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Conference Proceedings

Centenary of Flotation Symposium

Conference Proceedings

Centenary of Flotation Symposium

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Experimental and Calculated Flotation Kinetics of Pd-Bi-Te

Previous mineralogical investigation of all effluent flotation streams of Mimosa mine (Zimbabwe) indicated that appreciable amounts of liberated platinum-group minerals (PGMs) of the Pt-Pd-Bi-Te class are not recovered - despite electrochemical measurements showing interaction between xanthate and such minerals. In this work, the flotation recovery of synthetically prepared Pd-Bi-Te was compared with that of chalcopyrite (a typical fast-floating mineral) and pyrrhotite (a typical slow-floating mineral), with microflotation tests. These indicated Pd-Bi-Te to be a fast-floater with flotation rates exceeding that of chalcopyrite. Predicted flotation rate constants (from the Ralston model) were significantly lower for small particles (with diameters similar to those lost to the effluent streams) compared with those of particle with intermediate sizes. This supports the suggestion that losses to effluent streams are caused by particle size effects.
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  • Published: 2004
  • PDF Size: 0.198 Mb.
  • Unique ID: P200505150

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