Physico-Chemical Characteristics of Shungite Rock of Kazakhstan

Sergey Efremov, Sergey Nechipurenko, Maira Kuttybayevna Kazankapova, W. Washington, Kh. S. Tassibekov, Mikhail Nauryzbayev

2013

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DOI 10.18321/ectj228
Data confidence 70 medium
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Abstract

Physico-chemical characteristics of shugite rocks of Kazakhstan (Bakyrchik deposit) were studied usingthe methods of elementary analysis, IR-spectroscopy, scanning electron microscopy, Raman spectroscopyand X-ray phase analysis. The content of carbon in shungite rock was determined to be from 3% to 19 %.The flotation technology for shungite rocks of Kazakhstan was developed, the content of carbon in theconcentrate reaching 40.0%. When studying the elemental composition, the mineral part of shungite rockswas stated to be presented, mainly, by silicon, aluminium, calcium, magnesium, potassium, sodium, ironand titanium oxides. IR-spectroscopic investigations showed that in the concentrate, apart from polycyclichydrocarbons containing methylene groups, there appeared carboxyl groups. The results of scanningelectron microscopy (SEM) showed that flotation and thermal activation of shungite rocks on carbon allowobtaining a more developed surface structure and porosity. The structure of shungite carbon was shown bythe method of Raman scattering to be close to that of glassy carbon. The results of X-ray diffraction analysis(XRD) of natural shungite rocks showed that the samples under study contained a carbonaceous substanceand a number of mineral components: quartz, illite, bassanite, burgerite, muscovite. It is shown that shungitecarbon of “Bakyrchik” deposit is identical to shungite of Zazhogino deposit in Russia. The stated physicochemical characteristics allow to determine the directions of the use of carbon concentrate for solution of ecological and technological problems.