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    Influence of grinding media and water quality on flotation performance of gold bearing pyrite

    Access Status
    Fulltext not available
    Authors
    Rabieh, Alireza
    Albijanic, Boris
    Eksteen, Jacques
    Date
    2017
    Type
    Journal Article
    
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    Citation
    Rabieh, A. and Albijanic, B. and Eksteen, J. 2017. Influence of grinding media and water quality on flotation performance of gold bearing pyrite. Minerals Engineering. 112: pp. 68-76.
    Source Title
    Minerals Engineering
    DOI
    10.1016/j.mineng.2017.07.010
    ISSN
    0892-6875
    School
    Dept of Mining Eng & Metallurgical Eng
    URI
    http://hdl.handle.net/20.500.11937/55214
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 Elsevier Ltd Flotation performance is strongly dependent on the surface properties of the constituent mineral particles, and may therefore serve as a diagnostic tool to evaluate grinding chemistry interactions. The surface properties can be altered by numerous factors such as the type of grinding media used in the preparation of the flotation feed, the presence of chemical species in the process water, and the characteristics of flotation reagents added. This paper investigates the influence of grinding media (forged steel, 18% chromium and ceramic) and water quality (tap water and synthetic process water) on floatability of gold bearing pyrite using XPS and EDTA extraction technique. The grinding of pyrite ore was performed in a Magotteaux Mill® which allowed better simulation of plant chemical conditions by controlling pH and pulp potential during the grinding. Cupric ions were added as an activator prior to the grinding. This work demonstrated that there is no significant effect of water quality on flotation performance of pyrite. The results also showed that the pyrite recovery was slightly higher when the grinding was performed with the forged steel media rather than with the chromium media or the ceramic media. XPS and EDTA extraction technique demonstrated that the forged steel media produced more iron hydroxide species than the 18% chromium or the ceramic media, indicating the high corrosion rate of the forged media. XPS technique failed to explain the influence of different grinding media on the floatability of pyrite from its ore probably due to the insensitivity of XPS technique to detect the presence of a low amount of copper species on the surface of the particles collected by flotation. The results obtained from this study confirmed that the selection of grinding media may be important to maximize pyrite recovery by flotation. The conclusions should be limited to ores low ( < 2%) in pyrite content, and where there are no reactive sulfides present other than pyrite. From an economic perspective, the marginal impacts on flotation should be balanced against grinding media wear.

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    • A review of the effects of grinding media and chemical conditions on the flotation of pyrite in refractory gold operations
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      Flotation performance of gold-bearing pyrite in refractory gold ores depend upon the interplay among process water chemistry, grinding chemistry, and ore mineralogy. The nature of pyrite itself (finely disseminated reactive ...
    • The effect of grinding chemistry on cyanide leaching of gold in the presence of pyrrhotite
      Rabieh, Alireza; Eksteen, J.; Albijanic, Boris (2017)
      In this paper, the role of grinding media type on cyanide-based gold leaching in the presence of pyrrhotite was investigated. Pyrrhotite commonly occurs in many gold ores together with pyrite and/or arsenopyrite. A synthetic ...
    • Galvanic interaction of grinding media with arsenopyrite and pyrite and its effect on gold cyanide leaching
      Rabieh, Alireza; Eksteen, Jacques; Albijanic, Boris (2017)
      © 2017 Elsevier Ltd. Galvanic interactions between different types of grinding media and arsenopyrite and pyrite, during the grinding was quantified and the effect of galvanic interactions on gold cyanide leaching was ...
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