Flotation of germanium n and p with potassium ethyl xanthate |
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| Authors: | MM Kielkowska J Lekki J Drzymala |
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| Institution: | 1. Silesian Technical University, Gliwice Poland;2. Technical University of Wroclaw Poland |
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| Abstract: | Steady-state potential of the germanium electrode, flotation tests and results of spectrophotometric ATR (Attenuated Total Reflection) measurements of germanium surface in the presence and absence of potassium ethyl xanthate are presented.On the basis of the steady-state potentials of the germanium electrode in ethyl xanthate solutions, the standard potential E0 of the reaction: Ge + 2EtX? = Ge (EtX)2 + 2e is estimated. The pH ranges of the dixanthogen (EtX)2 and the germanium xanthate Ge(EtX)2 species predominance in the bulk solution are calculated. It has been established that flotation of germanium is greater than the natural floatability (in the absence of collectors) in the pH ranges where (EtX)2 or Ge (EtX)2 are present in the bulk solution. Spectrophotometric results reveal the presence of (EtX)2 and Ge (EtX)2 on the surface in the same pH ranges as is calculated for the bulk reactions.No significant differences in the surface properties and the flotation behaviour between germanium n and p have been found. |
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