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  • The selective leaching of copper from a gold–copper

    The selective leaching of copper from a gold–copper concentrate in glycine solutions E.A. Oraby, J.J. Eksteen⁎ Western Australian School of Mines, Curtin University, GPO Box U1987, Perth, WA 6845, Australia article info abstract Article history: Received 6 May 2014 Received in revised form 25 August 2014 Accepted 1 September 2014 Available online 18 September 2014 Keywords: Copper Gold

  • US Patent for Leaching process for copper concentrates

    A method of leaching copper from copper sulphide-containing concentrates, such as chalcopyrite, includes using pyrite as a catalyst for ferric reduction in order to eliminate passivation of the chalcopyrite surface, the process being carried out under conditions whereby the pyrite is not materially oxidized, for example by maintaining the operating solution potential at a suitable level.

  • Copper leaching from chalcopyrite concentrates

    These processes recover copper via hydrometallurgical leaching of the copper component of chalcopyrite concentrates, followed by solvent extraction and electrowinning. A number of demonstration plant operations have been conducted, but as of this writing none of the processes have become completely commercially operational. Keywords Chalcopyrite Jarosite Copper Cathode Ferric

  • DEVELOPMENT OF A GLYCINE-CYANIDE LEACH PROCESS FOR

    DEVELOPMENT OF A GLYCINE-CYANIDE LEACH PROCESS FOR GOLD-COPPER CONCENTRATE By 1Brigitte Seaman, 2Tim Newton, 3Elsayed Oraby 1Newcrest Mining Limited, Australia 2Mining and Process Solutions, Australia 3Curtin University, Australia Presenter and Corresponding Author Brigitte Seaman [email protected] ABSTRACT The GlyCatTM process offers a simple and

  • Hydrometallurgical considerations in processing arsenic

    Hydrometallurgical considerations in processing arsenic-rich copper concentrates *Henry Salomon-de-Friedberg1 and Keith Mayhew1, Figure 1 CESL Copper Process Flowsheet Concentrate is first reground prior to leaching at 150°C and 14 bar pressure. Retention time in the leach vessel is in the range of 60 to 90 minutes to promote complete oxidation of the copper sulphide minerals and to

  • Copper chloride leaching from chalcopyrite and bornite

    In the Intec copper process, copper concentrates are leached in a NaCl-NaBr solution at 80–85 °C during four-stage countercurrent leaching using Cu 2+, O 2 and BrCl 2-as oxidants (Moyes et al., 2000). Iron is leached and re-precipitated as goethite during the first three stage leaching. Copper is recovered by electrowinning from copper chloride/bromide solution in a diaphragm cell. The

  • Leaching process for copper concentrates The University

    08/12/2005· A method of leaching copper from copper sulphide-containing concentrates, such as chalcopyrite, includes using pyrite as a catalyst for ferric reduction in order to eliminate passivation of the chalcopyrite surface, the process being carried out under conditions whereby the pyrite is not materially oxidized, for example by maintaining the operating solution potential at a suitable level.

  • Pressure Leaching of Copper Concentrates

    Pressure Leaching of Copper Concentrates John O. Marsden Senior Vice President –Technology & Product Development. 2 October 25th, 2004 Presentation Outline Safety share Introduction Global copper reserves/resources Phelps Dodge production & reserves profile Commercial drivers for copper concentrate leaching The copper concentrate market and TC/RCs Phelps Dodge copper pressure leaching

  • Leaching process for copper concentrates The

    07/12/2010· A method of leaching copper from copper sulphide-containing concentrates, such as chalcopyrite, includes using pyrite as a catalyst for ferric reduction in order to eliminate passivation of the chalcopyrite surface, the process being carried out under conditions whereby the pyrite is not materially oxidized, for example by maintaining the operating solution potential at a suitable level.

  • US3949051A Hydrometallurgical process for extracting

    A process for extracting copper from a copper-containing concentrate by comminuting the concentrate in the presence of a liquid dispersing agent which inhibits agglomeration and forms a pulp, and leaching the pulp in the presence of a silver catalyst.

  • US Patent Application for Leaching process for copper

    Leaching process for copper concentrates . Jun 1, 2005 The University of British Columbia. A method of leaching copper from copper sulphide-containing concentrates, such as chalcopyrite, includes using pyrite as a catalyst for ferric reduction in order to eliminate passivation of the chalcopyrite surface, the process being carried out under conditions whereby the pyrite is not materially

  • US7846233B2 Leaching process for copper

    A method of leaching copper from copper sulphide-containing concentrates, such as chalcopyrite, includes using pyrite as a catalyst for ferric reduction in order to eliminate passivation of the chalcopyrite surface, the process being carried out under conditions whereby the pyrite is not materially oxidized, for example by maintaining the operating solution potential at a suitable level.

  • Recover Cobalt & Copper from Sulfide Concentrates

    The process comprises (1) oxidative pressure leaching of the flotation concentrate in an oxygen atmosphere at 195° C, (2) precipitation of the major portion of the iron and arsenic as sodium jarosite, (3) neutralization of the filtrate from jarosite precipitation to remove the last traces of iron and arsenic as ferric-arsenate precipitate, (4) recovery of copper from the iron- and arsenic

  • Big Guns in Copper Conc Leaching Race altamet.au

    ALTA Free stone BIG GUNS NOW IN COPPER CONCENTRATE LEACHING RACE A growing list of hydrometallurgical processes are lining up to seize the ultimate prize in copper processing, the treatment of primary sulphide concentrates, out of the hands of the incumbent smelters. The serious entry of copper giants Phelps Dodge, BHP Billiton and Codelco indicate that at long last real progress is being

  • Acid Leaching Copper Flotation Concentrate

    As an alternative to Acid Leaching, Copper Chalcopyrite (CuFeS2) concentrates are processed traditionally by smelting, which results in sulfur dioxide (SO2) emissions. The development of a hydrometallurgical process for recovery of metals from concentrates of Cu ores offers industry a low-cost, low-pollution alternative to the traditional pyrometallurgical practices. The hydrometallurgical

  • Albion process Wikipedia

    The Albion process is an atmospheric leaching process for processing zinc concentrate, refractory copper and refractory gold. The process is important because it is the most cost-effective method currently in use for extracting both the zinc and lead from concentrates that contain high lead levels (7% or greater). Zinc and lead often occur together and large remaining zinc deposits contain

  • Low grade ores Smelt, leach or concentrate?

    Steen and Borg (2002) estimated the cost of producing metal concentrates by heap leaching of the earth’s crust containing 0.002% copper and 0.001% nickel (amongst other metals) and found it to be orders of magnitude greater than current costs of producing concentrates from metallic ores.