Extraction method for non-ferrous metals

Details Extraction method for non-ferrous metals Extraction method for non-ferrous metals

1975-02-07

1976-05-25

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75118R, 75120, 75121, 423 22, 423 44, 423 45, 423107, C22B 1500

Patent

active

039589854

ABSTRACT:
Non-ferrous metals are recovered from metal bearing ores or other metal sources in substantially quantitative yields by treating a finely divided metal bearing material with an aqueous inorganic acid to form a slurry and baking the slurry at atmospheric pressure and at a temperature of about 350.degree. to 800.degree.C. or higher under quiescent conditions for a period of time sufficient to convert the non-ferrous metals into soluble salts. The fumes from the baking process are scrubbed with a dilute acid solution to extract volatile metal salts. The residue is leached with an appropriate solution or solutions to recover the soluble metal salts which are then recovered from the solution by conventional techniques.

REFERENCES:
patent: 1305788 (1919-06-01), Ferguson
patent: 1415346 (1922-05-01), Hayward et al.
patent: 3726667 (1973-04-01), Fuchs
patent: 3868440 (1975-02-01), Lindblad et al.
Floe, Am. Ins. of Min. & Met. Engin., Tech. Pub. No. 768, Class D, No. 50, 1937.
Floe, Am. Ins. of Min. & Met. Engin., Tech. Publ. No. 735, Class D, No. 49, 1936.

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