Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Kinetics of chalcocite leaching in oxygenated alkaline glycine solutions

    Access Status
    Fulltext not available
    Authors
    Tanda, B.
    Eksteen, Jacques
    Oraby, Elsayed
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Tanda, B. and Eksteen, J. and Oraby, E. 2018. Kinetics of chalcocite leaching in oxygenated alkaline glycine solutions. Hydrometallurgy. 178: pp. 264-273.
    Source Title
    Hydrometallurgy
    DOI
    10.1016/j.hydromet.2018.05.005
    ISSN
    0304-386X
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/68834
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 Elsevier B.V. Naturally occurring chalcocite (Cu2S) was leached with oxygenated alkaline glycine solutions. The influence of glycine concentration, stirring speed, particle size, dissolved oxygen concentration and temperature on the copper dissolution rate were evaluated. Under all conditions, the copper leach rate was very rapid in the first 6 h of leaching after which significant slower rates were recorded. The influence of fine grinding P100–20 µm was remarkable with up to 78% Cu extracted over 6 h of leaching as compared to just 40% for 38–53 µm size fraction under the same conditions. SEM-EDS and XPS analysis of the leach residue confirmed the presence of covellite (CuS) on the particle surfaces. It appears that chalcocite leaching in oxygenated alkaline glycine solution occurs in two stages. The first stage is fast and involves the conversion of chalcocite into cupric ions and covellite while in the second stage, the formed covellite slowly converts to cupric ions and sulfate ions. Kinetic analysis using the shrinking core model of both the first and second stages indicates that the reactions appear to be controlled by diffusion through the product layer with calculated apparent activation energies being 25.kJ/mol (1st stage) and 108 kJ/mol (2nd stage).

    Related items

    Showing items related by title, author, creator and subject.

    • A conceptual process for copper extraction from chalcopyrite in alkaline glycinate solutions
      Eksteen, Jacques; Oraby, E.; Tanda, B. (2017)
      A conceptual flowsheet is proposed and the main processing steps are evaluated for the alkaline processing of chalcopyrite where glycine is the complexing agent. Glycine is utilised in an oxidising, alkaline environment ...
    • The selective leaching of copper from a gold–copper concentrate in glycine solutions
      Oraby, E; Eksteen, Jacques (2014)
      The presence of copper minerals with gold is known to lead to many challenges during the cyanidation of gold ores, such as high consumption of cyanide with low gold extraction and undesirable impacts on gold recovery ...
    • An experimental evaluation of the leaching kinetics of PGM-containing Ni–Cu–Fe–S Peirce Smith converter matte, under atmospheric leach conditions
      van Schalkwyk, R.; Eksteen, Jacques; Petersen, J.; Thyse, E.; Akdogan, G. (2011)
      In a first stage atmospheric leach in a typical Sherritt Ni–Cu matte leach process, a Ni–Cu–Fe–S Peirce Smith converter matte is contacted with recycled copper spent electrolyte (an aqueous copper sulphate/sulphuric acid ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.