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WO1991011539A1 - Procede de separation - Google Patents

Procede de separation Download PDF

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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
Application number
PCT/GB1991/000114
Other languages
English (en)
Inventor
Jonathan Paul Lulham
Derek Lindsay
Original Assignee
Davy Mckee (Stockton) Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Davy Mckee (Stockton) Limited filed Critical Davy Mckee (Stockton) Limited
Publication of WO1991011539A1 publication Critical patent/WO1991011539A1/fr

Links

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.
PCT/GB1991/000114 1990-02-02 1991-01-28 Procede de separation WO1991011539A1 (fr)

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

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PCT/GB1991/000114 WO1991011539A1 (fr) 1990-02-02 1991-01-28 Procede de separation

Country Status (4)

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AU (1) AU647074B2 (fr)
GB (1) GB9002311D0 (fr)
WO (1) WO1991011539A1 (fr)
ZA (1) ZA91770B (fr)

Cited By (25)

* Cited by examiner, † Cited by third party
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
RU2472863C2 (ru) * 2010-10-07 2013-01-20 Учреждение Российской академии наук Физический институт им. П.Н. Лебедева РАН (ФИАН) Универсальный способ селективного извлечения солей переходных, редкоземельных и актиноидных элементов из многокомпонентных растворов с помощью нанопористых материалов
US9051625B2 (en) 2011-06-15 2015-06-09 Barrick Gold Corporation Method for recovering precious metals and copper from leach solutions
US9827547B2 (en) 2013-08-15 2017-11-28 Hatch Ltd. Multi-compartment reactor and method for controlling retention time in a multi-compartment reactor
US10161016B2 (en) 2013-05-29 2018-12-25 Barrick Gold Corporation Method for pre-treatment of gold-bearing oxide ores
US10415116B2 (en) 2010-12-07 2019-09-17 Barrick Gold Corporation Co-current and counter current resin-in-leach in gold leaching processes
CN110921811A (zh) * 2019-11-29 2020-03-27 南京华创环境技术研究院有限公司 一种改性火山岩填料及其制备方法和应用
CN115612857A (zh) * 2022-10-25 2023-01-17 昆明理工大学 一种选择性回收废旧电路板浸出液中金(iii)的方法
US11639540B2 (en) 2019-01-21 2023-05-02 Barrick Gold Corporation Method for carbon-catalysed thiosulfate leaching of gold-bearing materials

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111979427A (zh) * 2020-08-27 2020-11-24 河南理工大学 一种回收硫代硫酸盐浸金溶液中金离子的方法

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US3920403A (en) * 1974-02-01 1975-11-18 Us Interior Method of desorbing gold from activated carbon
US4070182A (en) * 1976-02-20 1978-01-24 Sherritt Gordon Mines Limited Recovery of precious metals from metal sulphides
US4269622A (en) * 1979-12-28 1981-05-26 Kerley Jr Bernard J Recovery of precious metals from difficult ores
US4369061A (en) * 1979-12-28 1983-01-18 Kerley Jr Bernard J Recovery of precious metals from difficult ores
EP0177291A2 (fr) * 1984-09-27 1986-04-09 Sherritt Gordon Limited Procédé de récupération de l'or à partir des minerais réfractaires sulfurés contenant de l'or et du fer
US4654079A (en) * 1984-03-13 1987-03-31 Nunez, Roca, Espiell, Universidad de Barcelona Process for improving the extraction yield of silver and gold in refractory ores

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920403A (en) * 1974-02-01 1975-11-18 Us Interior Method of desorbing gold from activated carbon
US4070182A (en) * 1976-02-20 1978-01-24 Sherritt Gordon Mines Limited Recovery of precious metals from metal sulphides
US4269622A (en) * 1979-12-28 1981-05-26 Kerley Jr Bernard J Recovery of precious metals from difficult ores
US4369061A (en) * 1979-12-28 1983-01-18 Kerley Jr Bernard J Recovery of precious metals from difficult ores
US4654079A (en) * 1984-03-13 1987-03-31 Nunez, Roca, Espiell, Universidad de Barcelona Process for improving the extraction yield of silver and gold in refractory ores
EP0177291A2 (fr) * 1984-09-27 1986-04-09 Sherritt Gordon Limited Procédé de récupération de l'or à partir des minerais réfractaires sulfurés contenant de l'or et du fer

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* Cited by examiner, † Cited by third party
Title
Hydrometallurgy, vol. 19, no. 3, January 1988, Elsevier Science Publishers B.V., (Amsterdam, NL), D. Zipperian et al.: "Gold and silver extraction by ammoniacal thiosulfate leaching from a rhyolite ore", pages 361-375 *
Reactive Polymers, vol. 9, no. 3 + index, December 1988, Elsevier Science Publishers B.V., (Amsterdam, NL), J.H. Hodgkin et al.: "Gold extraction with poly(diallylamine) resins", pages 285-291 *

Cited By (38)

* Cited by examiner, † Cited by third party
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
AU685755B2 (en) * 1993-07-28 1998-01-29 Newmont Usa Limited 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
US6197214B1 (en) 1996-06-26 2001-03-06 Henkel Corporation Ammonium thiosulfate complex of gold or silver and an amine
US5939034A (en) * 1996-06-26 1999-08-17 Henkel Corporation Process for the recovery of precious metal values from aqueous ammoniacal thiosulfate leach solutions
US5876588A (en) * 1996-12-18 1999-03-02 Ug Plus International Inc. Process for removing and recovering copper, silver and zinc from sulfide ores
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
AU767254B2 (en) * 1999-04-26 2003-11-06 Cognis Corporation Recovery of precious metal values from aqueous ammoniacal thiosulfate leach solutions
US6660059B2 (en) 2000-05-19 2003-12-09 Placer Dome Technical Services Limited Method for thiosulfate leaching of precious metal-containing materials
US7066983B2 (en) 2000-05-19 2006-06-27 Placer Dome Technical Services Limited Method for thiosulfate leaching of precious metal-containing materials
US7559974B2 (en) 2000-05-19 2009-07-14 Placer Dome Technical Services Ltd. Method for thiosulfate leaching of precious metal-containing materials
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
US7559973B2 (en) 2003-04-04 2009-07-14 Newmont Usa Limited Precious metal recovery using thiocyanate lixiviant
US7537640B2 (en) 2003-04-04 2009-05-26 Newmont Usa Limited Precious metal recovery using thiocyanate lixiviant
US7285256B2 (en) 2003-04-04 2007-10-23 Newmont Usa Limited Precious metal recovery using thiocyanate lixiviant
US7947108B2 (en) 2003-04-04 2011-05-24 Newmont Usa Limited Precious metal recovery using thiocyanate lixiviant
US7604783B2 (en) 2004-12-22 2009-10-20 Placer Dome Technical Services Limited Reduction of lime consumption when treating refractor gold ores or concentrates
US7572317B2 (en) 2005-11-10 2009-08-11 Barrick Gold Corporation Thiosulfate generation in situ in precious metal recovery
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
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
RU2472863C2 (ru) * 2010-10-07 2013-01-20 Учреждение Российской академии наук Физический институт им. П.Н. Лебедева РАН (ФИАН) Универсальный способ селективного извлечения солей переходных, редкоземельных и актиноидных элементов из многокомпонентных растворов с помощью нанопористых материалов
US10415116B2 (en) 2010-12-07 2019-09-17 Barrick Gold Corporation Co-current and counter current resin-in-leach in gold leaching processes
US9051625B2 (en) 2011-06-15 2015-06-09 Barrick Gold Corporation Method for recovering precious metals and copper from leach solutions
US10161016B2 (en) 2013-05-29 2018-12-25 Barrick Gold Corporation Method for pre-treatment of gold-bearing oxide ores
US10597752B2 (en) 2013-05-29 2020-03-24 Barrick Gold Corporation Method for pre-treatment of gold-bearing oxide ores
US11401580B2 (en) 2013-05-29 2022-08-02 Barrick Gold Corporation Method for pre-treatment of gold-bearing oxide ores
US9827547B2 (en) 2013-08-15 2017-11-28 Hatch Ltd. Multi-compartment reactor and method for controlling retention time in a multi-compartment reactor
US11639540B2 (en) 2019-01-21 2023-05-02 Barrick Gold Corporation Method for carbon-catalysed thiosulfate leaching of gold-bearing materials
US12065714B2 (en) 2019-01-21 2024-08-20 Barrick Gold Corporation Method for carbon-catalysed thiosulfate leaching of gold-bearing materials
CN110921811A (zh) * 2019-11-29 2020-03-27 南京华创环境技术研究院有限公司 一种改性火山岩填料及其制备方法和应用
CN110921811B (zh) * 2019-11-29 2022-11-15 南京华创环境技术研究院有限公司 一种改性火山岩填料及其制备方法和应用
CN115612857A (zh) * 2022-10-25 2023-01-17 昆明理工大学 一种选择性回收废旧电路板浸出液中金(iii)的方法
CN115612857B (zh) * 2022-10-25 2023-10-20 昆明理工大学 一种选择性回收废旧电路板浸出液中金(iii)的方法

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AU647074B2 (en) 1994-03-17
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AU7072591A (en) 1991-08-21

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