Evolution of mineral composition of fluxed sinter from iron ore concentrate of the Kovdor deposit
https://doi.org/10.17073/0368-0797-2019-7-578-580
Abstract
Metallurgical conversion methods are still missing iron ore with heterogeneous structure magnetite of the Kovdor deposit. Sintering mechanism of Kovdor concentrate was investigated in the wide CaO/SiO2 basicity range of 1.2 – 3.0 for sintering process conditions. Main influence of magnetite crystal structure on the way of charge phase changing in sintering process is shown for the first time. As a result of sintering with the low basicity of 1.2 – 2.0 two phases sinter system was formed, containing magnetite and silicate bond of melilitic composition. The analysis has shown that melilitic bond is the straight analog of the basic and acid blast furnace slag. The difficult mineral composition, containing four phases, is formed with the high basicity of 2.0 – 3.0. Magnetite and bond of crystals of calciumalumosilicoferrite are the main minerals, which occupy almost the whole volume of the sinter. By composition and number of phases, magnetite-ferritic composition is two-phase sinter system. Development of appropriate sintering process regimes is required for each of the determined sinter systems.
About the Authors
T. Ya. Malysheva
National University of Science and Technology “MISIS” (MISIS)
Russian Federation
Cand. Sci. (Geol.-Mineralogical), Professor of the Chair “Energy-Efficient and Resource-Saving Industrial Technologies”
Russian Federation
Cand. Sci. (Geol.-Mineralogical), Professor of the Chair “Energy-Efficient and Resource-Saving Industrial Technologies”
S. A. Pisarev
National University of Science and Technology “MISIS” (MISIS)
Russian Federation
Postgraduate of the Chair “Energy-Efficient and Resource-Saving Industrial Technologies”
Russian Federation
Postgraduate of the Chair “Energy-Efficient and Resource-Saving Industrial Technologies”
A. S. Kalinin
National University of Science and Technology “MISIS” (MISIS)
Russian Federation
MA Student of the Chair “Energy-Efficient and ResourceSaving Industrial Technologies”
Russian Federation
MA Student of the Chair “Energy-Efficient and ResourceSaving Industrial Technologies”
A. R. Makavetskas
National University of Science and Technology “MISIS” (MISIS)
Russian Federation
Senior Engineer
Russian Federation
Senior Engineer
Yu. Yu. Fishchenko
National University of Science and Technology “MISIS” (MISIS)
Russian Federation
Engineer
Russian Federation
Engineer
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Review
For citations:
Malysheva T.Ya., Pisarev S.A., Kalinin A.S., Makavetskas A.R., Fishchenko Yu.Yu. Evolution of mineral composition of fluxed sinter from iron ore concentrate of the Kovdor deposit. Izvestiya. Ferrous Metallurgy. 2019;62(7):578-580. (In Russ.) https://doi.org/10.17073/0368-0797-2019-7-578-580
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