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Surface Analytical Studies of Oxidation and Collector Adsorption in Sulfide Mineral Flotation

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Solid—Liquid Interfaces

Part of the book series: Topics in Applied Physics ((TAP,volume 85))

Abstract

The physical and chemical forms of sulfide mineral surfaces are reviewed. The initial surfaces and oxidation products have been studied by Scanning Auger Microscopy (SAM), X-ray Photoelectron Spectroscopy (XPS), Scanning Tunneling Microscopy (STM), Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM) and Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS). Changes to surface speciation as a function of time, pH, Eh and collector adsorption, related to mineral flotation, have been followed with these techniques. Oxidation products are formed in different processes, namely: metal_de ficient sulfides, polysulfides and sulfur; oxidized fine sulfide particles; colloidal hydroxide particles and flocs; continuous surface layers (e.g. hydroxide, oxyhydroxide, oxide species) of varying depth; sulfate and carbonate species; isolated, patchwise and face-specific oxide, hydroxide and hydroxycarbonate development. The actions of collector molecules (e.g. xanthates, dithiophosphinates) have been identified in several modes, namely: adsorption to specific surface sites; colloidal precipitation from solution; detachment of small sulfide particles from larger particle surfaces; detachment of small oxide/hydroxide particles; removal of adsorbed and amorphous oxidized surface layers; inhibition of oxidation; disaggregation of larger particles; and patchwise or face-specific coverage. The different modes of oxidation and collector action are exemplified using case studies from the literature and recent research.

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Authors and Affiliations

  1. Ian Wark Research Institute, The Commonwealth ARC Special Research Centre in Particle and Material, University of South Australia, The Levels Campus, Mawson Lakes, South Australia, 5095, Australia

    Roger S. C. Smart, John Amarantidis, William M. Skinner, Clive A. Prestidge, Lori La Vanier & Stephen R. Grano

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  1. Roger S. C. Smart
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  2. John Amarantidis
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  3. William M. Skinner
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  4. Clive A. Prestidge
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  5. Lori La Vanier
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  6. Stephen R. Grano
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  1. Institut für Physikalische Chemie, Universität Bonn, Wegelerstr. 12, 53115, Bonn, Germany

    Klaus Wandelt

  2. School of PSET, Murdoch University, South Sreet, Murdoch, 6150, WA, Australia

    Stephe Thurgate

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Smart, R.S.C., Amarantidis, J., Skinner, W.M., Prestidge, C.A., La Vanier, L., Grano, S.R. (2003). Surface Analytical Studies of Oxidation and Collector Adsorption in Sulfide Mineral Flotation. In: Wandelt, K., Thurgate, S. (eds) Solid—Liquid Interfaces. Topics in Applied Physics, vol 85. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44817-9_1

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