DBPapers
DOI: 10.5593/SGEM2014/B42/S18.028

SMELTING REDUCTION OF IRON OXIDES AS APPLIED TO RED MUD PROCESSING

S. Makeev, A. Zaytsev, Y. Pokhvisnev, V. Valavin, A. Fedorova
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-16-2 / ISSN 1314-2704, June 19-25, 2014, Book 4, Vol. 2, 211-218 pp

ABSTRACT
Thermodynamic modeling of iron reduction process from liquid slag by carbon was
performed in the context of smelting reduction process application for iron (hot metal)
production. It has been shown that iron reduction from liquid slag is thermodynamically
possible only in case of the absolute bivalent iron (FeO) domination. This stage is
always preceded by dissolved trivalent iron (Fe2O3) reduction up to bivalent iron form.
Experiments pertaining to bivalent and trivalent iron reduction from slag by activated
carbon were carried out. It has been shown that the rate of iron oxides reduction from
slag with dominant trivalent iron is less compared to that of bivalent iron. This effect
was noted for any types of carbon reductant. Because trivalent iron (Fe2O3) is the main
red mud component, this effect is to be considered in the process of development of
smelting reduction units intended for red mud processing.

Keywords: smelting reduction, bi- and trivalent iron, thermodynamic modeling, red
mud, Romelt technology

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