Shungite rock processing technology

Ефремов, С. А.

doi:10.1134/s1070427210010052

Cited by 4 publications

(3 citation statements)

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“…Shungite carbon is fossilized oil or amorphous, noncrystallizable, fullerene-like (i.e. containing) certain regular structures) carbon, its content in rocks ranges from 1% to 30% also it contains aluminosilicates, alkaline metal oxides and trace amounts of noble and rare metals [1]. In rocks, shungite carbon forms a matrix in which disperse silicates with an average size of about 1 µm are uniformly distributed.…”

Section: Introductionmentioning

confidence: 99%

Physico-Chemical Characteristics of Shungite Rock of Kazakhstan

et al. 2013

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Physico-chemical characteristics of shugite rocks of Kazakhstan (Bakyrchik deposit) were studied using the methods of elementary analysis, IR-spectroscopy, scanning electron microscopy, Raman spectroscopy and 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 the concentrate reaching 40.0%. When studying the elemental composition, the mineral part of shungite rocks was stated to be presented, mainly, by silicon, aluminium, calcium, magnesium, potassium, sodium, iron and titanium oxides. IR-spectroscopic investigations showed that in the concentrate, apart from polycyclic hydrocarbons containing methylene groups, there appeared carboxyl groups. The results of scanning electron microscopy (SEM) showed that flotation and thermal activation of shungite rocks on carbon allow obtaining a more developed surface structure and porosity. The structure of shungite carbon was shown by the 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 substance and a number of mineral components: quartz, illite, bassanite, burgerite, muscovite. It is shown that shungite carbon 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.

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Section: Introductionmentioning

confidence: 99%

Physico-Chemical Characteristics of Shungite Rock of Kazakhstan

et al. 2013

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“…The obtained concentrate was subjected to heat treatment in an inert atmosphere of argon at 800 °C for 1 h and was then activated with superheated steam at temperature of 850-900 °C for 40 min, whereby specific surface area increased from 12 to 153 m 2 /g. Increase of a specific surface area was due to combustion of amorphous carbon [12].…”

Section: Preparation Of Support Based On Carbon Mineralsmentioning

confidence: 99%

“…Nauryzbayev and S.A. Yefremov developed technology for shungite processing to obtain the desired products. Shungite processing technology is built on a flexible circuit; it is environmentally friendly and waste-free [12]. Сarbon-mineral sorbents for waste and domestic water purification from heavy metal ions [13], fillers of elastomers [14], composite materials for protection against electromagnetic interference [15], etc.…”

Section: Introductionmentioning

confidence: 99%

New Supports for Carbon-Metal Catalytic Systems Based on Shungite and Carbonizates of Plant Raw Materials

et al. 2015

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<p>In this paper, new carbon containing materials based on products of shungite ore enrichment and carbonizates of plant raw materials were studied. The phase transformations occurring during the carbonization process were studied. Scanning electron microscopy (SEM) was used to visualize the surface topography. It was established that supports based on plant raw materials have more developed and homogeneous surface. Specific surface area and porosity was studied by BET (Method of Brunauer-Emmet Taylor). It was found that supports based on plant raw materials have developed microporous surface (383–480 m<sup>2</sup>/g), with predominant micropores on the surface with dimensions of 1.8–2.5 nm. The mechanical strength of the obtained supports is higher than their industrial analogs and it equals 53–91%. Conversion of methylbutynol on active centers of supports was studied. Supports based on plant raw materials have basic active sites whereby they can be used in base catalysis. Supports based on carbon-mineral raw materials possess acid and basic active sites and they can be used to prepare bidirectional type action of catalysts. Conducted research have shown the possibility of using these materials as supports for creating carbon-metal catalyst systems.</p>

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