Institute of Integrated Mineral Development – IPKON, Russian Academy of Sciences, Moscow, Russia:

I. Zh. Bunin, Leading Researcher, Doctor of Engineering Sciences, Candidate of Physico-Mathematical Sciences, bunin_i@mail.ru
M. V. Ryazantseva, Senior Researcher, Candidate of Engineering Sciences
A. L. Samusev, Senior Researcher, Candidate of Engineering Sciences
I. A. Khabarova, Senior Researcher, Candidate of Engineering Sciences

The main results of the theoretical and experimental studies on the directional modification of the surface phase composition as well as the structural, chemical and process properties of non-ferrous, rare and noble metals under physicochemical and pulse energy impact are presented. The main mechanisms of the surface micro- and nanophases formation for the increase in the yield and quality of concentrates during processing of rebellious ore with the complex material constitution are revealed. The rational parameters and conditions for preliminary treatment of sulfide minerals by high-power (high-voltage) nanosecond electromagnetic pulses in order to increase the flotation separation selectivity of sulphides with the similar physicochemical properties, such as pyrite–arsenopyrite, pyrrhotite–pentlandite and chalcopyrite–sphalerite, due to contrast changes in the chemical and phase surface composition, hydrophobicity, sorption activity and floatability of minerals, are determined and experimentally proved. The high efficiency of application of the pulsed energy impact and electrochemically treated water systems is demonstrated in terms of the directional change in the properties of rock-forming minerals of kimberlites and preservation of diamond crystals during milling. The described results confirm the effectiveness of the electrochemical treatment application to mineral suspensions and aqueous systems under leaching of sulphide copper–zinc ore and rebellious gold-bearing concentrate.
The study has been supported by the Academician Chanturia School, Grant NSH-7608.2016.5.
The authors appreciate participation of Candidate of Engineering Sciences V. G. Minenko, Candidate of Geologo-Mineralogical Sciences E. V. Koporulina, Candidate of Engineering Sciences E. S. Zhuravleva and Leading Engineer N. E. Anashkina, IPKON RAS.

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