WO2009072908A2 - Système de récupération d'or et son processus - Google Patents

Système de récupération d'or et son processus Download PDF

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Publication number
WO2009072908A2
WO2009072908A2 PCT/PH2008/000012 PH2008000012W WO2009072908A2 WO 2009072908 A2 WO2009072908 A2 WO 2009072908A2 PH 2008000012 W PH2008000012 W PH 2008000012W WO 2009072908 A2 WO2009072908 A2 WO 2009072908A2
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WO
WIPO (PCT)
Prior art keywords
gold
sulfhydric
sand
collector
treating
Prior art date
Application number
PCT/PH2008/000012
Other languages
English (en)
Other versions
WO2009072908A3 (fr
Inventor
Antonio M. Ostrea
Original Assignee
Ostrea Antonio M
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 Ostrea Antonio M filed Critical Ostrea Antonio M
Publication of WO2009072908A2 publication Critical patent/WO2009072908A2/fr
Publication of WO2009072908A3 publication Critical patent/WO2009072908A3/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
    • 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
    • C22B3/22—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/001—Flotation agents
    • B03D1/004—Organic compounds
    • B03D1/008—Organic compounds containing oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/001—Flotation agents
    • B03D1/004—Organic compounds
    • B03D1/012—Organic compounds containing sulfur
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2201/00—Specified effects produced by the flotation agents
    • B03D2201/02—Collectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00—Specified materials treated by the flotation agents; specified applications
    • B03D2203/02—Ores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00—Specified materials treated by the flotation agents; specified applications
    • B03D2203/02—Ores
    • B03D2203/025—Precious metal ores
    • 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 an improved system of gold recovery whereby the bulk waste component of a gold ore is removed by a pre- concentration process and the resultant concentrate is then treated by conventional methods. More specifically, the present invention relates to a system of gold recovery whereby the bulk waste component of a gold ore is removed by froth flotation and the resultant concentrate is then treated by conventional cyanide leaching procedures.
  • CIP Carbon in Pulp
  • the gold bearing ore is crushed, then finely ground as a slurry to around 75 microns.
  • the slurry or pulp is treated with cyanide through a series of tanks.
  • Granulated carbon is passed through the tanks countercurrent to the flow of the pulp, allowing said carbon to adsorb increasing quantities of gold from the pulp.
  • the loaded carbon is then separated from the pulp and treated with hot cyanide and caustic solution to remove gold from carbon.
  • CIL Carbon in Leach
  • Gold ores are at present becoming leaner in grade, and more and more are being classified as "unclean ores".
  • the valuable metal component is only a small percentage of the original bulk.
  • only a small amount of gold is present in the slurry or pulp treated with cyanide, in the above-mentioned processes.
  • the bulk of the waste component of the ore has to be removed prior to cyanidation by a pre-concentration process so that said waste, comprising mainly of rock components, is out of the process stream before the latter comes into contact with the cyanide solution.
  • the pre-concentration process may be selected from gold recovery processes known in the art.
  • U.S. Patent No. 4,710,361 discloses the use of sulfhydric fatty acid collector applied to typical gold tailings material containing 0.6 to 1.0 gram Au/MT, which resulted in a gold recovery of 95%.
  • the same patent disclosed that subsequent cleaner (upgrading) operation produced a final concentrate with a grade of 4.8 gram to 7.2 Au/MT at a substantial gold recovery of 89%.
  • the object of the present invention is to provide a system of gold recovery whereby the bulk waste component of a gold ore is removed by froth flotation and the resultant concentrate is then treated by conventional cyanide leaching procedures.
  • Another object of the invention is to provide a system of gold recovery, which utilizes a sulfhydric - fatty acid reagent combination as a collector or promoter of the gold present in the "unclean" ore material, as a pre- concentration means applied prior to conventional cyanide leaching procedures.
  • Another object of the invention is to provide a system of gold recovery, which is inexpensive and more efficient in attaining higher recovery from the "ore" or gold-bearing material by cyanidation using conventional CIP/CIL operations.
  • Another object of the invention is to provide a system of gold recovery that can be applied to ores containing gold to as low as 0.5% gm/MT concentrations.
  • Another object of the invention is to provide a system of gold recovery that can be effective even with recalcitrant ores, i.e. sulfidic ores or refractory gold ores.
  • Yet another object of the invention is to provide a system of gold recovery wherein a pre-concentrate may be stored, or transported, such as to a metal smelter, if cyanidation is not permissible or is impractical after the pre- concentration process, and thus the CIP/CIL plant can be located far from the deposit, allowing a substantial amount of economic benefits to the user.
  • refining of the gold concentrate can take place in an area of improved security and safety, such as in more urban areas.
  • Fig. A shows a schematic representation of a system of gold recovery according to the present invention. Detailed Description of the Invention
  • the present invention relates to a system of gold recovery whereby the bulk waste component of a gold ore is removed by froth flotation and the resultant concentrate is then treated by conventional cyanide leaching procedures.
  • the waste component comprises about 95% in "unclean" ores, with only about 5% of gold, conventional cyanidation processes are inefficient in that the cyanide solution is in contact with a large amount of non- gold material.
  • the volume of waste component drops by a factor of 10, and in some instances, it drops by as high as a factor of 20. Consequently, the size of cyanidation plants may be reduced to one- tenth of that required for conventional CIP/CIL processes.
  • Figure A shows a schematic representation of the present system of gold recovery, comprising the sulfhydric fatty acid flotation pre-concentration process and conventional CIP/CIL processes.
  • the gold recovery system according to the present invention comprises of the following steps:
  • the level of gold recovered increased from 92 % of the conventional CIP/CIL process to 96-98 %.
  • the ore obtained from the Balatoc mine comprises 6.0 g/MT of gold.
  • the flotation process 94- 97 % of gold was recovered and the resultant concentrate comprises of 50 g/MT gold.
  • the concentrate was then treated with cyanide according to conventional CIP/CIL process.
  • the gold recovered amounted to 98 % of the gold present in the concentrate.
  • the table below shows the recovery of gold from different ores that are representative of Philippines gold-bearing ores or materials at different stages of the gold recovery system according to the present invention, including the overall recovery.
  • Gold recovery from the Balatoc ore using conventional CIP/CIL alone is only about 85- 92 %.
  • the above test clearly shows an improvement in gold recovery with the system of gold recovery according to the present invention
  • the present invention utilizes a sulfhydric - fatty acid reagent combination as a collector or promoter of the gold present in the "unclean" ore material, as a pre-concentration means.
  • Suitable sulfhydric collectors may be xanthate and may be sodium ethyl xanthate or sodium isobutyl xanthate, which are available commercially.
  • Suitable fatty acid collectors may be selected from commercially available mixtures containing oleic and linoleic acids along with rosin acids, among others.
  • the percentage range of reagent combination used in the flotation process applied to tailings is from 5% to 20% of sulfhydric collector and 80% to 95% of fatty acid collector depending among other things on the alkalinity - acidity of the floatation pulp.
  • the total amount of collector dosage is from 0.5 to 3 IbsJMT of material.
  • the pH range in which the sulfhydric-fatty acid collector is effective, based on the material treated is from pH 5 to pH 8.
  • 100% sulfhydric collector may be used.
  • the percentage range of reagent used in the flotation process is from 60 to 80 % sulfhydric collector and 20 to 40 % fatty acid collector.
  • the present invention has been proven effective for various ore materials containing gold as low as 0.5 gm/MT concentrations and has also been found to be effective even with recalcitrant ores, i.e, sulfidic ores or refractory gold ores.
  • the pre-concentrate may be stored, or transported, such as to a metal smelter, if cyanidation is not permissible or is impractical after the pre-concentration process under the conditions obtaining.
  • the CIP/CIL plant can, therefore, be located far from the deposit, allowing a substantial amount of economic benefits to its user.
  • the concentrates from the treatment of the primary and secondary slimes and sand were then collected and further classified, separating sand therefrom and grinding the coarse fraction to a product, all essentially passing 20 -30 microns.
  • the concentrate was then treated with cyanide.
  • Activated carbon was then passed countercurrent to the flow of the concentrate. Thereafter, cyanidation tails and residue were separated from the loaded carbon, and said loaded carbon was treated with hot cyanide and caustic solution.
  • the resultant liquor underwent Electrowinning and the recovered gold was smelted into bullions.
  • the gold recovery system according to the present invention was found to be similarly efficient with different kinds of ores found at three other mine sites along the Philippine fault, from north to south, namely, Bicol (Camarines).

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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)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

La présente invention concerne un système de récupération d'or, le composant d'un minerai d'or présent dans des déchets en vrac étant retiré par flottation par moussage et le concentré résultant étant ensuite traité selon des procédures classiques de lixiviation au cyanure. L'invention est caractérisée en ce que 96 - 98 % d'or provenant du minerai sont finalement récupérés, le système comportant les étapes suivantes : a) concassage et broyage du minerais; b) séparation du sable de la boue primaire; c) traitement de ladite boue primaire avec un collecteur sulfhydrique; d) broyage secondaire dudit sable, et séparation de la boue secondaire du sable; e) traitement de ladite boue secondaire avec un collecteur sulfhydrique - d'acides gras; f) traitement dudit sable avec le collecteur sulfhydrique - d'acides gras; g) collecte des concentrés issus de (3), (5) et (6), et séparation du sable desdits concentrés (à 20 - 30 μ); h) traitement dudit concentré avec du cyanure; i) passage d'un contre-courant de charbon actif dans le flux du concentré; j) séparation des rejets et résidus issus du charbon chargé; k) traitement du carbone chargé avec du cyanure chaud et une solution caustique; et I) extraction par voie électrolytique de la liqueur et fusion de l'or en lingots.
PCT/PH2008/000012 2007-12-04 2008-12-04 Système de récupération d'or et son processus WO2009072908A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PH1-2007-00490 2007-12-04
PH12007000490 2007-12-04

Publications (2)

Publication Number Publication Date
WO2009072908A2 true WO2009072908A2 (fr) 2009-06-11
WO2009072908A3 WO2009072908A3 (fr) 2009-10-15

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102002587A (zh) * 2010-11-10 2011-04-06 紫金矿业集团股份有限公司 一种难处理金精矿生物氧化渣氰化提金方法
WO2012053915A1 (fr) 2011-04-20 2012-04-26 Ostrea Antonio M Procédé de récupération d'or et de cuivre à partir de minerais mixtes de cuivre oxydé-sulfuré
CN104451122A (zh) * 2015-01-01 2015-03-25 长春黄金研究院 一种加热钝化预处理浸出工艺
CN104745833A (zh) * 2013-12-25 2015-07-01 北京有色金属研究总院 一种用于高泥金矿石的处理工艺
CN107876206A (zh) * 2017-11-23 2018-04-06 山东九曲圣基新型建材有限公司 一种完全利用黄金尾矿的方法
CN111719050A (zh) * 2020-07-07 2020-09-29 昆明理工大学 一种综合回收锌浸出渣中水溶锌和银的方法
CN112853115A (zh) * 2020-12-30 2021-05-28 浙江遂昌汇金有色金属有限公司 高效炼金工艺
CN113151688A (zh) * 2021-04-06 2021-07-23 兰州有色冶金设计研究院有限公司 一种含金矿提金协同处理氰化尾渣的方法及系统
CN113736997A (zh) * 2021-09-07 2021-12-03 山东国大黄金股份有限公司 一种硫酸协同处理氰化尾渣脱氰浮选回收金银的方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4441993A (en) * 1975-11-03 1984-04-10 Fluor Corporation Flotation process
US4710361A (en) * 1983-01-14 1987-12-01 Ostrea Antonio M Gold recovery by sulhydric-fatty acid flotation as applied to gold ores/cyanidation tailings
US5336474A (en) * 1990-06-02 1994-08-09 Degussa Aktiengesellschaft Process for leaching of precious metals
US5364453A (en) * 1992-09-22 1994-11-15 Geobiotics, Inc. Method for recovering gold and other precious metals from carbonaceous ores
US7282080B2 (en) * 2002-04-11 2007-10-16 Plattech Pty Ltd Process for extracting platinum group metals

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4441993A (en) * 1975-11-03 1984-04-10 Fluor Corporation Flotation process
US4710361A (en) * 1983-01-14 1987-12-01 Ostrea Antonio M Gold recovery by sulhydric-fatty acid flotation as applied to gold ores/cyanidation tailings
US5336474A (en) * 1990-06-02 1994-08-09 Degussa Aktiengesellschaft Process for leaching of precious metals
US5364453A (en) * 1992-09-22 1994-11-15 Geobiotics, Inc. Method for recovering gold and other precious metals from carbonaceous ores
US7282080B2 (en) * 2002-04-11 2007-10-16 Plattech Pty Ltd Process for extracting platinum group metals

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102002587A (zh) * 2010-11-10 2011-04-06 紫金矿业集团股份有限公司 一种难处理金精矿生物氧化渣氰化提金方法
CN103620064B (zh) * 2011-04-20 2015-08-26 安东尼奥·M·奥斯特尔 从混合氧硫化物铜矿石中回收金和铜的方法
CN103620064A (zh) * 2011-04-20 2014-03-05 安东尼奥·M·奥斯特尔 从混合氧硫化物铜矿石中回收金和铜的方法
US8871162B2 (en) 2011-04-20 2014-10-28 Antonio M. Ostrea Process of gold and copper recovery from mixed oxide—sulfide copper ores
WO2012053915A1 (fr) 2011-04-20 2012-04-26 Ostrea Antonio M Procédé de récupération d'or et de cuivre à partir de minerais mixtes de cuivre oxydé-sulfuré
AU2011318686B2 (en) * 2011-04-20 2017-02-02 Antonio M. Ostrea A process of gold and copper recovery from mixed oxide - sulfide copper ores
CN104745833A (zh) * 2013-12-25 2015-07-01 北京有色金属研究总院 一种用于高泥金矿石的处理工艺
CN104451122A (zh) * 2015-01-01 2015-03-25 长春黄金研究院 一种加热钝化预处理浸出工艺
CN107876206A (zh) * 2017-11-23 2018-04-06 山东九曲圣基新型建材有限公司 一种完全利用黄金尾矿的方法
CN111719050A (zh) * 2020-07-07 2020-09-29 昆明理工大学 一种综合回收锌浸出渣中水溶锌和银的方法
CN112853115A (zh) * 2020-12-30 2021-05-28 浙江遂昌汇金有色金属有限公司 高效炼金工艺
CN113151688A (zh) * 2021-04-06 2021-07-23 兰州有色冶金设计研究院有限公司 一种含金矿提金协同处理氰化尾渣的方法及系统
CN113736997A (zh) * 2021-09-07 2021-12-03 山东国大黄金股份有限公司 一种硫酸协同处理氰化尾渣脱氰浮选回收金银的方法

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