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    Leaching of a low-grade, copper-nickel sulfide ore: 2. Impact of aeration and pH on Cu recovery during abiotic leaching

    133607_133607.pdf (220.4Kb)
    Access Status
    Open access
    Authors
    Maley, Mark
    Van Bronswijk, Wilhelm
    Watling, H.
    Date
    2009
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Maley, M. and Van Bronswijk, W. and Watling, H.R. 2009. Leaching of a low-grade, copper-nickel sulfide ore: 2. Impact of aeration and pH on Cu recovery during abiotic leaching. Hydrometallurgy. 98 (1-2): pp. 66-72.
    Source Title
    Hydrometallurgy
    DOI
    10.1016/j.hydromet.2009.03.016
    ISSN
    0304386X
    Faculty
    Faculty of Health Sciences
    School of Public Health
    School
    Department of Chemistry
    Remarks

    The link to the journal’s home page is: http://www.elsevier.com/wps/find/journaldescription.cws_home/503336/description#description. Copyright © 2009 Elsevier B.V. All rights reserved

    URI
    http://hdl.handle.net/20.500.11937/47214
    Collection
    • Curtin Research Publications
    Abstract

    The conditions under which copper was retained and re-distributed in a test heap of pyrrhotite-rich, copper-nickel sulfide ore were investigated in abiotic column leaching tests. It was determined that acidity plays a key role in maximising copper recovery. During passage through the ore bed, when the leachate pH rose to >2.3, copper ions previously released to solution through the oxidation of chalcopyrite were retained by adsorption on, or reaction with, ore minerals. Lack of aeration (limited oxygen) had only a small impact on copper recovery, in association with a favourable pH environment. Possible reaction mechanisms are discussed. The results indicated the need for careful acid management in the operation of heaps of pyrrhotite-rich ores such as complex copper-nickel sulfide ores.

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