TY - JOUR
T1 - Phase Equilibria and Thermodynamics of FeO · Cr2O3−MgO · Cr2O3−MgO · Al2O3 Spinel Structure Solid Solution Saturated with (Cr, Al)2O3
AU - Hino, Mitsutaka
AU - Higuchi, Ken Ichi
AU - Nagasaka, Tetsuya
AU - Ban-Ya, Shiro
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1995
Y1 - 1995
N2 - Thermodynamic properties of chromium ore are important to control the new process for crude stainless steel production in a converter, in particular, pre-reduction of the ore in the process. In the present work, phase equilibria and the activities of iron chromite in FeO · Cr2O3−MgO · Cr2O3−MgO · Al2O3 spinel structure solid solution saturated with (Cr, Al)2O3 have been determined at 1 573 K, by the equilibrium of iron dissolved in liquid silver held in the spinel structure solid solution crucible with CO-CO2 gas mixture. No measurable solubility of FeO · Cr2O3−MgO · Cr2O3−MgO · Al2O3 solid solution in (Cr, Al)2O3 phase was detected, while small solubility of (Cr, Al)2O3 in the spinel structure solid solution phase was found. Tie-lines between (Cr, Al)2O3 and the spinel structure phases were determined. The activity of FeO · Cr2O3 in FeO · Cr2O3−MgO · Cr2O3−MgO · Al2O3 spinel structure solid solution saturated with (Cr, Al)2O3 showed negative deviation from ideality. It was observed that the spinel structure solid solution showed regular solution behavior, and α-functions between each constituent in the FeO · Cr2O3−MgO · Cr2O3−MgO · Al2O3 system were determined as follows; [formula omitted].
AB - Thermodynamic properties of chromium ore are important to control the new process for crude stainless steel production in a converter, in particular, pre-reduction of the ore in the process. In the present work, phase equilibria and the activities of iron chromite in FeO · Cr2O3−MgO · Cr2O3−MgO · Al2O3 spinel structure solid solution saturated with (Cr, Al)2O3 have been determined at 1 573 K, by the equilibrium of iron dissolved in liquid silver held in the spinel structure solid solution crucible with CO-CO2 gas mixture. No measurable solubility of FeO · Cr2O3−MgO · Cr2O3−MgO · Al2O3 solid solution in (Cr, Al)2O3 phase was detected, while small solubility of (Cr, Al)2O3 in the spinel structure solid solution phase was found. Tie-lines between (Cr, Al)2O3 and the spinel structure phases were determined. The activity of FeO · Cr2O3 in FeO · Cr2O3−MgO · Cr2O3−MgO · Al2O3 spinel structure solid solution saturated with (Cr, Al)2O3 showed negative deviation from ideality. It was observed that the spinel structure solid solution showed regular solution behavior, and α-functions between each constituent in the FeO · Cr2O3−MgO · Cr2O3−MgO · Al2O3 system were determined as follows; [formula omitted].
KW - FeO · CrO−MgO · CrO−MgO · AlO
KW - activity
KW - aluminum chromite
KW - iron chromite
KW - picro-chromite
KW - spinel structure solid solution
KW - thermodynamics
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U2 - 10.2355/isijinternational.35.851
DO - 10.2355/isijinternational.35.851
M3 - Article
AN - SCOPUS:0029230346
VL - 35
SP - 851
EP - 858
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
SN - 0915-1559
IS - 7
ER -