Separation and/or purification of precious metals

Details Separation and/or purification of precious metals Separation and/or purification of precious metals

1975-08-29

1976-12-14

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75108, 423 22, 423 44, 423 88, 423 97, 423508, 423593, C22B 1100

Patent

active

039973379

ABSTRACT:
A process for the treatment of a concentrate of by-metals comprises heating he concentrate at between 1100.degree. C and 1500.degree. C, preferably at about 1300.degree. C, in a gaseous stream which comprises oxygen. The heating step is effected for a period of time sufficient to ensure quantitative removal of one or more of lead, arsenic, silver, bismuth and/or tellurium and the oxidation of ruthenium, rhodium and iridium to their oxides.

REFERENCES:
patent: 3413114 (1968-11-01), Illis et al.

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