METHOD FOR RECOVERING NICKEL FROM NICKEL SULFIDE

PURPOSE:To economically recover nickel from nickel sulfide in the form of an aq. soln. by treating the nickel sulfide in an aq. soln. contg. proper amounts of sulfuric acid and Cl ions by blowing air until a proper redox potential is attained. CONSTITUTION:When metallic nickel is electrolytically re...

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Bibliographische Detailangaben
Hauptverfasser:	TSUNEYAMA NOBUKI, OKABAYASHI MASAKATSU, TSUCHIDA NAOYUKI, NAKAGAWA TAKESHI, SATO MASAHARU
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:	PURPOSE:To economically recover nickel from nickel sulfide in the form of an aq. soln. by treating the nickel sulfide in an aq. soln. contg. proper amounts of sulfuric acid and Cl ions by blowing air until a proper redox potential is attained. CONSTITUTION:When metallic nickel is electrolytically refined with nickel matte as the anode, slime is produced on the anode. The slime or residue obtd. by removing part of elementary sulfur from the slime is added to water to prepare a slurry having about 200-300g/l concn. The slurry is filtered and >=70g/l, preferably about 80-250g/l sulfuric acid and >=10g/l, preferably about 35-50g/l ions are added to the resulting aq. soln. The Cl ions are added in the form of NaCl or the like. The aq. soln. is then heated and held at about 80-100 deg.C and air or oxygen enriched air is blown until >=550mV redox potential is attained. Thus, nickel is economically recovered from the nickel sulfide in the form of an aq. soln. without using gaseous chlorine.