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The mechanism ofIron sulfide minerals the influence exerted by electromagnetic-pulse impacts of two types (high-voltage nanosecond electromagnetic pulses and dielectric-barrier discharge in air at atmospheric pressure) on the morphology, structural and physical–chemical properties of natural iron sulfide mineralsIron sulfide minerals (pyrrhotite, pyritePyrite and arsenopyrite) has been investigated and explored here. The study aims to establish a relationship between the pulsed plasma-chemical treatment parameters with the physicochemicalPhysicochemical and flotationFlotation properties of sulfide mineralsMineral. We used the methods of analytical electron microscopy, Fourier transform infrared spectroscopy, potentiometric titration (electrode potentialElectrode potential), acid–base adsorptionAdsorption indicators from an aqueous medium (Hammet indicator method), microhardness, sorptionSorption and flotationFlotation tests. For pyrrhotite, the greatest changes in the electrode potentialElectrode potential were found at pH 9.5–12 and for the mode of short-term (ttreat = 10 s) plasma treatment of the mineralMineral: a potential shift towards negative values (–60 mV) was observed, which predetermines the effect of reducing the sorptionSorption and flotationFlotation activity of pyrrhotite. Using the Hammet indicator method, we found that plasma treatment strengthens acceptor properties and weakens electron donor properties of pyritePyrite surface, as well as weakens acceptor properties of arsenopyrite. Adsorptive properties of pyritePyrite relative to the electron-donor butyl xanthateXanthate grow, and, consequently, flotationFlotation activity of the mineralMineral improves. In case of arsenopyrite, the adsorptive properties and flotationFlotation activity decrease. The advantages of the short-term (ttreat = 10–30 s) energy impacts applying for structural and chemical modificationChemical modification of the surface and physical–chemical properties of iron sulfide mineralsIron sulfide minerals in order to improve the efficiency of processing of low-grade copperCopper-nickel and refractory pyritePyrite-arsenopyrite gold-bearing ores.

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The Effect of Low-Temperature Atmospheric Discharge Plasma on the Physical–Chemical and Technological Properties of Iron Sulfide Minerals

  • 会议论文

  • 发表日期：

    2025年

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  • Igor Zh. Bunin,
  • Irina A. Khabarova,
  • Maria V. Ryazantseva

摘要

The mechanism ofIron sulfide minerals the influence exerted by electromagnetic-pulse impacts of two types (high-voltage nanosecond electromagnetic pulses and dielectric-barrier discharge in air at atmospheric pressure) on the morphology, structural and physical–chemical properties of natural iron sulfide mineralsIron sulfide minerals (pyrrhotite, pyritePyrite and arsenopyrite) has been investigated and explored here. The study aims to establish a relationship between the pulsed plasma-chemical treatment parameters with the physicochemicalPhysicochemical and flotationFlotation properties of sulfide mineralsMineral. We used the methods of analytical electron microscopy, Fourier transform infrared spectroscopy, potentiometric titration (electrode potentialElectrode potential), acid–base adsorptionAdsorption indicators from an aqueous medium (Hammet indicator method), microhardness, sorptionSorption and flotationFlotation tests. For pyrrhotite, the greatest changes in the electrode potentialElectrode potential were found at pH 9.5–12 and for the mode of short-term (ttreat = 10 s) plasma treatment of the mineralMineral: a potential shift towards negative values (–60 mV) was observed, which predetermines the effect of reducing the sorptionSorption and flotationFlotation activity of pyrrhotite. Using the Hammet indicator method, we found that plasma treatment strengthens acceptor properties and weakens electron donor properties of pyritePyrite surface, as well as weakens acceptor properties of arsenopyrite. Adsorptive properties of pyritePyrite relative to the electron-donor butyl xanthateXanthate grow, and, consequently, flotationFlotation activity of the mineralMineral improves. In case of arsenopyrite, the adsorptive properties and flotationFlotation activity decrease. The advantages of the short-term (ttreat = 10–30 s) energy impacts applying for structural and chemical modificationChemical modification of the surface and physical–chemical properties of iron sulfide mineralsIron sulfide minerals in order to improve the efficiency of processing of low-grade copperCopper-nickel and refractory pyritePyrite-arsenopyrite gold-bearing ores.