Determination of preferential adsorption of Depramin® on mineral surfaces by ToF-SIMS

  • Smeink R
  • Van Leerdam G
  • Mahy J
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Abstract

Selective adsorption of mining chemicals on specific ore minerals is desirable for efficient flotation. This paper reports on a feasibility study to localise and visualise the distribution of Depramin®, a polymeric depressant, produced by Akzo Nobel on a real ore at realistic depressant loadings. The combined use of bulk and micro-analytical techniques has been very useful. Bulk mineralogy determination by XRD can be correlated with data obtained by the well-developed SEM/EDX technique for local quantitative mineral classification. Starting from that basis, the potential of local mineral classification by the less established, surface sensitive, technique ToF-SIMS has been demonstrated. Although this is a qualitative analysis technique, in addition to mineral classification, ToF-SIMS is also able to identify depressants locally on ore phases at realistic bulk concentrations. Bulk depletion analysis results serve to "quantify" the surface analytical ToF-SIMS spectra. Supporting advanced data analysis tools, including principal component analysis (PCA) and spectral image processing, are important for the analysis of the correlation between data obtained from different techniques. © 2004 Elsevier Ltd. All rights reserved.

Author-supplied keywords

  • Flotation depressants
  • Flotation reagents
  • Froth flotation
  • Ore mineralogy
  • Process instrumentation

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Authors

  • R. G. Smeink

  • G. C. Van Leerdam

  • J. W G Mahy

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