Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1974-06-19
1976-09-07
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 83, 423 22, C22D 700
Patent
active
039792056
ABSTRACT:
The present invention is a method of treating sea or land carbonaceous ore or reconstituted, formerly carbonaceous ore to recover therefrom noble metal values. If sea ore is used, noble metal containing composite organic material is first separated from any shells or sand that may be present. Flotation techniques are then utilized to form a carbonaceous concentrate, which is next mixed with a strong oxidizing agent. The mixture may either be heated to provide autogenously ignition or ignition may alternatively be accomplished by compounding the mixture into electrodes and using electric arc. If stoichiometric quantities of the oxidizing agent are used, the oxidation-reduction reaction, which consumes all carbon present, is of sufficient energy to drive the noble metals and/or their compounds into the vapor phase forming a particulate plasma, from which the elemental metals or their compounds may be condensed and/or precipitated. If non-stoichiometric quantities of oxidant are used, recovery of the sought metals may be had from the ash by techniques well known to those skilled in the art.
REFERENCES:
patent: 3819363 (1974-06-01), Wanzenberg
Andrews M. J.
Greenawalt Guy A.
Ward Robert M.
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