copper Extraction Refractory Gold Process

Sucessful Case

Read More
  • Treatment of a refractory gold—copper sulfide

    The proposed leaching approach significantly reduces the cyanide consumption by at least 75% and most of the copper is present as cupric glycinate in the final leach solution. In addition, gold, silver and copper extraction was higher than the conventional cyanidation process utilising similar cyanide dosages for all the gold-copper sources

  • Treatment of a refractory gold—copper sulfide

    2001-6-1 · Treatment of a refractory gold-copper sulfide concentrate by copper ammoniacal thiosulfate leaching influence of milling on gold extraction 80 10 20 0 Influence of milling an elkw extraction 10.811 +o.sAA to.6AIM sahib -x-O.BAA unWfbd rofnO Oc -T-h I I 20 10 80 80 Lwehina limo (Hm) 100 80 80 70 60 60 x 10 30 zo 10 0 +0.6AA + wMb -X-0.9AA uObd

  • Processing of refractory gold ores ScienceDirect

    1991-1-1 · Minerals Engineering, Vol. 4, Nos 7-1 I, pp. 1029-1041, 1991 0892-6875/91 $3.00 + 000 Printed in Great Britain 1991 Pergamon Press plc PROCESSING OF REFRACTORY GOLD ORES K.S. FRASER, R.H. WALTON and J.A. WELLS Kilborn Limited, 2200 Lake Shore Blvd. West, Toronto, Ontario MSV IA4, Canada ABSTRACT During the last ten years, increasing

  • Refractory Gold Ore Treatment Methods

    2016-7-14 · Metallurgical ContentGold Leaching & Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from

  • Gold-PM Conference

    2017-6-28 · involved copper, gold/silver, nickel/cobalt, uranium and base metals. SELECTING THE BEST PROCESS FOR THE TREATMENT OF A REFRACTORY GOLD ORE BARRICK’S : EXPERIENCE 2 A PRELIMINARY EVALUATION OF ALKALINE GLYCINE AS AN ALTERNATIVE TO CYANIDE FOR GOLD EXTRACTION 152 Mike Dry, Arithmetek Inc.

  • Establishing thE ProcEss MinEralogy of gold orEs

    cyanidation. Acceptable extraction of refractory gold can only be achieved by employing a pre-oxidation process prior to cyanide leaching. Antimony, bismuth sulfide and telluride gold ores: Antimony, bismuth sulfide and telluride gold ores are often somewhat refractory due to the presence of slow-dissolving gold minerals such as aurostibite

  • Review Pretreatment Process on Refractory Gold Ores

    1) Arsenic-bearing refractory gold ore has stones extremely difficult to deal with. In the stones, gold is locked up in arsenic mineral matrix as the form of microscopic or submicroscopic lattice. If use conventional cyanidation gold extraction process, the gold leaching rate is very low. Because gold in such ores is very fine particle

  • Biooxidation‒thiosulfate leaching of refractory gold

    2019-7-21 · A process of biooxidation followed by thiosulfate leaching of gold from refractory gold concentrate was investigated. Mineralogical studies on the concentrate showed that very fine gold grains (<10 μm) were encapsulated in pyrite and arsenopyrite, while the proportion of monomer gold was only 21%. The gold-bearing sample was identified as a high-sulfur fine-sized

  • Gold Extraction & Recovery Processes

    2016-2-29 · If the solution is rich enough can be treated by zinc powder and the precipitated obtained (cement) obtained will be sent to retorting and smelting. For gold extraction the strength of cyanide solution ranges from 0.01 to 0.05%. Lime

  • EXTRACTION METHODS FROM REFRACTORY ORES TCM

    The present invention relates to a process for extraction and separation of gold, silver and other metals from refractory ores, concentrates and tailings with minimum removal of arsenic. BACKGROUND. In refractory gold ores, concentrates and tailings, gold is usually locked up in siliceous, carbonaceous, sulphide and arsenosulphide compounds.

  • (PDF) The KellGold hydrometallurgical process for cyanide

    The process has been successfully tested on various sulfide flotation concentrates, including various primary PGM, refractory gold-silver, copper-gold and polymetallic concentrates.

  • (PDF) Treatment of a Copper-Rich Gold Ore by Ammonia

    extraction of gold from 12.3% to 98.2%, apparently due to the removal of easily soluble copper present in the ore. It also allowed the reduction of cyanide consumption by 52%. Ammoniacal cyan ide

  • Gold-PM Conference

    2017-6-28 · involved copper, gold/silver, nickel/cobalt, uranium and base metals. SELECTING THE BEST PROCESS FOR THE TREATMENT OF A REFRACTORY GOLD ORE BARRICK’S : EXPERIENCE 2 A PRELIMINARY EVALUATION OF ALKALINE GLYCINE AS AN ALTERNATIVE TO CYANIDE FOR GOLD EXTRACTION 152 Mike Dry, Arithmetek Inc.

  • OXIDATION OF REFRACTORY GOLD CONCENTRATES

    2013-7-9 · copper ions catalyze the dissolution of gold in the thiosulfate solutions in the absence of ammonia. The leaching experiments also have shown that gold may dissolve in alkaline thioarsenite solutions, which provides a possible new process option for the leaching of gold. The oxidation of refractory arsenical gold concentrates in aerated alkaline

  • The leaching and adsorption behaviour of gold ores

    2020-8-28 · gold was completely extracted by cyanide alone. The flotation feed and copper concentrate showed an enhancement in gold extraction due to the activated carbon adsorbing gold that would otherwise have been preg-robbed. However, this mechanism did not explain the behaviour of the pyrite concentrate. For this ore the

  • Biooxidation-thiosulfate leaching of refractory gold

    2020-8-15 · A process of biooxidation followed by thiosulfate leaching of gold from refractory gold concentrate was investigated. Mineralogical studies on the concentrate showed that very fine gold grains (<10 µm) were encapsulated in pyrite and arsenopyrite, while the proportion of monomer gold was only 21%. The gold-bearing sample was identified as a high-sulfur fine-sized

  • PRESSURE LEACHING RPMGlobal

    2020-1-22 · constructed in 1954, primarily to process complex copper-nickel-cobalt ores. The process consists of a series of pressure leach vessels to oxidatively leach nickel and copper in an ammonium lixiviant. Figure 2: General flowsheet of processing refractory gold

  • Review Pretreatment Process on Refractory Gold Ores

    1) Arsenic-bearing refractory gold ore has stones extremely difficult to deal with. In the stones, gold is locked up in arsenic mineral matrix as the form of microscopic or submicroscopic lattice. If use conventional cyanidation gold extraction process, the gold leaching rate is very low. Because gold in such ores is very fine particle

  • Chapter 6 Copper Production Technology

    1996-11-20 · hydrometallurgical 2 copper production. Tables 6-1 and 6-2 provide capsule summaries of these processes. 1 PyrometaIIurgy IS the extractIon of metaI from ores anD concen-trates using chemical reactions at high temperatures. 2 Hydrometallurgy is the recovery of metaIs from ores using water-based solutions. As early as 6000 B. C., native copper

  • Copper Extraction Refractory Gold Processes

    Copper Extraction Refractory Gold Processes. copper extraction refractory gold processes A Verified CN Gold Supplier on copper extraction refractory gold processes Live Chat Plating on Refractory Metals Plating with Refractory Plating With Refractory and Other Exotic Metals Electroplating is a process used to provide a protective coating onto the surface of an

  • EXTRACTION METHODS FROM REFRACTORY ORES TCM

    The present invention relates to a process for extraction and separation of gold, silver and other metals from refractory ores, concentrates and tailings with minimum removal of arsenic. BACKGROUND. In refractory gold ores, concentrates and tailings, gold is usually locked up in siliceous, carbonaceous, sulphide and arsenosulphide compounds.

  • (PDF) Treatment of a Copper-Rich Gold Ore by Ammonia

    extraction of gold from 12.3% to 98.2%, apparently due to the removal of easily soluble copper present in the ore. It also allowed the reduction of cyanide consumption by 52%. Ammoniacal cyan ide

  • Biooxidation-thiosulfate leaching of refractory gold

    2020-8-15 · A process of biooxidation followed by thiosulfate leaching of gold from refractory gold concentrate was investigated. Mineralogical studies on the concentrate showed that very fine gold grains (<10 µm) were encapsulated in pyrite and arsenopyrite, while the proportion of monomer gold was only 21%. The gold-bearing sample was identified as a high-sulfur fine-sized

  • The leaching and adsorption behaviour of gold ores

    2020-8-28 · gold was completely extracted by cyanide alone. The flotation feed and copper concentrate showed an enhancement in gold extraction due to the activated carbon adsorbing gold that would otherwise have been preg-robbed. However, this mechanism did not explain the behaviour of the pyrite concentrate. For this ore the

  • OXIDATION OF REFRACTORY GOLD CONCENTRATES

    2013-7-9 · copper ions catalyze the dissolution of gold in the thiosulfate solutions in the absence of ammonia. The leaching experiments also have shown that gold may dissolve in alkaline thioarsenite solutions, which provides a possible new process option for the leaching of gold. The oxidation of refractory arsenical gold concentrates in aerated alkaline

  • Review Pretreatment Process on Refractory Gold Ores

    1) Arsenic-bearing refractory gold ore has stones extremely difficult to deal with. In the stones, gold is locked up in arsenic mineral matrix as the form of microscopic or submicroscopic lattice. If use conventional cyanidation gold extraction process, the gold leaching rate is very low. Because gold in such ores is very fine particle

  • Minerals Engineering International Online Commodities

    2021-9-27 · S. Ayata, H. Yildiran, Copper extraction from gold bearing copper(II) sulphide without thermal process to obtain gold concentrate, Minerals Engineering, Vol.18 No.8, 2005 L. Curreli, M. Ghiani, M. Surracco, G. Orru, Beneficiation of a gold bearing enargite ore by flotation and As leaching with Na-hypochlorite,Minerals Engineering,Vol.18 No

  • Chapter 6 Copper Production Technology

    1996-11-20 · hydrometallurgical 2 copper production. Tables 6-1 and 6-2 provide capsule summaries of these processes. 1 PyrometaIIurgy IS the extractIon of metaI from ores anD concen-trates using chemical reactions at high temperatures. 2 Hydrometallurgy is the recovery of metaIs from ores using water-based solutions. As early as 6000 B. C., native copper

  • Copper Leaching Method Metallurgist & Mineral

    2019-4-19 · Copper Leaching Practices. For centuries small amounts of copper have been recovered from acid mine-drainage waters. In recent years, the expansion of copper-bearing waste dump leaching for copper recovery has established a technological basis that is rapidly converting the art of copper leaching into a science.