GB2291870A - Recovering nickel from a nickel sulphide concentrate - Google Patents
Recovering nickel from a nickel sulphide concentrate Download PDFInfo
- Publication number
- GB2291870A GB2291870A GB9515003A GB9515003A GB2291870A GB 2291870 A GB2291870 A GB 2291870A GB 9515003 A GB9515003 A GB 9515003A GB 9515003 A GB9515003 A GB 9515003A GB 2291870 A GB2291870 A GB 2291870A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nickel
- concentrate
- carried out
- solution
- leaching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 33
- 239000012141 concentrate Substances 0.000 title claims abstract description 18
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 38
- 238000002386 leaching Methods 0.000 claims abstract description 14
- 229910000863 Ferronickel Inorganic materials 0.000 claims abstract description 11
- 238000005342 ion exchange Methods 0.000 claims abstract description 10
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000005569 Iron sulphate Substances 0.000 claims abstract description 4
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 14
- 230000003647 oxidation Effects 0.000 claims description 10
- 238000007254 oxidation reaction Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 238000005363 electrowinning Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 8
- 229910021653 sulphate ion Inorganic materials 0.000 claims description 8
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 claims description 7
- 238000010828 elution Methods 0.000 claims description 5
- 239000003153 chemical reaction reagent Substances 0.000 claims description 4
- 238000000638 solvent extraction Methods 0.000 claims description 4
- 241000605272 Acidithiobacillus thiooxidans Species 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 241000589921 Leptospirillum ferrooxidans Species 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 3
- 235000011149 sulphuric acid Nutrition 0.000 claims description 3
- 239000001117 sulphuric acid Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 7
- 239000011707 mineral Substances 0.000 description 7
- 235000010755 mineral Nutrition 0.000 description 7
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 229910052952 pyrrhotite Inorganic materials 0.000 description 4
- 239000003456 ion exchange resin Substances 0.000 description 3
- 229920003303 ion-exchange polymer Polymers 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 229920001429 chelating resin Polymers 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
- 238000009291 froth flotation Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052953 millerite Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052954 pentlandite Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/18—Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
A process for producing ferronickel wherein a solution of nickel sulphate and iron sulphate is produced by leaching a nickel sulphide concentrate. The solution is subjected to an ion exchange step whereafter ferronickel is electrowon from an eluate solution of nickel. <IMAGE>
Description
NICKEL RECOVERY
This invention relates to the recovery of nickel from sulphide ores.
Nickel metal has been recovered from nickel sulphide bearing ore bodies by conventional procedures wherein the ore is ground fine and the nickel sulphide minerals are concentrated by froth flotation to produce a nickel sulphide concentrate. The nickel sulphide minerals may be present as pentlandite, pyrrhotite, millerite or other sulphide minerals.
The concentrate is treated further by smelting and reduction to produce a nickel bearing matte which contains nickel, cobalt, copper and iron.
Various techniques are known for refining the matte to produce pure metal. These include leaching, pressure leaching, hydrogen reduction, electrowinning, the Carbonyl process, and so on. In general the refining processes are expensive and produce nickel metal to varying degrees of purity, roughly dependent on the cost of the process employed.
Nickel metal has many applications but its use in stainless steel is becoming more dominant. For stainless steel, nickel metal does not need to be as pure as for other applications and it can be used as ferronickel.
Ferronickel is produced from ores of nickel other than sulphide ores. If however it is possible to produce ferronickel from sulphide ores then, when nickel for stainless steel is not required in a pure state, it Is possible to avoid refining to produce pure nickel.
The invention is concerned with a process to produce impure nickel in the form of ferronickel when the starting material is a concentrate of nickel sulphide minerals.
The invention provides a method of producing nickel from a nickel sulphide concentrate wherein the concentrate, in slurry form, is leached in one or more tanks, a solution of nickel sulphate and iron sulphate, produced by the leaching, is treated with a solvent extraction or ion exchange reagent which is selective for nickel over ferrous iron whereby the nickel is separated from the iron and transferred in a concentrated form into an eluate solution, and the eluate solution is subjected to an electrowinning process to produce ferronickel.
The leaching process may include the following: treating the concentrate with a solution of ferric sulphate, separating the product thereof into solid and liquid components, directing the liquid component to treatment with the said solvent extraction or ion exchange reagent, subjecting the solid component to a biological oxidation process, separating the product thereof into solid and liquid components, and contacting the liquid component with fresh concentrate.
The biological oxidation process may be carried out using Thiobacillus ferrooxidans.
Preferably a mixture of Thiobacillus ferrooxidans, Thiobacillus thiooxidans and Leptospirillum ferrooxidans is used In the oxidation step.
The Thiobacillus ferrooxidans preferably mainly consists of the strain TF
FC-1 as described in the specification of Australian patent No. 618177.
This strain forms the subject of a deposit under Accession No. N 90/010723 at the Australian Government Analytical Laboratories.
The invention is further described by way of example with reference to the accompanying drawing which illustrates in block form a flow diagram of the process of the invention.
The accompanying drawing illustrates the process of the invention applied to the production of ferronickel from a starting material which is a concentrate of nickel sulphide minerals.
The process includes the following main process steps: a leaching phase 10, which is carried out in one or more tanks, an ion exchange step 12, an electrowinning stage 14, liquid/solid separation stages 16 and 18 respectively, and a biological oxidation process 20.
Nickel concentrate 8 Is produced by finely grinding a suitable sulphide ore and then concentrating the nickel sulphide minerals by froth flotation. The nickel concentrate contains a high proportion of the mineral pyrrhotite. It has been found that pyrrhotite reacts very quickly with ferric sulphate, in the leaching step 10. The leaching step is carried out for any suitable period of time, but typically for from 12 to 24 hours. Iron is reduced to ferrous sulphate and pyrrhotite is dissolved, according to the reaction:
Fe7S8 + 7Fe2(SO4)3 - 21 FeSO4 + 8S
The product of the leaching step is separated, at the stage 16, into a liquid component 22 and a solid component 24.
The solid component is subjected to bacterial oxidation 20 using one or more of Thiobacillus ferrooxidans, Thiobacillus thiooxidans and
Leptospirillum ferroxidans. The Thiobacillus ferrooxidans is mainly constituted by the strain TF-FC-1 as defined in the specification of
Australian patent No. 618 177, and forming the subject of a deposit made at the Australian Government Analytical Laboratories under Accession No.
N 90/010723.
These bacteria are similar to those used in processes applied to refractory gold ores where iron, nickel and sulphur dissolve to form nickel sulphate and Iron sulphate in solution.
The product of the biological oxidation is separated, at 18, Into a residue solid component 26 and a liquid component 28.
The liquid component 28 has a large excess of ferric sulphate in solution.
The solution is contacted with fresh concentrate 8.
The liquid component 22 produced in the separation stage 16 is directed to the ion exchange step 12. Nickel is absorbed from solution by an ion exchange resin which is selective for nickel. There are several ion exchange resins which can be used for this process which are marketed under the general grouping of chelating resins. These resins are selective for nickel relative to ferrous iron but not ferric iron. In the bacterial oxidation process however, as has been described, much of the ferric sulphate in solution is reduced to ferrous sulphate. The problem associated with ferric sulphate is thus largely eliminated and the chelating resins are effective in separating the nickel from the iron in solution and allowing the nickel to be transferred in a concentrated form into an eluate solution 30.
The solution 30 is subjected to a known electrowinning process 14 to produce an alloy 32 of nickel and iron. The solution, marked 34, remaining after electrowinning still contains nickel and is reused to elute further nickel from the ion exchange resin. Sulphuric acid is generated by electrowinning and is thus used, although additional sulphuric acid may still be required, for resin elution. The additional acid is added, as required.
It is to be noted that it may be necessary to remove at least some of the remaining ferric sulphate from the liquid component 22 by precipitation of the iron with an alkali such as lime. It is however not necessary to remove all of the ferric iron from solution because the ion exchange electrowinning processes will produce ferronickel, which is acceptable.
As the leaching step 10 is carried out in one or more tanks it is possible to control the leaching process precisely to produce an acceptable concentration of ferric sulphate.
The biological oxidation step 20 is carried out under conditions described in the specification of Australian patent No. 618 177 where the optimum conditions of pH and temperature are described.
The ion exchange step 12 may be carried out in any of the commercially available systems. It has been found to be advantageous to use a countercurrent fluldised bed column fitted with multiple stages separated by plates because stage-wise adsorption provides a more efficient process for achieving separation of nickel and iron while removing at least 99% nickel from solution.
The elution process is also carried out countercurrently so that a highly concentrated eluate Is obtained, while efficient elution of the resin is achieved.
Claims (9)
1. A method of producing nickel from a nickel sulphide concentrate wherein the concentrate, in slurry form, is leached in one or more tanks, a solution of nickel sulphate and iron sulphate, produced by the leaching, is treated with a solvent extraction or ion exchange reagent which is selective for nickel over ferrous Iron whereby the nickel is separated from the iron and transferred in a concentrated form into an eluate solution, and the eluate solution is subjected to an electrowinning process to produce ferronickel.
2. A method according to claim 1 wherein the leaching is carried out by treating the concentrate with a solution of ferric sulphate, separating the product thereof into solid and liquid components, directing the liquid component to treatment with the said solvent extraction or ion exchange reagent, subjecting the solid component to a biological oxidation process, separating the product thereof into solid and liquid components, and contacting the liquid component with fresh concentrate.
3. A method according to claim 2 wherein the biological oxidation process is carried out using one or more of Thiobacillus ferrooxidans, Thiobacillus thiooxidans and Leptospirillum ferrooxidans.
4. A method according to claim 3 wherein the Thiobacillus ferrooxidans consists of the strain TF-FC-1.
5. A method according to any one of claims 1 to 4 wherein the leaching is carried out for a period of from 12 to 24 hours.
6. - A method according to any of claims 1 to 5 wherein sulphuric acid, generated in the electrowinning process, is used in the elution step.
7. A method according to any one of claims 1 to 6 wherein the ion exchange step is carried out using a multiple stage countercurrent fluidised bed column.
8. A method according to any one of claims 1 to 7 wherein the elution step is carried out countercurrently.
9. A method of producing ferronickel from a nickel sulphide concentrate substantially as hereinbefore described with reference to the accompanying flow diagram.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA945686 | 1994-08-01 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9515003D0 GB9515003D0 (en) | 1995-09-20 |
| GB2291870A true GB2291870A (en) | 1996-02-07 |
| GB2291870B GB2291870B (en) | 1998-05-27 |
Family
ID=25584183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9515003A Expired - Fee Related GB2291870B (en) | 1994-08-01 | 1995-07-21 | Nickel recovery |
Country Status (5)
| Country | Link |
|---|---|
| AU (1) | AU689598B2 (en) |
| CA (1) | CA2155051C (en) |
| FI (1) | FI108047B (en) |
| GB (1) | GB2291870B (en) |
| ZA (1) | ZA956204B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2744732A1 (en) * | 1996-02-13 | 1997-08-14 | Rech Geol Et Minieres Brgm Bur | High yield biological extraction of cobalt from mineral ores |
| EP0948655A1 (en) * | 1995-07-17 | 1999-10-13 | Bhp Minerals International Inc. | Recovery of nickel from bioleach solution |
| WO2001018268A1 (en) * | 1999-09-07 | 2001-03-15 | Billiton Intellectual Property B.V. | Recovery of nickel from nickel bearing sulphide minerals by bioleaching |
| WO2001029276A1 (en) * | 1999-10-15 | 2001-04-26 | Bhp Minerals International, Inc. | Resin-in-pulp method for recovery of nickel and cobalt from oxidic ore leach slurry |
| WO2008128278A2 (en) * | 2007-04-19 | 2008-10-30 | Metallica Minerals Ltd | Treatment of nickel-containing solutions |
| US7585350B2 (en) * | 2005-02-24 | 2009-09-08 | Bhp Billiton Ssm Technology Pty Ltd. | Production of ferronickel |
| US7597738B2 (en) * | 2004-09-17 | 2009-10-06 | Bhp Billiton Ssm Technology Pty Ltd. | Production of ferro-nickel or nickel matte by a combined hydrometallurgical and pyrometallurgical process |
| US7901484B2 (en) | 2007-08-28 | 2011-03-08 | Vale Inco Limited | Resin-in-leach process to recover nickel and/or cobalt in ore leaching pulps |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU770734B2 (en) * | 1999-09-22 | 2004-03-04 | Billiton S.A. Limited | Copper and nickel recovery |
| MX349844B (en) | 2012-07-16 | 2017-08-16 | Tam 5 S L * | Hydrometallurgical method for recovering zinc in a sulphuric medium from zinc sulphide concentrates having a high iron content. |
| CN105887136B (en) * | 2016-04-23 | 2018-04-03 | 上海大学 | A kind of method that iron and nickel are separated in the pickle liquor from lateritic nickel ore |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5397380A (en) * | 1991-06-19 | 1995-03-14 | Boliden Mineral Ab | Method for processing complex metal sulphide materials |
-
1995
- 1995-07-19 FI FI953487A patent/FI108047B/en active
- 1995-07-21 GB GB9515003A patent/GB2291870B/en not_active Expired - Fee Related
- 1995-07-26 ZA ZA956204A patent/ZA956204B/en unknown
- 1995-07-28 AU AU27262/95A patent/AU689598B2/en not_active Ceased
- 1995-07-31 CA CA002155051A patent/CA2155051C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5397380A (en) * | 1991-06-19 | 1995-03-14 | Boliden Mineral Ab | Method for processing complex metal sulphide materials |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0948655A1 (en) * | 1995-07-17 | 1999-10-13 | Bhp Minerals International Inc. | Recovery of nickel from bioleach solution |
| EP0948655A4 (en) * | 1995-07-17 | 2000-03-01 | Bhp Minerals Int Inc | Recovery of nickel from bioleach solution |
| FR2744732A1 (en) * | 1996-02-13 | 1997-08-14 | Rech Geol Et Minieres Brgm Bur | High yield biological extraction of cobalt from mineral ores |
| WO2001018268A1 (en) * | 1999-09-07 | 2001-03-15 | Billiton Intellectual Property B.V. | Recovery of nickel from nickel bearing sulphide minerals by bioleaching |
| US6733567B1 (en) | 1999-09-07 | 2004-05-11 | Billiton Intellectual Property, B.V. | Recovery of nickel from nickel bearing sulphide minerals by bioleaching |
| WO2001029276A1 (en) * | 1999-10-15 | 2001-04-26 | Bhp Minerals International, Inc. | Resin-in-pulp method for recovery of nickel and cobalt from oxidic ore leach slurry |
| US6350420B1 (en) | 1999-10-15 | 2002-02-26 | Bhp Minerals International, Inc. | Resin-in-pulp method for recovery of nickel and cobalt |
| US7597738B2 (en) * | 2004-09-17 | 2009-10-06 | Bhp Billiton Ssm Technology Pty Ltd. | Production of ferro-nickel or nickel matte by a combined hydrometallurgical and pyrometallurgical process |
| US7585350B2 (en) * | 2005-02-24 | 2009-09-08 | Bhp Billiton Ssm Technology Pty Ltd. | Production of ferronickel |
| WO2008128278A2 (en) * | 2007-04-19 | 2008-10-30 | Metallica Minerals Ltd | Treatment of nickel-containing solutions |
| WO2008128278A3 (en) * | 2007-04-19 | 2008-12-18 | Metallica Minerals Ltd | Treatment of nickel-containing solutions |
| US7901484B2 (en) | 2007-08-28 | 2011-03-08 | Vale Inco Limited | Resin-in-leach process to recover nickel and/or cobalt in ore leaching pulps |
Also Published As
| Publication number | Publication date |
|---|---|
| FI953487A (en) | 1996-02-02 |
| GB2291870B (en) | 1998-05-27 |
| CA2155051A1 (en) | 1996-02-02 |
| AU2726295A (en) | 1996-02-15 |
| GB9515003D0 (en) | 1995-09-20 |
| ZA956204B (en) | 1996-03-12 |
| AU689598B2 (en) | 1998-04-02 |
| FI953487A0 (en) | 1995-07-19 |
| CA2155051C (en) | 2002-02-05 |
| FI108047B (en) | 2001-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20010721 |