Method for the assay and recovery of precious metals

Details Method for the assay and recovery of precious metals Method for the assay and recovery of precious metals

1992-12-22

1993-08-24

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75423, 75631, 75632, 75633, 75637, 204109, C22B 1100

Patent

active

052384853

ABSTRACT:
Complex ores of the precious metals which also contain iron spinels and similar compounds are assayed and their precious metals content is extracted by subjecting the ores or concentrates thereof together with an iron-embrittling agent to a pyrometallurgical process which reduces at least a major portion of the iron compounds to liquid metallic iron. The liquid iron serves as a collector metal for the precious metals and, after cooling, the iron is brittle and easily comminuted and can be separated from the precious metals through use of either an electrolytic process or a selective chemical dissolution of the iron and other base metals leaving the precious metals available for analysis and recovery.

REFERENCES:
patent: 3833353 (1974-09-01), Taylor

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