[go: up one dir, main page]

EP0115500A1 - Recuperation d'argent et d'or a partir de minerais et de concentres - Google Patents

Recuperation d'argent et d'or a partir de minerais et de concentres

Info

Publication number
EP0115500A1
EP0115500A1 EP83902420A EP83902420A EP0115500A1 EP 0115500 A1 EP0115500 A1 EP 0115500A1 EP 83902420 A EP83902420 A EP 83902420A EP 83902420 A EP83902420 A EP 83902420A EP 0115500 A1 EP0115500 A1 EP 0115500A1
Authority
EP
European Patent Office
Prior art keywords
process according
gold
silver
solution
mixture
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.)
Withdrawn
Application number
EP83902420A
Other languages
German (de)
English (en)
Other versions
EP0115500A4 (fr
Inventor
Peter Kenneth Everett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dextec Metallurgical Pty Ltd
Original Assignee
Dextec Metallurgical Pty Ltd
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 Dextec Metallurgical Pty Ltd filed Critical Dextec Metallurgical Pty Ltd
Publication of EP0115500A1 publication Critical patent/EP0115500A1/fr
Publication of EP0115500A4 publication Critical patent/EP0115500A4/fr
Withdrawn legal-status Critical Current

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
    • C22B11/06—Chloridising
    • 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
    • C22B11/04—Obtaining noble metals by wet processes

Definitions

  • This invention relates to a hydrometallurgical method of recovering silver and/or gold from ores and concentrates. Particularly it applies to ores which are not easily treated by normal methods.
  • the present invention relates to the treatment of minerals, where not only must a strong oxidant such as chlorine be used, but a high oxidation potential must be maintained in the solution to prevent reprecipitation of the Ag.
  • a process for the recovery of silver and/ or gold from a silver and/or gold bearing ore or concentrate which includes
  • a process for the recovery of silver and/or gold from a silver and/or gold bearing ore or concentrate which includes 1) forming a mixture of ore or concentrate and a strong electrolyte containing chloride ions, in an anolyte compartment of a cylindrical diaphragm cell, the cell also including an anode, a cathode and a catholyte compartment, 2) maintaining the mixture at a temperature up to the boiling point of the electrolyte whereby the silver and/ or gold is taken into solution,
  • the oxidation potential (Eh) is maintained above about 850 m.v. It has been found by keeping the Eh above about 750 m.v. that reprecipitation of silver and/or gold is inhibited.
  • a source of chlorine is usually chlorine gas or hypochlorite ion (e.g. sodium hypochlorite) .
  • hypochlorite ion e.g. sodium hypochlorite
  • an oxygen bearing gas is introduced into the mixture prior to introducing a source of chlorine. This reduces the amount of chlorine subsequently required. When chlorination does occur, it is preferably carried out at a pH of approximately 7.
  • the resultant solution contains free chlorine.
  • This free chlorine is recovered from the solution by blowing oxygen bearing gases through the solution prior to recovery of the silver and/or gold.
  • the mixture of free chlorine and gas is conducted to another vessel containing fresh ore or concentrate, to effect a preliminary oxidation.
  • the recovery of silver and/or gold is achieved by precipitation via contact of the solution with a reductant.
  • the reductant may be a metal (iron or steel) having a potential above that of silver and/or gold in the electrochemical series.
  • pH of the solution during treatment of the ore or concentrate it will be well known to those skilled in the art that same is normally set according to the type of ore or concentrate. For example it is preferable to treat carbonate containing ores or concentrates at a pH of about 7. At this level the material is stable. Similarly if the ore or concentrate contains sulphides, it is preferable to carry out the reaction at a pH of below 7. Typically when one is recovering gold a preferred pH is above 5 and more preferabl about 7. Thus it is to be understood that the present invention is not restricted to a pH of a particular range.
  • An Ag bearing mineral was slurried with a strong chloride solution, 25% NaCl, and aerated for 1 to 2 hours at approximately 20 C to treat any easily oxidizable material present. This preliminary aeration can reduce the amount of chlorine required for the Ag leaching in the next step.
  • chlorine was added to the slurry mixture in the form of sodium hypochlorite or preferably chlorine gas, and the oxidation potential (Eh) maintained above a value of 750 m.v.
  • the chlorination was preferably carried out at a pH of approximately 7.0.
  • Table I shows the leaching and reprecipitation of the Ag from solution when the Eh was allowed to fall below 750 m.v.
  • Table II shows the leaching and high recovery of Ag from this particular mineral when the Eh was maintained above 850 m.v. throughout the test.
  • Feed 260 ppm Feed 260 ppm Residue 250 ppm Residue 9 ppm
  • the solution contained free chlorine.
  • the solution pH was adjusted to approximately 2.5 to 3.0 and air was blown into the solution to remove free chlorine with the exit gases. These gases were conducted to another vessel con ⁇ taining a new batch of ore, to effect a preliminary oxidation.
  • the chlorine free solution was passed to a vessel where it was contacted with a metallic iron reductant. Typically, this operation was effected by passage of the electrolyte down a column of vertical steel rods, for example 2 mm diameter. The Ag formed a powdery deposit on the surface of the iron. Periodically the column was either vibrated slightly or the solution flow adjusted to accomplish the removal of-Ag from the iron surface resulting in collection of the powder in the
  • Chlorine was added to slurries of ore (300 g/1) in sodium chloride solution (300 g/1 NaCl) to maintain the Eh above 750 m.v.
  • the pH was varied between pH 3.0 and 8.0.
  • a cylindrical diaphragm cell was provided to achieve maximum anolyte volume for treatment of low grade ores with a small catholyte volume on the outside of the cylindrical diaphragm, in a cylindrical tank. Current was passed
  • OMPI IPO between the anodes, for example graphite, and a high surface area cathode, for example copper, while the silver and/or gold bearing ore was agitated slowly in the anolyte compartment.
  • Hydrogen may have been liberated at the cathode to form sodium hydroxide, and oxidized chlorine species may have been formed at the anode.
  • Some mixing of the anolyte and the catholyte may have resulted in the formation of such compounds as NaOCl.
  • the method and apparatus of the invention results in a greater than 20 times reduction in reagent costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

Procédé de dissolution d'argent et d'or à partir de minerais et de concentrés dans une solution à teneur élevée en chlorure où le Eh est maintenu en dessus de la valeur de 750 m.v. et de préférence en dessus d'une valeur de 850 m.v. Ce procédé peut comprendre l'étape supplémentaire consistant à extraire l'excédent de chlore de la solution en insufflant de l'air dans la solution et en conduisant l'air et le gaz de chlore dans un autre récipient où le chlore réagit avec du minerai ou du concentré frais. On met ensuite en contact la solution exempte de chlore avec un agent réducteur solide pour produire un précipité d'argent ou d'or. Le procédé ci-décrit convient particulièrement à l'utilisation dans une cellule électrochimique à diaphragme.
EP19830902420 1982-08-05 1983-08-02 Recuperation d'argent et d'or a partir de minerais et de concentres. Withdrawn EP0115500A4 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AU5226/82 1982-08-05
AUPF522682 1982-08-05
AU7224/82 1982-12-10
AUPF722482 1982-12-10

Publications (2)

Publication Number Publication Date
EP0115500A1 true EP0115500A1 (fr) 1984-08-15
EP0115500A4 EP0115500A4 (fr) 1984-11-23

Family

ID=25642566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830902420 Withdrawn EP0115500A4 (fr) 1982-08-05 1983-08-02 Recuperation d'argent et d'or a partir de minerais et de concentres.

Country Status (8)

Country Link
EP (1) EP0115500A4 (fr)
JP (1) JPS59501370A (fr)
FI (1) FI841328L (fr)
IT (1) IT1228590B (fr)
NZ (1) NZ205153A (fr)
PH (1) PH19799A (fr)
WO (1) WO1984000563A1 (fr)
ZW (1) ZW17483A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2312909C1 (ru) * 2006-02-13 2007-12-20 Иркутская Городская Общественная Организация "Экологическая Группа" Способ извлечения металлов
RU2476610C2 (ru) * 2010-12-28 2013-02-27 Общество с ограниченной ответственностью "Научно-внедренческое предприятие "Флюидные Технологии и Экология" Способ извлечения металлов из металлсодержащего минерального сырья
RU2497962C1 (ru) * 2012-05-17 2013-11-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Забайкальский государственный университет" (ФГБОУ ВПО "ЗабГУ") Способ извлечения дисперсного золота из упорных руд
WO2014033548A2 (fr) 2012-08-14 2014-03-06 Arye Barboy Procédé pour l'extraction de métaux nobles et non ferreux à partir de matières premières réfractaires
RU2655413C2 (ru) * 2015-02-12 2018-05-28 БЕЛОЗЕРОВА Татьяна Алексеевна Способ переработки полиметаллического сырья (варианты) и устройство для его выщелачивания

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6115986A (en) * 1985-08-29 1987-03-05 296388 B.C. Ltd. Recovery of precious metals (esp. silver) by cementation fromsolution with magnesium particles
GB2181452B (en) * 1985-09-10 1989-06-07 Dean Butler Leaching process
JP2794815B2 (ja) * 1989-08-31 1998-09-10 三菱マテリアル株式会社 金電解製錬装置
RU2120487C1 (ru) * 1997-12-23 1998-10-20 Амурский комплексный научно-исследовательский институт Амурского научного центра Дальневосточного отделения РАН Способ переработки золотосодержащего сырья
RU2118991C1 (ru) * 1998-03-25 1998-09-20 Жагин Борис Петрович Способ подземного выщелачивания золота из руд россыпных месторождений
JP2006512484A (ja) 2002-12-31 2006-04-13 インテック・リミテッド 硫化物系材料からの金属の回収
CN100485055C (zh) * 2007-02-09 2009-05-06 上海大学 电化学氧化法浸取难浸金矿的方法
CN100473732C (zh) * 2007-02-09 2009-04-01 上海大学 一种电化学氧化法浸取难浸金矿的设备
EP2435590B1 (fr) * 2009-05-26 2018-06-20 Metaleach Limited Procédé de lixiviation par oxydation de minerais et/ou concentrés sulfurés
FI124882B (fi) * 2012-10-03 2015-03-13 Outotec Finland Oy Menetelmä ja laite hopean talteenottamiseksi rikkipitoisista sinkin uuttojäännöksistä selektiivisellä liuotuksella ja menetelmä ja säätöjärjestelmä liuotusprosessin säätämiseksi ja tietokoneohjelma
AU2015259608B2 (en) 2014-05-12 2019-10-03 Sumitomo Corporation Of Americas Brine leaching process for recovering valuable metals from oxide materials
JP6492970B2 (ja) * 2015-05-26 2019-04-03 住友金属鉱山株式会社 金、銀の湿式電解採取方法および金、銀の湿式電解採取設備

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2835569A (en) * 1956-04-19 1958-05-20 Electro Chimie Metal Process of extracting gold and other metals from ores, concentrates, residues and the like containing principally cobalt, nickel, iron, arsenic and gold
US3639925A (en) * 1968-05-15 1972-02-08 Us Interior Recovery of gold from carbonaceous ores
US3536443A (en) * 1968-06-07 1970-10-27 Eastman Kodak Co Process for recovering metal compounds
US3772003A (en) * 1972-02-07 1973-11-13 J Gordy Process for the electrolytic recovery of lead, silver and zinc from their ore
AU5203873A (en) * 1972-02-10 1974-08-15 Australian Mineral Development Laboratories ELECTROLYTIC OXIDATION AND REDUCTION OF Specification SULPHIDE CONCENTRATES
US3736238A (en) * 1972-04-21 1973-05-29 Cyprus Metallurg Process Process for the recovery of metals from sulfide ores through electrolytic dissociation of the sulfides
US3957603A (en) * 1974-06-14 1976-05-18 Electromet, Inc. Electrolytic gold recovery and separation process
DE2734249A1 (de) * 1977-07-29 1979-02-08 Bayer Ag Oberschenkelhalsprothese
ZW22281A1 (en) * 1980-09-29 1981-12-09 Dextec Metallurg Recovery of silver and gold from ores and concentrtes

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
No further relevant documents have been disclosed *
See also references of WO8400563A1 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2312909C1 (ru) * 2006-02-13 2007-12-20 Иркутская Городская Общественная Организация "Экологическая Группа" Способ извлечения металлов
RU2476610C2 (ru) * 2010-12-28 2013-02-27 Общество с ограниченной ответственностью "Научно-внедренческое предприятие "Флюидные Технологии и Экология" Способ извлечения металлов из металлсодержащего минерального сырья
RU2497962C1 (ru) * 2012-05-17 2013-11-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Забайкальский государственный университет" (ФГБОУ ВПО "ЗабГУ") Способ извлечения дисперсного золота из упорных руд
WO2014033548A2 (fr) 2012-08-14 2014-03-06 Arye Barboy Procédé pour l'extraction de métaux nobles et non ferreux à partir de matières premières réfractaires
RU2510669C2 (ru) * 2012-08-14 2014-04-10 Арье БАРБОЙ Способ извлечения благородных металлов из упорного сырья
RU2655413C2 (ru) * 2015-02-12 2018-05-28 БЕЛОЗЕРОВА Татьяна Алексеевна Способ переработки полиметаллического сырья (варианты) и устройство для его выщелачивания
RU2655413C9 (ru) * 2015-02-12 2018-07-24 БЕЛОЗЕРОВА Татьяна Алексеевна Способ переработки полиметаллического сырья (варианты) и устройство для его выщелачивания

Also Published As

Publication number Publication date
NZ205153A (en) 1985-08-30
FI841328A0 (fi) 1984-04-03
FI841328A7 (fi) 1984-04-03
EP0115500A4 (fr) 1984-11-23
IT1228590B (it) 1991-06-24
PH19799A (en) 1986-07-02
JPS59501370A (ja) 1984-08-02
WO1984000563A1 (fr) 1984-02-16
FI841328L (fi) 1984-04-03
ZW17483A1 (en) 1983-10-26
IT8348784A0 (it) 1983-07-29

Similar Documents

Publication Publication Date Title
AP538A (en) Production of metal from minerals
US4342592A (en) Non-polluting process for recovery of precious metal values from ores including those containing carbonate materials
US4980134A (en) Leaching process
EP0115500A1 (fr) Recuperation d'argent et d'or a partir de minerais et de concentres
RU2124573C1 (ru) Способ гидрометаллургического извлечения
US4061552A (en) Electrolytic production of copper from ores and concentrates
PL111879B1 (en) Method of recovery of copper from diluted acid solutions
US4687559A (en) Treatment of residues for metal recovery
EP0197071B1 (fr) Production de zinc a partir de minerais et de concentres
AU558740B2 (en) Recovery of silver and gold from ores and concentrates
EP0061468B1 (fr) Recuperation d'argent a partir de minerais et de concentres
CA1092365A (fr) Raffinage de minerais et de schlich a base de fer et de metal sulfure
AU734584B2 (en) Production of electrolytic copper from dilute solutions contaminated by other metals
US4381225A (en) Production of lead from ores and concentrates
US4028202A (en) Direct electrochemical recovery of copper from dilute ammoniacal solutions
RU2829623C1 (ru) Способ обезмеживания шламов электролитического рафинирования вторичной меди
CA1235577A (fr) Traitement de residus
Arslan et al. Electrooxidation of gold-bearing sulfide concentrate
US4734172A (en) Method for selectively recovering lead from complex sulphidic non-ferrous metal concentrates
PL111091B1 (en) Process for recovering the high purity copper from diluted ammonia solution
Kirk et al. Electrochemical leaching of a silver arsenopyrite ore
NO841141L (no) Utvinning av soelv og gull fra malmer og konsentrater
WO1992018654A1 (fr) Procede de traitement des mousses de flottage a ions

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19840503

AK Designated contracting states

Designated state(s): DE FR GB SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19870526

RIN1 Information on inventor provided before grant (corrected)

Inventor name: EVERETT, PETER, KENNETH