WO2005064023A1 - Procede de recuperation de metaux precieux de concentres et de minerais sulfures refractaires - Google Patents

Procede de recuperation de metaux precieux de concentres et de minerais sulfures refractaires Download PDF

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Publication number
WO2005064023A1
WO2005064023A1 PCT/IB2004/003972 IB2004003972W WO2005064023A1 WO 2005064023 A1 WO2005064023 A1 WO 2005064023A1 IB 2004003972 W IB2004003972 W IB 2004003972W WO 2005064023 A1 WO2005064023 A1 WO 2005064023A1
Authority
WO
WIPO (PCT)
Prior art keywords
ore
concentrate
alkaline solution
pulp
treated
Prior art date
Application number
PCT/IB2004/003972
Other languages
English (en)
Inventor
Peter Andrew Spencer
Gregory Kitson Henderson
Original Assignee
Bateman Luxembourg Sa
Van Der Walt, Louis, Stephanus
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 Bateman Luxembourg Sa, Van Der Walt, Louis, Stephanus filed Critical Bateman Luxembourg Sa
Priority to AU2004309162A priority Critical patent/AU2004309162B2/en
Priority to EA200601081A priority patent/EA011927B1/ru
Priority to CA002553548A priority patent/CA2553548A1/fr
Priority to AP2006003649A priority patent/AP2106A/en
Publication of WO2005064023A1 publication Critical patent/WO2005064023A1/fr

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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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/11—Removing sulfur, phosphorus or arsenic other than by roasting
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • 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
    • 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
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C22B3/12—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
    • 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

  • THIS INVENTION relates to gold recovery. More particularly, it relates to a method of recovering metal values from refractory sulphide ores and concentrates. According to the invention, there is provided a method of recovering metal values from refractory sulphide ores and concentrates, which method includes the steps of comminuting a refractory sulphide ore or concentrate; treating the ore or concentrate in an alkaline solution with a pH of at least 1 1 ; and recovering the metal values from the treated ore or concentrate.
  • the alkaline solution may have a pH of at least 1 1 .
  • the alkaline solution has a pH of about 1 1 .5.
  • the metal value to be recovered will be gold, the metal values then being recovered from the treated ore or concentrate by conventional gold extraction methods.
  • sulphide ore or concentrate is to be understood to include ores or concentrates including at least one mineral selected from the group consisting of pyrite, marcasite, pyrrhotite, realgar, orpiment, stibnite, and arsenopyrite.
  • Comminuting the refractory sulphide ore or concentrate typically includes finely grinding the refractory ore or concentrate. More particularly, the refractory ore or concentrate may be ground into a particulate material such that about 80 % by weight of the particulate material has a particle size of less than about 20 micrometres, preferably such that about 80% by weight of the particulate material has a particle size of less than about 1 1 micrometres, more preferably such that about 80% by weight of the particulate material has a particle size of less than about 8 micrometres.
  • Comminution of the ore or concentrate may be by way of a wet grinding method. Comminution of the ore or concentrate may occur by use of a tumbling mill, a vibratory mill, a tower mill, an ultra fine grinding mill, such as that available from Metprotech, Inc., or an IsaMill.
  • Treating the ore or concentrate in alkaline solution may include forming a fluid mixture/pulp of the ground ore or concentrate with an alkaline solution having a pH of at least 1 1 . More particularly, treating the ground ore or concentrate may include forming a mixture of the ground ore or concentrate with water and adding a pH modifier to the water to yield an alkaline solution of pH at least 1 1 .
  • the ore or concentrate may be treated in alkaline solution for between about 2 hours and about 24 hours. It is to be noted that the alkaline treatment does not necessarily, and typically does not in fact, lead to the complete destruction of the sulphide mineral. In other words, the ore or concentrate is typically treated in the alkaline solution partially to dissolve the sulphide minerals in the alkaline solution.
  • the pH modifier may comprise at least one alkali selected from the group consisting of sodium hydroxide, sodium carbonate, sodium bicarbonate, sodium hypochlorite, and calcium hydroxide in combination with any of the aforementioned alkalis.
  • the pH modifier comprises sodium hydroxide.
  • Treating the ore or concentrate in alkaline solution may further include agitating the fluid mixture/pulp. It is to be appreciated that agitation serves to inhibit settling of and maintain in suspension the solid particulate material.
  • the method may include introducing oxygen into the pulp during agitation thereof.
  • Oxygen may be introduced into the pulp as oxygen gas or air injected into the pulp, by the addition of hydrogen peroxide to the pulp or by the diffusion of atmospheric oxygen into the pulp at a surface of the pulp exposed to atmosphere.
  • Treating the ore or concentrate in an alkaline solution may take place at atmospheric pressure. Treating the ore or concentrate may occur at a temperature between the boiling point and the freezing point of the alkaline solution.
  • Recovering the metal values from the treated ore or concentrate may include leaching the treated ground ore or concentrate.
  • Leaching the ore or concentrate may, for example, occur by cyanidation. Instead, leaching the ore or concentrate may be by the addition of any other leaching agent to the treated ground ore or concentrate.
  • Example 1 Refractory sulphide ore encapsulating gold was finely ground by use of an IsaMill such that about 80% of the ground ore particulate material had a particle size of 1 3.7 micrometres.
  • the finely ground ore was treated in a sodium hydroxide solution for four hours. Thereafter the treated ore was cyanide leached. Test results showed gold recovery to be around 72.22%.
  • Refractory sulphide ore encapsulating gold was finely ground by use of an IsaMill such that about 80% of the ground ore particulate material had a particle size of 1 3.7 micrometres.
  • the finely ground ore was treated in a sodium hydroxide solution for eight hours. Thereafter the treated ore was cyanide leached. Test results showed gold recovery to be around 72.91 %.
  • Example 3
  • Refractory sulphide ore encapsulating gold was finely ground by use of an IsaMill such that about 80% of the ground ore particulate material had a particle size of 1 3.7 micrometres.
  • the finely ground ore was treated in a sodium hydroxide solution for twelve hours. Thereafter the treated ore was cyanide leached. Test results showed gold recovery to be around 77.00%.
  • Refractory sulphide ore encapsulating gold was finely ground by use of a tower mill such that about 80% of the ground ore particulate material had a particle size of 1 0.9 micrometres.
  • the finely ground ore was treated in a sodium hydroxide solution for four hours. Thereafter the treated ore was cyanide leached. Test results showed gold recovery to be around 81 .88%.
  • Refractory sulphide ore encapsulating gold was finely ground by use of a tower mill such that about 80% of the ground ore particulate material had a particle size of 1 0.9 micrometres.
  • the finely ground ore was treated in a sodium hydroxide solution for eight hours. Thereafter the treated ore was cyanide leached. Test results showed gold recovery to be around 86.08%.
  • Example 6
  • Refractory sulphide ore encapsulating gold was finely ground by use of a tower mill such that about 80% of the ground ore particulate material had a particle size of 1 0.9 micrometres.
  • the finely ground ore was treated in a sodium hydroxide solution for twelve hours. Thereafter the treated ore was cyanide leached. Test results showed gold recovery to be around 93.53%.
  • Refractory sulphide ore encapsulating gold was finely ground by use of a vibratory mill such that about 80% of the ground ore particulate material had a particle size of 7.6 micrometres.
  • the finely ground ore was treated in a sodium hydroxide solution for four hours. Thereafter the treated ore was cyanide leached. Test results showed gold recovery to be around 88.67 %.
  • Refractory sulphide ore encapsulating gold was finely ground by use of a vibratory mill such that about 80% of the ground ore particulate material had a particle size of 7.6 micrometres.
  • the finely ground ore was treated in a sodium hydroxide solution for eight hours. Thereafter the treated ore was cyanide leached. Test results showed gold recovery to be around 92.70%.
  • Refractory sulphide ore encapsulating gold was finely ground by use of a vibratory mill such that about 80% of the ground ore particulate material had a particle size of 7.6 micrometres.
  • the finely ground ore was treated in a sodium hydroxide solution for twelve hours. Thereafter the treated ore was cyanide leached. Test results showed gold recovery to be around 95.89%.
  • the Applicant believes that the method of the invention, provides an effective method for the recovery of gold with improved gold recovery from refractory sulphide ores over prior art methods. It is believed that the alkaline pre-treatment attacks and dissolves sulphide minerals in the ore at surfaces under which gold values are located and where there are distortions in the crystal lattice. These effects are greatest for fine particle sizes. It is believed that the method, performed as it is at atmospheric pressure and temperature, will not require specialised equipment nor material for construction of such equipment nor will it require the use of chemicals not ordinarily available on a gold leaching plant.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (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)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Procédé de récupération de métaux précieux de concentrés et de minerais sulfurés réfractaires, comprenant les étapes consistant à broyer finement un concentré ou minerai sulfuré réfractaire, à traiter le concentré ou le minerai dans une solution alcaline et à récupérer les métaux précieux du concentré ou minerai traité.
PCT/IB2004/003972 2003-12-23 2004-12-03 Procede de recuperation de metaux precieux de concentres et de minerais sulfures refractaires WO2005064023A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2004309162A AU2004309162B2 (en) 2003-12-23 2004-12-03 A method of recovering metal values from refractory sulphide ores and concentrates
EA200601081A EA011927B1 (ru) 2003-12-23 2004-12-03 Способ выделения золота из тугоплавких сульфидных руд и концентратов
CA002553548A CA2553548A1 (fr) 2003-12-23 2004-12-03 Procede de recuperation de metaux precieux de concentres et de minerais sulfures refractaires
AP2006003649A AP2106A (en) 2003-12-23 2004-12-03 A method of recovering metal values from refractory sulphide ores and concentrates

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2003/9970 2003-12-23
ZA200309970 2003-12-23

Publications (1)

Publication Number Publication Date
WO2005064023A1 true WO2005064023A1 (fr) 2005-07-14

Family

ID=34740243

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/003972 WO2005064023A1 (fr) 2003-12-23 2004-12-03 Procede de recuperation de metaux precieux de concentres et de minerais sulfures refractaires

Country Status (6)

Country Link
AP (1) AP2106A (fr)
AU (1) AU2004309162B2 (fr)
CA (1) CA2553548A1 (fr)
EA (1) EA011927B1 (fr)
WO (1) WO2005064023A1 (fr)
ZA (1) ZA200501060B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012214865A (ja) * 2011-03-30 2012-11-08 Jx Nippon Mining & Metals Corp 金の浸出方法
CN104694764A (zh) * 2015-03-09 2015-06-10 中南大学 一种细粒级包裹金的强化浸出方法
CN104894371A (zh) * 2015-06-12 2015-09-09 鞍钢集团矿业公司 利用氧化碱浸、酸洗及重选再选钒钛磁铁精矿的方法
WO2019064709A1 (fr) * 2017-09-26 2019-04-04 Ｊｘ金属株式会社 Procédé de lixiviation d'or et procédé de récupération d'or

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104593583B (zh) * 2014-12-24 2017-03-08 中国科学院地球化学研究所 一种卡林型难浸金矿石的湿法预处理方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4632701A (en) * 1984-09-27 1986-12-30 Sherritt Gordon Mines Limited Process for the recovery of silver from a residue essentially free of elemental sulphur
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
EP0316094A2 (fr) * 1987-11-07 1989-05-17 Davy Mckee (Stockton) Limited Procédé de séparation
WO2000017407A1 (fr) * 1998-09-21 2000-03-30 M.I.M. Holdings Limited Procede de traitement de minerais contenant des metaux precieux

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4632701A (en) * 1984-09-27 1986-12-30 Sherritt Gordon Mines Limited Process for the recovery of silver from a residue essentially free of elemental sulphur
EP0316094A2 (fr) * 1987-11-07 1989-05-17 Davy Mckee (Stockton) Limited Procédé de séparation
WO2000017407A1 (fr) * 1998-09-21 2000-03-30 M.I.M. Holdings Limited Procede de traitement de minerais contenant des metaux precieux

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012214865A (ja) * 2011-03-30 2012-11-08 Jx Nippon Mining & Metals Corp 金の浸出方法
CN104694764A (zh) * 2015-03-09 2015-06-10 中南大学 一种细粒级包裹金的强化浸出方法
CN104894371A (zh) * 2015-06-12 2015-09-09 鞍钢集团矿业公司 利用氧化碱浸、酸洗及重选再选钒钛磁铁精矿的方法
WO2019064709A1 (fr) * 2017-09-26 2019-04-04 Ｊｘ金属株式会社 Procédé de lixiviation d'or et procédé de récupération d'or
AU2018340945B2 (en) * 2017-09-26 2021-05-27 Jx Nippon Mining & Metals Corporation Gold leaching method and gold recovery method

Also Published As

Publication number Publication date
AU2004309162B2 (en) 2009-04-09
AP2006003649A0 (en) 2006-06-30
CA2553548A1 (fr) 2005-07-14
ZA200501060B (en) 2006-05-31
EA011927B1 (ru) 2009-06-30
AP2106A (en) 2010-02-10
AU2004309162A1 (en) 2005-07-14
EA200601081A1 (ru) 2007-02-27

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