HYDROMETALLURGICAL METHOD FOR DEVELOPING PERSISTENT COPPER-GOLD SULFIDE CONCENTRATES

FIELD: mining industry. SUBSTANCE: invention concerns recovering precious metals whose recovery using common leaching reagents is not efficient. Method of invention comprises adding 80-93% sulfuric acid to concentrate, stirring and heating resulting pulp to 200-250 C followed by stirring for further...

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Bibliographische Detailangaben
Hauptverfasser:	GORDIENKO V.V, ROGAZINSKIJ V.G, STARODUBTSEV N.P, MASLOV A.A, ZHERIN I.I, RESHETNIKOV M.P, LOZHKOMOEV S.N
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS 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:	FIELD: mining industry. SUBSTANCE: invention concerns recovering precious metals whose recovery using common leaching reagents is not efficient. Method of invention comprises adding 80-93% sulfuric acid to concentrate, stirring and heating resulting pulp to 200-250 C followed by stirring for further 5-6 h and leaching soluble sulfates. In the process, weight ratio of concentrate to sulfuric acid ranges from 1:3 to 1:5. Leaching of sulfates is accomplished by adding, at constant agitation, water to achieve pulp-to-water weight ratio 1:(3-5). After developing copper-gold concentrates according to present invention, concentration of copper in solid residues is lowered from 16% to 0.15- 0.20% and gold concentration from 183 g/t to 280-450 g/t. EFFECT: increased persistent concentrate development efficiency. 4 tbl