METHOD FOR PRESSURE OXIDIZING GOLD-BEARING REFRACTORY SULFIDE ORES HAVING ORGANIC CARBON

A method for treating refractory gold-bearing ores that have both sulfi de material with which the gold is associated and from which the gold is dificu lt to separate and having organic carbonaceous material having an affinity for at least one of gold and a gold complex. A feed slurry (2) comprising...

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Bibliographische Detailangaben
Hauptverfasser:	SIMMONS, GARY L, GATHJE, JOHN C
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INORGANIC CHEMISTRY METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A method for treating refractory gold-bearing ores that have both sulfi de material with which the gold is associated and from which the gold is dificu lt to separate and having organic carbonaceous material having an affinity for at least one of gold and a gold complex. A feed slurry (2) comprising the mineral material feed slurried in an aqueous liquid, is subjected to pressur e oxidation (6). A gas (4) that is rich in oxygen is contacted with the feed slurry to provide oxygen to oxidize sulfide sulfur in the mineral material t o a sulfate form. Offgases (10) are collected for treatment and eventual release . The effluent product (8) includes solid effluent comprising gold, which can be effectively recovered by carbon-in-leach cyanidation of the effluent product . In many cases, gold recovery according to the present invention is increas ed substantially over standard pressure oxidation techniques.