Process for the removal of arsenic compounds from tungsten or mo

Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes

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423 53, 423 61, 423 87, 423593, C22B 111, C22B 112, C01G 3900, C01G 4100

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044577761

ABSTRACT:
A process for the removal of arsenic compounds from tungsten and/or molybdenum concentrates by selective extraction, characterized in that the concentrates are extracted with an aqueous solution of a ferric compound of a pH below 2.5 and a temperature of at least 60.degree. C.

REFERENCES:
patent: 3220796 (1965-11-01), Espinosa
patent: 3674424 (1972-07-01), Stanley et al.
patent: 4242124 (1980-12-01), Makipirtti
Dorfler et al., "Journal of Metals", May 1981, pp. 48-54.

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