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公开(公告)号：EP1851346A4
公开(公告)日：2009-11-11
申请号：EP06704863
申请日：2006-02-13
CPC分类号： C22B23/043 , C22B23/0461
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2.发明公开
公开(公告)号：EP1644541A4
公开(公告)日：2008-06-11
申请号：EP04737564
申请日：2004-07-13
CPC分类号： C22B23/0453 , C22B23/043
摘要： A process for the recovery of nickel and cobalt from laterite ores, the process including the steps of: a) beneficiating the ore to separate it into a beneficiated upgraded ore fraction and a coarse, siliceous low grade rejects fraction which is substantially free from fines and clay materials; b) separately processing the upgraded ore fraction for the recovery of nickel and cobalt; and c) subjecting the low grade rejects fraction to a heap leach process with an acid supplemented solution to create a heap leachate for further nickel and cobalt recovery processing.
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公开(公告)号：EP1851345A4
公开(公告)日：2009-11-04
申请号：EP06704902
申请日：2006-02-23
发明人： DUARTE ALEXEY , LIU HOUYUAN , RATCHEV IVAN
CPC分类号： C21B15/00 , C22B1/244 , C22B3/42 , C22B5/12 , C22B23/023 , C22B23/0453 , Y02P10/234
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4.发明公开
公开(公告)号：EP1825010A4
公开(公告)日：2009-08-19
申请号：EP05805564
申请日：2005-11-16
发明人： LIU HOUYUAN , DUARTE ALEXEY , MEIHACK WOLF
CPC分类号： C22B23/0461 , C22B23/0415 , C22B23/043
摘要： A process for the recovery of nickel and cobalt from nickel and cobalt containing ores, including the steps of first leaching a laterite ore and/or a partially oxidised sulfide ore with an acid solution to produce a pregnant leach solution containing at least dissolved nickel, cobalt and ferric ions, and subsequently leaching a sulfide ore or concentrate with the pregnant leach solution to produce a product liquor. Alternatively, the laterite ore and/or partially oxidised sulfide ore can be leached in a combined leach with the sulfide ore or concentrate. The ferric ion content in the pregnant leach solution or in the combined leach is sufficient to maintain the oxidation and reduction potential in the sulfide leach high enough to assist in leaching nickel from the sulfide ore or concentrate.
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5.发明公开PRODUCTION OF FERRO-NICKEL OR NICKEL MATTE BY A COMBINED HYDROMETALLURGICAL AND PYROMETALLURGICAL PROCESS 审中-公开铁镍或镍垫的由联合的水电和冶金火法冶金工艺生产
公开(公告)号：EP1794331A4
公开(公告)日：2009-07-29
申请号：EP05778950
申请日：2005-09-14
发明人： LIU HOUYUAN , DUARTE ALEXEY , MEIHACK WOLF , RATCHEV IVAN P
CPC分类号： C22B23/021 , C22B3/42 , C22B3/44 , C22B5/10 , C22B23/043 , C22B23/0453 , C22B23/0461 , C22B23/0476 , C22B23/06 , Y02P10/216 , Y02P10/234
摘要： A process for the production of ferro-nickel or nickel matte from a product liquor solution containing at least nickel, cobalt, iron and acid soluble impurities, said process including the steps of: (a) contacting the product liquor solution (7) containing the nickel, cobalt, iron and acid soluble impurities with an ion exchange resin (8), wherein the resin selectively absorbs nickel and iron from the solution leaving the cobalt and the acid soluble impurities in the raffinate (9); (b) stripping the nickel and iron from the resin with a sulfuric acid solution to produce an eluate (11) containing nickel and iron; (c) neutralising the eluate to precipitate a mixed nickel iron hydroxide product (13); and (d) reducing and smelting the mixed nickel iron hydroxide product to produce ferro-nickel (29) or nickel matte (24).
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