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Journal of Mining Science

, Volume 53, Issue 4, pp 718–733 | Cite as

Modification of Structural, Chemical and Process Properties of Rare Metal Minerals under Treatment by High-Voltage Nanosecond Pulses

  • V. A. Chanturia
  • I. Zh. Bunin
  • M. V. Ryazantseva
  • E. L. Chanturia
  • I. A. Khabarova
  • E. V. Koporulina
  • N. E. Anashkina
Mineral Dressing
  • 30 Downloads

Abstract

The authors have studied the mechanism of controlled modification of composition, structure, chemistry, physicochemical and process properties of columbite, tantalite, zircon and feldspar at the meso-, micro- and nanoscales after nonthermal treatment by high-voltage nanosecond electromagnetic pulses. The studies used methods: X-ray photoelectron spectroscopy, scanning electron and atomic force microscopy, potentiometric titration, electromigration chromatography, Kelvin probe force microscopy, microhardness metering and assessment of hydrophobic behavior and flotation activity of the minerals. It is found that changes in the chemical state of atoms on the surface of minerals are mainly connected with the sequential transformation of stages in the process of formation and modification of a functional cover of mineral surface, with variation in a ratio of different type hydroxyl groups on the surface of columbite, zircon and feldspar, which conditions contrast physicochemical properties of rare metal minerals and improves selectivity of their separation by flotation.

Keywords

Columbite tantalite zircon feldspar X-ray photoelectron spectroscopy microscopy physicochemical properties electric properties flotation properties microhardness high-power electromagnetic pulses 

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • V. A. Chanturia
    • 1
  • I. Zh. Bunin
    • 1
  • M. V. Ryazantseva
    • 1
  • E. L. Chanturia
    • 1
  • I. A. Khabarova
    • 1
  • E. V. Koporulina
    • 1
  • N. E. Anashkina
    • 1
  1. 1.Academician Melnikov Institute of Integrated Mineral Development — IPKONRussian Academy of SciencesMoscowRussia

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