

ABSTRACT:
This process comprises; mixing (1) the solid residues with a solid reducing agent; treating (2) the mixture in a furnace at a temperature above 1000.degree. C. to obtain (3) a vitrified product rendered poor in metals and an emission of gas enriched in metallic elements in a vapour phase; air quenching (4) the gases rich in metals; filtering (5) the products resulting from the air quenching to obtain secondary ashes rich in metallic salts; at the end of the filtering operation, washing the smoke (6) for discharging it to the atmosphere; and subjecting the secondary ashes rich in metallic salts to a treatment for producing a product rich in valuable metals (7 to 10).

REFERENCES:
patent: 3653875 (1972-04-01), Waters et al.
patent: 5259863 (1993-11-01), Schneider et al.
patent: 5653182 (1997-08-01), Sorvik

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