Journal of Siberian Federal University. Chemistry / The Peculiarities of the Composition for Individual Ferrospheres of Three Morphological Types

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2013 6 (4)
Authors
Fedorchak, Marina A.; Sharonova, Olga M.; Mazurova, Elena V.; Zhizhaev, Anatoliy M.
Contact information
Fedorchak, Marina A.:Institute of Chemistry and Chemical Technology, Siberian Branch of Russian Academy of Sciences, 50/24 Akademgorodok, Krasnoyarsk, 660036 Russia; Sharonova, Olga M.:Institute of Chemistry and Chemical Technology, Siberian Branch of Russian Academy of Sciences, 50/24 Akademgorodok, Krasnoyarsk, 660036 Russia; Mazurova, Elena V.:Institute of Chemistry and Chemical Technology, Siberian Branch of Russian Academy of Sciences, 50/24 Akademgorodok, Krasnoyarsk, 660036 Russia; Zhizhaev, Anatoliy M.:Institute of Chemistry and Chemical Technology, Siberian Branch of Russian Academy of Sciences, 50/24 Akademgorodok, Krasnoyarsk, 660036 Russia
Keywords
ferrospheres; microprobe analysis; composition; morphology
Abstract

The major component and phase compositions of the -32+20 μm ferrosphere fraction, extracted from high-calcium fly ashes, and the compositions of individual globules of different morphological type were studied. It was found that the main phases of the fraction are (1) ferrospinel (31 wt.%) with the lattice parameter close to stoichiometric magnetite parameters, (2) hematite (31 wt.%) with lattice parameters smaller than the stoichiometric hematite parameters and (3) X-ray amorphous phase with unidentified crystalline phases (37 wt.%). According to the SEM-EDS data on powders and polished sections, it was shown that the base types of individual globules are block, skeletal-dendritic and plate types. They show the same surface and bulk crystallization for iron oxide phases and the CaO = f (Fe2O3) dependence is described by linear regression equations with high correlation coefficients. The differences of composition for the three main types of globules, were identified

Pages
419-430
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/10156