WO1991011539A1 - Procede de separation - Google Patents
Procede de separation Download PDFInfo
- Publication number
- WO1991011539A1 WO1991011539A1 PCT/GB1991/000114 GB9100114W WO9111539A1 WO 1991011539 A1 WO1991011539 A1 WO 1991011539A1 GB 9100114 W GB9100114 W GB 9100114W WO 9111539 A1 WO9111539 A1 WO 9111539A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gold
- solution
- thiosulphate
- process according
- adsorbent
- Prior art date
Links
- 238000000926 separation method Methods 0.000 title description 2
- 239000010931 gold Substances 0.000 claims abstract description 113
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 112
- 229910052737 gold Inorganic materials 0.000 claims abstract description 112
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims abstract description 43
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 42
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 34
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 claims abstract description 31
- 239000003463 adsorbent Substances 0.000 claims abstract description 25
- 238000011084 recovery Methods 0.000 claims abstract description 23
- 239000011347 resin Substances 0.000 claims abstract description 3
- 229920005989 resin Polymers 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 57
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 21
- 229910052709 silver Inorganic materials 0.000 claims description 21
- 239000004332 silver Substances 0.000 claims description 21
- -1 thiosulphate anion Chemical class 0.000 claims description 15
- 239000012527 feed solution Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- 239000011701 zinc Substances 0.000 claims description 7
- IZLAVFWQHMDDGK-UHFFFAOYSA-N gold(1+);cyanide Chemical compound [Au+].N#[C-] IZLAVFWQHMDDGK-UHFFFAOYSA-N 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000012670 alkaline solution Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000011068 loading method Methods 0.000 description 11
- 150000002500 ions Chemical class 0.000 description 9
- 239000010970 precious metal Substances 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- XYXNTHIYBIDHGM-UHFFFAOYSA-N ammonium thiosulfate Chemical compound [NH4+].[NH4+].[O-]S([O-])(=O)=S XYXNTHIYBIDHGM-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- ADPOBOOHCUVXGO-UHFFFAOYSA-H dioxido-oxo-sulfanylidene-$l^{6}-sulfane;gold(3+) Chemical compound [Au+3].[Au+3].[O-]S([O-])(=O)=S.[O-]S([O-])(=O)=S.[O-]S([O-])(=O)=S ADPOBOOHCUVXGO-UHFFFAOYSA-H 0.000 description 4
- 238000002386 leaching Methods 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 3
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 239000001166 ammonium sulphate Substances 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 235000010269 sulphur dioxide Nutrition 0.000 description 2
- 239000004291 sulphur dioxide Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-M Thiocyanate anion Chemical compound [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 1
- RRKGBEPNZRCDAP-UHFFFAOYSA-N [C].[Ag] Chemical compound [C].[Ag] RRKGBEPNZRCDAP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 239000003957 anion exchange resin Substances 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000010960 commercial process Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011005 laboratory method Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 238000012360 testing method 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
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
-
- 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
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/42—Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
-
- 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
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
- C22B3/24—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
-
- 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
Definitions
- the present invention relates to the recovery of metals from solution and more particularly relates to the recovery of gold from leach solutions.
- gold or precious metals it is common for gold or precious metals to be separated from their ores by treatment with cyanide solutions, the metal forming a soluble complex with the cyanide and being subsequently extracted from solution.
- certain gold-bearing ores referred to generally as refractory ores
- refractory ores are not amenable to cyanidation and include pyritic and arsenopyritic ores.
- a number of cyanide extraction processes for extracting gold from refractory ores are known. These are directed towards the breakdown of the sulphur matrix and the removal of the gold in a solubilised form from which it may subsequently be retrieved. Such techniques include roasting of the ground ore followed by cyanidation or acid pressure leaching with sulphuric acid and oxygen at about 200°C followed by cyanidation of the neutralised residue.
- a further alternative for recovery of precious metals, such as gold, from their ores involves treatment of the ore with a thiosulphate solution.
- US-A- 4070182 teaches a process for the recovery of gold from copper bearing sulphidic material containing gold.
- the copper bearing sulphidic material is subjected to a main leach under oxidising conditions to provide a copper containing main leach liquor and a main residue.
- This residue, or the copper bearing sulphidic material before the main leach is subjected to a secondary leach with ammonium thiosulphate solution to provide a gold containing secondary leach liquor and a secondary residue.
- Cementation with zinc is said to provide a commercially useful and effective method of precipitating the precious metals from solution, preferably after first reducing cupric ions in the solution to cuprous ions, for example by reaction with sulphur dioxide.
- column 1 lines 38 to 68 of US-A- 4269622 problems arise due to the instability of the thiosulphate ion in this process.
- US-A-4269622 teaches a process for recovery of precious metals such as gold and silver from ores that are difficult to treat, particularly those containing manganese, by lixiviating using an ammonium thiosulphate leach solution containing copper, sufficient ammonia to maintain a pH of at least 7.5, and at least 0.05% sulphite ion.
- Proposed methods of recovery of the precious metals from the leach solution are use of metallic zinc, iron or copper, of electrolysis or of addition of soluble sulphides to recover a sulphide precipitate. It is said that, with the use of such a leach liquor good recoveries are achieved in less time compared with the prior art use of cyanide, and without the possibility of contamination of streams and surroundings.
- a development of the process is described in US-A-4369061 wherein the sulphite ion concentration is maintained at at least 0.05% by generation in situ by the addition of sulphur dioxide, and generating thiosulphate in situ as needed by the addition of elemental sulphur to the system.
- US-A-4778519 has disclosed a method for recovery of gold and silver from precious metal bearing materials, including ores, with a thiourea solution to form a thiourea leach which is then contacted with carbon to absorb the gold and silver and provide loaded carbon.
- the precious metals are then separated from the carbon by contacting the loaded carbon, with thiosulphate ions.
- the present invention seeks to provide an improved process for the recovery of gold from thiosulphate containing solutions, for example those obtained from leaching of refractory ores.
- a process for the recovery of gold from gold-loaded thiosulphate solution comprising the steps of (a) adding to the solution at least a stoichiometric amount of cyanide ions (relative to gold) (b) adsorbing the resultant gold cyanide complex on an adsorbent and (c) separating the adsorbed gold from the adsorbent.
- the concentration of gold in a typical thiosulphate leach liquor may be measured in terms of a few mg per litre of liquor. Hence very low concentrations of gold are normally present in the leach liquor. Moreover, since silver is often present in a gold bearing ore, the leach liquor may contain significant quantities of silver, often in excess of the amount of gold present. Cementation with zinc will normally result in co- precipitation of gold and silver so that subsequent processing steps are required to separate gold from silver.
- Carbon is not an effective adsorbent for gold from a typical gold-containing thiosulphate leach liquor, we have found in the course of our experiments.
- the reaction of cyanide ions with the gold-thiosulphate complex ion proceeds essentially to completion, even though only a stoichiometric or near stoichiometric amount of cyanide is used.
- the resulting gold cyanide complex can be efficiently adsorbed from the leach liquor on carbon and subsequently stripped therefrom so that the process of the invention results in very high recovery of gold from the thiosulphate leach liquor. Since only a stoichiometric or near stoichiometric amount of cyanide is added to the leach liquor, the concentration of free cyanide ions in the barren leach liquid resulting after contact with the adsorbent is low and is typically equivalent to only a few mg per litre. Hence the danger of environmental damage by use of cyanide ions is correspondingly low.
- Another advantage of the process of the present invention is that the recovery of gold is selective; if the leach liquor also contains other dissolved metals, such as silver, then the selectivity of recovery of gold, compared to silver, is extremely high, even though silver can also form complex metal cyanide ions which are also capable of being adsorption upon an adsorbent, such as carbon.
- the recovery of gold present in the thiosulphate leach liquor was greater than 95%, typically at least about 97% under favourable circumstances, using the process of the invention, whilst less than 1% of the silver present in the thiosulphate leach liquor, typically not more than about 0.5% thereof, is recovered in the stripping step.
- the gold-loaded thiosulphate solution may be obtained by treatment of a gold-bearing material, such as an ore, with a thiosulphate solution. Alternatively it can be obtained by the treatment of an oxidised residue of a refractory ore, such as a pyritic ore or an arsenopyritic ore, with a thiosulphate solution.
- Another way of producing a gold-loaded thiosulphate solution involves treating a refractory ore, such as a pyritic ore or an arsenopyritic ore, with oxygen and an alkaline solution as taught, for example, by EP-A-0316094; in this case the thiosulphate ions may be generated in situ.
- the adsorbent may be any adsorbent that will adsorb a gold cyanide complex from a solution thereof.
- Typical adsorbents include carbon, preferably activated carbon, or a resin, such as an anion exchange resin.
- the adsorbed gold may be separated from the adsorbent, e.g. carbon, by a stripping process such as the Zadra stripping process. Stripping of the loaded carbon with a stripping liquid, such as water, dilute caustic or dilute caustic cyanide, at temperatures above 130°C can be used as described in US-A-3920403.
- a stripping liquid such as water, dilute caustic or dilute caustic cyanide
- cyanide ions may be added in an amount corresponding to from 1 to about 400 times the cyanide:gold stoichiometric ratio.
- the amount of cyanide ions added corresponds to no more than about 25 times, e.g. less than 10 times, the cyanide:gold stoichiometric ratio.
- the amount of cyanide ions added correspond to no more than about twice, e.g. 1.5 times or less, the cyanide:gold stoichiometric ratio.
- the cyanide ions may be added in any convenient form, for example as an alkali metal cyanide, such as sodium or potassium cyanide.
- the gold-loaded thiosulphate solution may contain up to about 6% w/v Na2 ⁇ 2 ⁇ 3, typically from about 0.1% w/v up to about 6% w/v, for example from about 1% w/v to about 6% w/v Na2S2 ⁇ 3 « It may further contain one or more of the following components, viz. : (a) up to about 25% w/v Na 2 S0 4 , e.g. from about 0.1% w/v up to about 25% w/v, typically at least about 1% w/v, for example from about 15% w/v to 25% w/v Na 2 S0 4 ; and/or
- the gold in the gold-loaded thiosulphate solution is present as the gold thiosulphate complex anion, typically at a concentration of from about 1 to about 10 mg/1, calculated as gold metal.
- silver also forms complex ions by reaction with cyanide ions.
- Other metals which can form complex ions with cyanide and may be present in gold ores and other gold-bearing materials used for the production of the starting gold-loaded thiosulphate solution include copper and zinc. It is an advantage of the process of the invention that it permits the selective recovery of gold from solutions containing silver and other metals that form complex ions with cyanide.
- the invention further provides a process for the selective recovery of gold from a thiosulphate-containing feed solution containing at least one further metal selected from silver, copper, zinc and mixtures thereof, comprising the steps of:
- the adsorbent may adsorb at least about 90% of the gold present in the gold-loaded solution, up to about 95% or more thereof (e.g. about 97% or more), whilst adsorbing no more than about 10%, and preferably not more than about 5% (even more preferably not more than about 1% or less), of any other dissolved metal, such as silver, copper or zinc, that can form complex anions by reaction with cyanide ions. In this way the subsequent refining of the recovered gold is correspondingly facilitated.
- Feed solution 0.95 mg of gold in the form of the thiosulphate anion/litre Barren solution 0.06 mg of gold in the form of the thiosulphate anion/litre Gold loading on carbon 90 g/t (94% recovery)
- a leach solution was prepared by leaching a gold and silver containing solid with an a moniacal thiosulphate solution comprising 18% ammonium thiosulphate, 3% ammonium sulphate, 2% ammonia and 4 g/1 of cupric ion.
- the leach was carried out for 2 hours at 50°C.
- the pregnant solution was found to contain 58 mg/1 of gold and 110 mg/1 of silver.
- 500 mis of this solution was stirred with 5 g carbon and 40 mg cyanide ion for 17 h at 25°C.
- the carbon analysis and the barren solution concentration were then used to calculate gold loading.
- the analysis was as follows:
- the conditions used are for a standard laboratory technique for stripping gold from carbon (Zadra strip), the observed stripping efficiency of 96% being good in view of the unoptimised process.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Le procédé décrit, qui sert à récupérer l'or contenu dans une solution de thiosulfate chargée d'or, consiste à traiter la solution avec au moins une quantité st÷chiométrique d'ions de cyanure et adsorber le complexe d'or qui en résulte au moyen d'un adsorbant, tel que du carbone ou une résine. L'adsorbant chargé d'or est ensuite soumis à une rectification qui permet de récupérer l'or adsorbé. Ce procédé se révèle très efficace pour séparer l'or de solutions de thiosulfate qui sont normalement difficiles à traiter.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB909002311A GB9002311D0 (en) | 1990-02-02 | 1990-02-02 | Separation process |
GB9002311.0 | 1990-02-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991011539A1 true WO1991011539A1 (fr) | 1991-08-08 |
Family
ID=10670290
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1991/000114 WO1991011539A1 (fr) | 1990-02-02 | 1991-01-28 | Procede de separation |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU647074B2 (fr) |
GB (1) | GB9002311D0 (fr) |
WO (1) | WO1991011539A1 (fr) |
ZA (1) | ZA91770B (fr) |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5354359A (en) * | 1992-04-01 | 1994-10-11 | Newmont Gold Co. | Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant |
US5536297A (en) * | 1995-02-10 | 1996-07-16 | Barrick Gold Corporation | Gold recovery from refractory carbonaceous ores by pressure oxidation and thiosulfate leaching |
US5785736A (en) * | 1995-02-10 | 1998-07-28 | Barrick Gold Corporation | Gold recovery from refractory carbonaceous ores by pressure oxidation, thiosulfate leaching and resin-in-pulp adsorption |
US5876588A (en) * | 1996-12-18 | 1999-03-02 | Ug Plus International Inc. | Process for removing and recovering copper, silver and zinc from sulfide ores |
US5939034A (en) * | 1996-06-26 | 1999-08-17 | Henkel Corporation | Process for the recovery of precious metal values from aqueous ammoniacal thiosulfate leach solutions |
WO1999050465A1 (fr) * | 1998-03-27 | 1999-10-07 | Golden Kingdom (No.2) Pty Limited | Procede d'extraction de metaux precieux et de cuivre dans des minerais de cuivre/d'or a l'aide de techniques utilisant des resines |
WO2000065112A1 (fr) * | 1999-04-26 | 2000-11-02 | Cognis Corporation | Recuperation de valeurs metalliques precieuses a partir de solutions de lessivage de thiosulfate ammoniacal aqueux |
US6251163B1 (en) | 1998-03-04 | 2001-06-26 | Placer Dome, Inc. | Method for recovering gold from refractory carbonaceous ores |
US6368381B1 (en) | 1998-03-11 | 2002-04-09 | Placer Dome Technical Services, Ltd. | Autoclave using agitator and sparge tube to provide high oxygen transfer rate to metal-containing solutions |
US6632264B2 (en) | 2001-04-17 | 2003-10-14 | The University Of British Columbia | Gold recovery from thiosulfate leaching |
US6660059B2 (en) | 2000-05-19 | 2003-12-09 | Placer Dome Technical Services Limited | Method for thiosulfate leaching of precious metal-containing materials |
US7285256B2 (en) | 2003-04-04 | 2007-10-23 | Newmont Usa Limited | Precious metal recovery using thiocyanate lixiviant |
US7544232B2 (en) | 2002-11-15 | 2009-06-09 | Placer Dome Technical Services Ltd. | Method for thiosulfate leaching of precious metal-containing materials |
RU2363746C1 (ru) * | 2008-03-17 | 2009-08-10 | Федеральное государственное образовательное учреждение высшего профессионального образования "Сибирский федеральный университет" | Способ селективного извлечения золота из водных тиоцианатных растворов |
US7572317B2 (en) | 2005-11-10 | 2009-08-11 | Barrick Gold Corporation | Thiosulfate generation in situ in precious metal recovery |
US7604783B2 (en) | 2004-12-22 | 2009-10-20 | Placer Dome Technical Services Limited | Reduction of lime consumption when treating refractor gold ores or concentrates |
RU2385958C1 (ru) * | 2008-09-24 | 2010-04-10 | Институт химии Дальневосточного отделения Российской академии наук (статус государственного учреждения) (Институт химии ДВО РАН) | Способ раздельного извлечения золота и серебра из тиоцианатных растворов |
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US9051625B2 (en) | 2011-06-15 | 2015-06-09 | Barrick Gold Corporation | Method for recovering precious metals and copper from leach solutions |
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US10415116B2 (en) | 2010-12-07 | 2019-09-17 | Barrick Gold Corporation | Co-current and counter current resin-in-leach in gold leaching processes |
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US11639540B2 (en) | 2019-01-21 | 2023-05-02 | Barrick Gold Corporation | Method for carbon-catalysed thiosulfate leaching of gold-bearing materials |
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US5354359A (en) * | 1992-04-01 | 1994-10-11 | Newmont Gold Co. | Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant |
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US6197214B1 (en) | 1996-06-26 | 2001-03-06 | Henkel Corporation | Ammonium thiosulfate complex of gold or silver and an amine |
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US6251163B1 (en) | 1998-03-04 | 2001-06-26 | Placer Dome, Inc. | Method for recovering gold from refractory carbonaceous ores |
US6368381B1 (en) | 1998-03-11 | 2002-04-09 | Placer Dome Technical Services, Ltd. | Autoclave using agitator and sparge tube to provide high oxygen transfer rate to metal-containing solutions |
WO1999050465A1 (fr) * | 1998-03-27 | 1999-10-07 | Golden Kingdom (No.2) Pty Limited | Procede d'extraction de metaux precieux et de cuivre dans des minerais de cuivre/d'or a l'aide de techniques utilisant des resines |
WO2000065112A1 (fr) * | 1999-04-26 | 2000-11-02 | Cognis Corporation | Recuperation de valeurs metalliques precieuses a partir de solutions de lessivage de thiosulfate ammoniacal aqueux |
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US6632264B2 (en) | 2001-04-17 | 2003-10-14 | The University Of British Columbia | Gold recovery from thiosulfate leaching |
US7544232B2 (en) | 2002-11-15 | 2009-06-09 | Placer Dome Technical Services Ltd. | Method for thiosulfate leaching of precious metal-containing materials |
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US7604783B2 (en) | 2004-12-22 | 2009-10-20 | Placer Dome Technical Services Limited | Reduction of lime consumption when treating refractor gold ores or concentrates |
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Also Published As
Publication number | Publication date |
---|---|
GB9002311D0 (en) | 1990-04-04 |
AU647074B2 (en) | 1994-03-17 |
ZA91770B (en) | 1992-01-29 |
AU7072591A (en) | 1991-08-21 |
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