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Influence of the surface charge of sulfide minerals on sorption of the collector and the change in the contact angle

  • Physical and Chemical Principles of Benefication
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Conclusions

  1. 1.

    Sorption of xanthate on sulfide minerals depends on the surface charge. Chalcopyrite, cosalite, and activated sphalerite exhibit two xanthate sorption maxima in the range of positive values of the surface charge, owing to the presence of binary salts.

    Maximum sorption of the collector on metallic and native bismuth is observerved at markedly different potentials (at −25 and +50 mV, respectively).

  2. 2.

    Detachment of air bubbles and a toluene drop from mineral surfaces takes place during cathodic polarization. The value of the polarization potential necessary for removal of the air bubble (toluene drop) depends on the amount of collector and the nature of the mineral. An air bubble is not detached from the surface of sphalerite, even at high polarization potentials (\t-1900 mV), owing to the absence of a change in the state of the absorption layer.

  3. 3.

    The difference between the maximum xanthate sorption potentials for bismuthinite (+175 mV) and chalcopyrite (+225 mV) and the presence of a wide range of increased sorption potentials for cosalite (200\2-250 mV) should be utilized for selective separation of these minerals.

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Authors
  1. P. M. Solozhenkin
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  2. E. S. Sokolov
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  3. N. I. Kopitsya
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Additional information

Institute of Chemistry, Academy of Sciences of the TadzhSSR, Dushanbe. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 104–110, January–February, 1969.

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Solozhenkin, P.M., Sokolov, E.S. & Kopitsya, N.I. Influence of the surface charge of sulfide minerals on sorption of the collector and the change in the contact angle. Soviet Mining Science 5, 81–85 (1969). https://doi.org/10.1007/BF02501714

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  • DOI: https://doi.org/10.1007/BF02501714

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