Thermodynamic estimation on the reduction behavior of iron-chromium ore with carbon

Mitsutaka Hino; Ken ichi Higuchi; Tetsuya Nagasaka; Shiro Ban-ya

doi:10.1007/s11663-998-0112-0

Thermodynamic estimation on the reduction behavior of iron-chromium ore with carbon

Mitsutaka Hino, Ken ichi Higuchi, Tetsuya Nagasaka, Shiro Ban-ya

ENG - Metallurgy

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

The thermodynamics for reduction of iron-chromium ore by carbon is discussed. The thermodynamic properties of iron-chromium ore were evaluated from our previous work on the activities of constituents in the FeO · Cr₂O₃-MgO · Cr₂O₃-MgO · Al₂O₃ iron-chromite spinel-structure solid solution saturated with (Cr, Al)₂O₃, and those of the Fe-Cr-C alloy were estimated by a sublattice model. The stability diagrams were drawn for carbon reduction of pure FeO · Cr₂O₃, (Fe_0.5Mg_0.5)O · (Cr_0.8Al_0.2)₂O₃ iron-chromite solid solution, and South African iron-chromium ore. The evaluated stability diagrams agreed well with the literature data. It was concluded that the lowest temperature for reduction of FeO · Cr₂O₃ in the iron-chromium ore was 1390 K and a temperature higher than 1470 K would be necessary to reduce Cr₂O₃ in MgO · (Cr,Al)₂O₃ in the prereduction process of iron-chromium ore. The composition of liquid Fe-Cr-C alloy in equilibrium with iron-chromium ore was also estimated under 1 atm of CO at steelmaking temperature. The predicted metal composition showed reasonable agreement with the literature values.

Original language	English
Pages (from-to)	351-360
Number of pages	10
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	29
Issue number	2
DOIs	https://doi.org/10.1007/s11663-998-0112-0
Publication status	Published - 1998 Jan 1

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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title = "Thermodynamic estimation on the reduction behavior of iron-chromium ore with carbon",

abstract = "The thermodynamics for reduction of iron-chromium ore by carbon is discussed. The thermodynamic properties of iron-chromium ore were evaluated from our previous work on the activities of constituents in the FeO · Cr2O3-MgO · Cr2O3-MgO · Al2O3 iron-chromite spinel-structure solid solution saturated with (Cr, Al)2O3, and those of the Fe-Cr-C alloy were estimated by a sublattice model. The stability diagrams were drawn for carbon reduction of pure FeO · Cr2O3, (Fe0.5Mg0.5)O · (Cr0.8Al0.2)2O3 iron-chromite solid solution, and South African iron-chromium ore. The evaluated stability diagrams agreed well with the literature data. It was concluded that the lowest temperature for reduction of FeO · Cr2O3 in the iron-chromium ore was 1390 K and a temperature higher than 1470 K would be necessary to reduce Cr2O3 in MgO · (Cr,Al)2O3 in the prereduction process of iron-chromium ore. The composition of liquid Fe-Cr-C alloy in equilibrium with iron-chromium ore was also estimated under 1 atm of CO at steelmaking temperature. The predicted metal composition showed reasonable agreement with the literature values.",

author = "Mitsutaka Hino and Higuchi, {Ken ichi} and Tetsuya Nagasaka and Shiro Ban-ya",

year = "1998",

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doi = "10.1007/s11663-998-0112-0",

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T1 - Thermodynamic estimation on the reduction behavior of iron-chromium ore with carbon

AU - Hino, Mitsutaka

AU - Higuchi, Ken ichi

AU - Nagasaka, Tetsuya

AU - Ban-ya, Shiro

PY - 1998/1/1

Y1 - 1998/1/1

N2 - The thermodynamics for reduction of iron-chromium ore by carbon is discussed. The thermodynamic properties of iron-chromium ore were evaluated from our previous work on the activities of constituents in the FeO · Cr2O3-MgO · Cr2O3-MgO · Al2O3 iron-chromite spinel-structure solid solution saturated with (Cr, Al)2O3, and those of the Fe-Cr-C alloy were estimated by a sublattice model. The stability diagrams were drawn for carbon reduction of pure FeO · Cr2O3, (Fe0.5Mg0.5)O · (Cr0.8Al0.2)2O3 iron-chromite solid solution, and South African iron-chromium ore. The evaluated stability diagrams agreed well with the literature data. It was concluded that the lowest temperature for reduction of FeO · Cr2O3 in the iron-chromium ore was 1390 K and a temperature higher than 1470 K would be necessary to reduce Cr2O3 in MgO · (Cr,Al)2O3 in the prereduction process of iron-chromium ore. The composition of liquid Fe-Cr-C alloy in equilibrium with iron-chromium ore was also estimated under 1 atm of CO at steelmaking temperature. The predicted metal composition showed reasonable agreement with the literature values.

AB - The thermodynamics for reduction of iron-chromium ore by carbon is discussed. The thermodynamic properties of iron-chromium ore were evaluated from our previous work on the activities of constituents in the FeO · Cr2O3-MgO · Cr2O3-MgO · Al2O3 iron-chromite spinel-structure solid solution saturated with (Cr, Al)2O3, and those of the Fe-Cr-C alloy were estimated by a sublattice model. The stability diagrams were drawn for carbon reduction of pure FeO · Cr2O3, (Fe0.5Mg0.5)O · (Cr0.8Al0.2)2O3 iron-chromite solid solution, and South African iron-chromium ore. The evaluated stability diagrams agreed well with the literature data. It was concluded that the lowest temperature for reduction of FeO · Cr2O3 in the iron-chromium ore was 1390 K and a temperature higher than 1470 K would be necessary to reduce Cr2O3 in MgO · (Cr,Al)2O3 in the prereduction process of iron-chromium ore. The composition of liquid Fe-Cr-C alloy in equilibrium with iron-chromium ore was also estimated under 1 atm of CO at steelmaking temperature. The predicted metal composition showed reasonable agreement with the literature values.

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