Leaching method of nickel-containing ore

• Main Authors: WANG KUITING, GAO BAOJUN, LIU JINSHAN, LU YEDA
• Format: Patent
• Language: Chinese; English
• Published: 10.08.2011
• Subjects: 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

The invention provides a leaching method of a nickel-containing ore, comprising the following steps: A) mixing the nickel-containing ore with sulfuric acid solution and performing sulfuric acid leaching to obtain leaching solution which contains nickel sulfate; B) purifying the leaching solution to obtain nickel sulfate solution; C) mixing the nickel sulfate solution with calcium oxide and/or calcium hydroxide and calcium sulfate which is used as the seed crystal to generate calcium sulfate precipitation and nickel hydroxide precipitation; and D) separating the calcium sulfate from the nickelhydroxide. In the invention, metallic elements can be recovered from the nickel-containing ore with low cost and low pollution, thereby realizing the recycle of resources, producing the calcium sulfate (plaster) incidentally, lowering production cost and lightening environmental pollution.