公开(公告)号：EP1499751B1

公开(公告)日：2007-11-28

申请号：EP03747346.9

申请日：2003-03-14

申请人： QNI Technology Pty. Ltd.

发明人： LIU, Houyuan ,  GILLASPIE, James, D. ,  LEWIS, Coralie, Adele ,  NEUDORF, David ,  BARNETT, Steven

IPC分类号： C22B23/00 ,  C22B3/08

CPC分类号： C22B23/043 ,  C22B23/0461

摘要： An atmospheric leach process in the recovery of nickel and cobalt from lateritic ores, said processing including the steps of: a) separating the lateritic ore into a low magnesium containing ore fraction, and a high magnesium containing ore fraction by selective mining or post mining classification; b) separately slurrying the separated ore fractions; c) leaching the low magnesium containing ore fraction with concentrated sulphuric acid as a primary leach step; and d) introducing the high magnesium content ore slurry following substantial completion of the primary leach step and precipitating iron as goethite or another low sulphate containing form of iron oxide or iron hydroxide, wherein sulphuric acid released during iron precipitation is used to leach the high magnesium ore fraction as a secondary leach step.

公开(公告)号：EP1851346A1

公开(公告)日：2007-11-07

申请号：EP06704863.7

申请日：2006-02-13

申请人： BHP Billiton Ssm Technology Pty Ltd.

发明人： LIU, Houyuan ,  KREBS, Damien Gary Ignatius

IPC分类号： C22B3/08 ,  C22B3/10 ,  C22B23/00

CPC分类号： C22B23/043 ,  C22B23/0461

摘要： A process for the recovery of nickel and cobalt from a nickeliferous laterite ore including the steps of : a) providing a nickeliferous laterite ore and separating that ore into its low magnesium limonite fraction and high magnesium saprolite fraction; b) treating the limonite fraction in acid solution in a primary high pressure leach step to produce a primary leach slurry; c) adding the saprolite fraction to the primary leach slurry to initiate precipitation of iron as goethite and/or hematite, while simultaneously releasing further acid from the iron precipitation, to effect a secondary atmospheric leach step, producing a secondary leach slurry; wherein all water used to prepare the ore slurries and/or acid solutions has an ionic composition that substantially avoids jarosite formation.

公开(公告)号：EP1778883A4

公开(公告)日：2007-08-29

申请号：EP05761684

申请日：2005-06-23

申请人： SKYE RESOURCES INC

发明人： NEUDORF DAVID ,  HUGGINS DAVID A

IPC分类号： C22B23/00 ,  C22B3/06 ,  C22B3/08 ,  C22B3/44

CPC分类号： C22B23/0415 ,  C22B23/043 ,  C22B23/0453 ,  C22B23/0461

摘要： A process for leaching laterite ores containing limonite and saprolite. Sufficient mineral acid is added to a slurry of limonite which is leached at atmospheric pressure to dissolve most of the soluble non-ferrous metals and soluble iron. After adding saprolite the slurry is further leached at a temperature above the normal boiling point and at a pressure above atmospheric pressure for a time sufficient to leach most of the contained nickel in the saprolite and to precipitate most of the iron in solution. The pressure of the slurry is then reduced, and nickel and/or cobalt is subsequently recovered from the leach solution by solvent extraction, resin-in-­pulp or other ion exchange, sulfide or hydroxide precipitation, or other recovery method.

公开(公告)号：EP1794331A1

公开(公告)日：2007-06-13

申请号：EP05778950.5

申请日：2005-09-14

申请人： BHP Billiton Ssm Technology Pty Ltd.

发明人： LIU, Houyuan ,  DUARTE, Alexey ,  MEIHACK, Wolf ,  RATCHEV, Ivan, P.

IPC分类号： C22B3/00 ,  C22B3/42 ,  C22B3/44 ,  C22B3/46 ,  C22B23/00

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).

公开(公告)号：EP1769092A1

公开(公告)日：2007-04-04

申请号：EP05752409.2

申请日：2005-06-22

申请人： European Nickel Plc

发明人： HUNTER, Colin, John

IPC分类号： C22B3/08

CPC分类号： C22B1/243 ,  C22B1/00 ,  C22B1/24 ,  C22B3/08 ,  C22B23/043 ,  C22B23/0461 ,  Y02P10/234

摘要： A method for the leaching of base metals from oxide ores, the method characterised by the method steps of: a) Separating the ore to be leached into fine and coarse fractions or streams; b) Leaching the coarse fraction of the ore in a leach solution with a suitable leach agent for the leaching of the contained metals; and Utilising the fine ore fraction or part thereof to neutralise or partially neutralise the leach agent contained in a pregnant leach solution produced in step b), prior to passing some or all of the pregnant leach solution on for further refinement or other treatment as required.

公开(公告)号：EP1546418A1

公开(公告)日：2005-06-29

申请号：EP03787516.8

申请日：2003-08-15

申请人： WMC Resources Ltd

发明人： CHAMBERLAIN, Anthony ,  TINDALL, Geoffrey ,  WEDDERBURN, B,

IPC分类号： C22B3/06 ,  C22B3/08 ,  C22B3/10 ,  C22B3/20 ,  C22B3/44 ,  C22B23/00

CPC分类号： C22B23/0461 ,  C22B3/44 ,  C22B15/0093 ,  C22B23/0415 ,  Y02P10/234 ,  Y02P10/236

摘要： A process for recovering valuable metals from laterite ores and concentrates that are contaminated with iron is disclosed. The process includes reducing ferric ions to ferrous ions in a leach liquor containing a valuable metal and iron in solution using a reductant, neutralising the liquor to reduce the free acid concentration in solution to levels suitable for nickel precipitation; and precipitating the valuable metal using the reductant and seed particles under process conditions, including one or more of seed particle size, seed composition, and temperature, that are selected to maximise nickel precipitation and to minimise iron precipitation.

公开(公告)号：EP1456426B1

公开(公告)日：2005-06-01

申请号：EP02790603.1

申请日：2002-12-20

申请人： Congo Mineral Developments Ltd ,  Anglo Operations Limited

发明人： LUNT, David, John ,  PRYOR, Bernard, Robert ,  COLETTE, Francois, Ferdinand, Joseph ,  WHYTE, Rodney, Murison ,  MANN, Jeremy, Wilson ,  ALEXANDER, Douglas ,  RAMSAY, Allen, Graham ,  CORTES, Gustavo, Adolfo, Tapia

IPC分类号： C22B23/00

CPC分类号： C22B23/0461

公开(公告)号：EP1458897B1

公开(公告)日：2005-04-13

申请号：EP02784969.4

申请日：2002-12-16

申请人： Falconbridge Limited

发明人： Buarzaiga, Mohamed ,  Marshall, Debbie ,  Boissoneault, Marc ,  Hoffman, Maxine ,  Potter, Carlton A.

IPC分类号： C22B23/00 ,  C22B3/08

CPC分类号： C22B23/0484 ,  C22B23/043 ,  C22B23/0461

摘要： A method is provided for the removal of chromium from leach liquors produced during high pressure leaching of laterite ores in an autoclave, by addition to the autoclave of carbon in a quantity of about 0.5% - 1% by weight with reference to the total dry feed.

公开(公告)号：EP1458897A1

公开(公告)日：2004-09-22

申请号：EP02784969.4

申请日：2002-12-16

申请人： Falconbridge Limited

发明人： Buarzaiga, Mohamed ,  Marshall, Debbie ,  Boissoneault, Marc ,  Hoffman, Maxine ,  Potter, Carlton A.

IPC分类号： C22B23/00 ,  C22B3/08

CPC分类号： C22B23/0484 ,  C22B23/043 ,  C22B23/0461

摘要： A method is provided for the removal of chromium from leach liquors produced during high pressure leaching of laterite ores in an autoclave, by addition to the autoclave of carbon in a quantity of about 0.5% - 1% by weight with reference to the total dry feed.

公开(公告)号：EP1232290A1

公开(公告)日：2002-08-21

申请号：EP00988492.5

申请日：2000-10-25

申请人： BHP MINERALS INTERNATIONAL INC.

发明人： ARROYO, J., Carlos ,  GILLASPIE, James, D. ,  NEUDORF, David, A. ,  WEENINK, Erik, M.

IPC分类号： C22B23/00 ,  C22B3/08 ,  C22B3/44

CPC分类号： C22B23/043 ,  C22B23/0461

摘要： A process is provided for the leaching of both the 'limonite' (Fe approx. ≥ 25 % and Mg approx. ≤ 6 %) and 'saprolite' (Fe approx. ≤ 20 % and Mg approx. ≥ 10 %) fractions of typical nickel and cobalt bearing laterite ore. The low magnesium fraction of the laterite ore is leached with sulfuric acid at high pressure and temperature to solubilize the metal values while precipitating most of the solubilized iron as hematite or other iron compounds and a portion of the dissolved aluminum as alunite or other aluminum compounds. After reducing the pressure of the leach slurry to approximately atmospheric pressure, the pregnant leach slurry or solution is contacted with the high magnesium fraction of the ore to solubilize most of the nickel contained in the high-magnesium ore fraction while dissolving only a small portion of the iron content of the high magnesium ore fraction. Further neutralization of the leach slurry in the presence of an alkali metal or ammonium ion will allow the precipitation of iron-bearing jarosite at ambient pressure. This process for incorporating the leaching of saprolite in the high pressure leaching process for limonite ores requires neither high temperature and pressure, nor special treatment of the saprolite ore fraction, nor the addition of special reagents, e.g. reducing reagents.