ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Equilibrium Relationships between Oxide Compounds in MgO–Ti2O3–Al2O3 with Iron at 1873 K and Variations in Stable Oxides with Temperature
Hideki OnoToshio Ibuta
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2011 Volume 51 Issue 12 Pages 2012-2018

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Abstract

It is important to determine the equilibrium relationships between the oxide compounds in MgO–Ti2O3–Al2O3 and iron to avoid Al2O3 or MgO·Al2O3 formation and for inclusion control. In this study, the equilibrium relationships between the oxide compounds in MgO–Ti2O3–Al2O3 and molten iron are investigated at 1873 K. The phase-stability diagrams, which show the equilibrium relationships between the oxide compounds in MgO–Ti2O3–Al2O3 and molten iron, are described. It is also important to know the oxides that newly form after solidification. Accordingly, the temperature-dependences of the stable compounds that newly form after solidification were investigated using the thermodynamic calculation software FactSage 6.1. Although the compounds formed after solidification are not necessarily the same as the equilibrium oxide compounds at 1873 K, the correlation between them can be confirmed. In particular, under the unstable condition of MgAl2O4 at 1873 K, it is found that the formation of MgAl2O4 could also be suppressed after solidification.

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© 2011 by The Iron and Steel Institute of Japan
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