Composition and structure of the shells of aluminosilicate microspheres in fly ash formed on the combustion of Ekibastuz coal

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.3103/S0361521916040030

Ключевые слова: Coal, Coal ash, Combustion, Fly ash, Kaolinite, Phase composition, Silicate minerals, Average diameter, Chemical and phase compositions, Fly ash cenospheres, Mineral precursor, Narrow fractions, Network structures, Spherical globules, Systematic study, Coal combustion

Аннотация: A systematic study of the chemical and phase composition and structure of the shells of narrow fractions of nonmagnetic cenospheres separated from a concentrate of fly ash cenospheres from the combustion of pulverized SS (weakly caking coal) coal from the Ekibastuz Basin was carried out. It was found that the separated narrow fractions were characterized by a high Al2O3 content of 33-38 wt %. The phase composition included 57-73 wt % vitreous phase, 25-40 wt % mullite, and 1.2-2.5 wt % quartz. An increase in the average diameter, thickness, and porosity of the glass-crystalline shell of globules with the concentration of aluminum was observed. Globules of the following two types were identified in the obtained fractions: spherical globules with an annular structure and foamy globules with a network structure formed from different illite and kaolinite mineral precursors, respectively.

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Издание

Журнал: SOLID FUEL CHEMISTRY

Выпуск журнала: Vol. 50, Is. 4

Номера страниц: 238-247

ISSN журнала: 03615219

Место издания: NEW YORK

Издатель: ALLERTON PRESS INC

Авторы

  • Fomenko E.V. (Institute of Chemistry and Chemical Technology,Siberian Branch,Russian Academy of Sciences)
  • Anshits N.N. (Institute of Chemistry and Chemical Technology,Siberian Branch,Russian Academy of Sciences)
  • Vasil'eva N.G. (Institute of Chemistry and Chemical Technology,Siberian Branch,Russian Academy of Sciences)
  • Rogovenko E.S. (Institute of Chemistry and Chemical Technology,Siberian Branch,Russian Academy of Sciences)
  • Mikhaylova O.A. (Institute of Chemistry and Chemical Technology,Siberian Branch,Russian Academy of Sciences)
  • Mazurova E.V. (Institute of Chemistry and Chemical Technology,Siberian Branch,Russian Academy of Sciences)
  • Solovyev L.A. (Institute of Chemistry and Chemical Technology,Siberian Branch,Russian Academy of Sciences)
  • Anshits A.G. (Siberian Federal University)

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