METHOD FOR LEACHING OUT NICKEL FROM SULFIDE ORE

PROBLEM TO BE SOLVED: To provide a method for economically leaching out nickel from a low-grade nickel-contg. sulfide ore which is unprofitable to the conventional method. SOLUTION: A low-grade nickel-contg. sulfide ore such as the tailings of nickel flotation is suspended in an aq. sulfuric acidaci...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAYAMA RYOICHI, SAWADA MITSURU
Format:	Patent
Sprache:	eng
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:	PROBLEM TO BE SOLVED: To provide a method for economically leaching out nickel from a low-grade nickel-contg. sulfide ore which is unprofitable to the conventional method. SOLUTION: A low-grade nickel-contg. sulfide ore such as the tailings of nickel flotation is suspended in an aq. sulfuric acidacidified soln., the previously cultured iron oxidizing bacteria and sulfur oxidizing bacteria are inoculated, air is supplied into the soln. by shaking and stirring while keeping the suspension at the optimum temp. for the growth of the bacteria, and nickel is leached out as nickel ion. Thiobacillus ferrooxidans is used as the iron oxidizing bacteria and Thiobacillus thiooxidans as the sulfur oxidizing bacteria.