Библиографическое описание:Preparation of glass-ceramic materials based on dispersed PM10 microspheres of fly ash from bituminous coal combustion : научное издание / G. V. Akimochkina, L. A. Soloviev, V. V. Yumashev [et al.]. - Текст : непосредственный // Chemistry for Sustainable Development. - 2025. - Т. 33, № 6. - P. 642-651. - The work was carried out within the State Assignment for the Institute of Chemistry and Chemical Technology SB RAS - subdivision of FRC KSC SB RAS (Project No. FWES-2021-0013). - ISSN 1817-1818, DOI 10.15372/CSD2025699.
Аннотация:A detailed study of high-temperature solid-phase transformations occurring in dispersed microspheres smaller than 10 mm in size (dm = 3 mm and d<sub>99</sub> = 10 mm) belonging to the suspended matter (PM<sub>10</sub>) of fly ash from the combustion of hard coal from the Ekibastuz and Kuznetsk coal basins has been carried out within the synthesis of glass-ceramic materials. It has been established for PM<sub>10</sub> microspheres of macrocomponent composition SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>-FeO isolated as narrow fractions from fly ash from the combustion of Ekibastuz coal that there is an increase in the content of mullite phase (from 17 to 31 wt%), cristobalite phase is formed (up to 29 wt%); the content of glass phase decreases from 65 to 25 wt%. In the samples of narrow fractions of PM<sub>10</sub> microspheres from fly ashes from Kuznetsk coal combustion, crystallisation of the glass phase at 1100 °C leads to a noticeable increase in the concentration of mullite phase (from 3 to 17 wt%), the formation of cristobalite and anorthite phases (3 and 6 wt%, respectively); the amount of glass phase decreases from 93 to 70 wt%. A well-consolidated composite with low porosity (0.4 %), insignificant water absorption (0.2 %), and high strength (56 MPa) was obtained using the direct sintering method based on dispersed microspheres of PM<sub>10</sub> fly ash from the combustion of Kuznetsk coal. On the basis of dispersed microspheres of PM<sub>10</sub> fly ash from the combustion of Ekibastuz coal, high-porous (open porosity 44-52 %) composites with the homogeneous microporous structure, strength 20-36 MPa, liquid permeability up to 478 L/(m<sup>2</sup>•h•bar) and the dispersed microimpurities retention ratio of 0.98-0.99 were obtained. The acid resistance of the obtained glass-ceramic materials is 97-100 %.
Издательство:Сибирское отделение РАН, Институт химии твердого тела и механохимии СО РАН, Институт катализа им. Г.К. Борескова СО РАН, Новосибирский институт органической химии им. Н.Н. Ворожцова СО РАН, Федеральный исследовательский центр угля и углехимии СО РАН, Novosibirsk
Источник:Chemistry for Sustainable Development
Выпуск:Т. 33, № 6
Номера страниц:642-651
Держатель оригинала документа:Krasnoyarsk Science Center SB RAS, Institute of Chemistry and Chemical Technology SB RAS, Siberian Federal University
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