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A оne-stage aerodynamic separation of fly ash produced via the pulverized combustion of coal from Kuznetsk basin was carried out. Morphologically homogeneous fractions of microspherical particles, with size parameters – dmax= 4, 16 и 60 μm and d90= 10, 40 и 115 μm, were recovered. It was found that all obtained fractions have two major chemical components, namely SiO2 (54-63 wt %) and Al2O3 (21-29 wt %). The phase composition includes amorphous component – aluminosilicate glass (8184 wt %) and crystalline phases – mullite (7-9 wt %), quartz (4-9 wt %), hematite (about 2 wt %) and ferrospinel (about 1 wt %). An increase in the SiO2 content and quantity of quartz, as well as a decrease in the Al2O3 content and quantity of mullite were observed with increasing fraction size.

Characterization of Aerodynamically Separated Products of Fly Ash Produced via the Pulverized Combustion of Coal from Kuznetsk Basin