Thermodynamics of O, N, and S in liquid Fe equilibrated with CaO-AI2O3-MgO slags

Ryo Inoue; Hideaki Suito

doi:10.1007/BF02665206

Thermodynamics of O, N, and S in liquid Fe equilibrated with CaO-AI₂O₃-MgO slags

Ryo Inoue, Hideaki Suito

Institute of Multidisciplinary Research for Advanced Materials (IMRAM)

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

42 Citations (Scopus)

Abstract

Nitrogen and S distribution ratios between CaO-Al₂O₃-MgO slags and liquid Fe were measured at 1873 K as a function of Al (or Mg, Ca) content in metal, using CaO, MgO, and A1₂O₃ crucibles. Based on the results for the solubility product of MgO, the equilibrium constant, K_Mg, for the reaction MgO =Mg +O and the first-order interaction parameter, e_O^Mg (e_Mg^O ), were estimated to be log K_Mg = -7.8 ± 0.2 and e_O^Mg = -190 ± 60 (e_Mg^O = -290 ± 90), respectively. The activities of A1₂O₃ at the slag compositions double-saturated with CaO/MgO, MgO/ MgO A1₂O₃, and MgO Al₂O₃/CaO 2A1₂O₃ components were obtained from the S distribution ratios between slag and metal, coupled with the reported values of sulfide capacities. Nitride capacities were also estimated from the N distribution ratios and the activities of A1₂O₃.

Original language	English
Pages (from-to)	235-244
Number of pages	10
Journal	Metallurgical and Materials Transactions B
Volume	25
Issue number	2
DOIs	https://doi.org/10.1007/BF02665206
Publication status	Published - 1994 Apr

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Engineering(all)

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@article{fd7c114e31044ed290ab9174245bd040,

title = "Thermodynamics of O, N, and S in liquid Fe equilibrated with CaO-AI2O3-MgO slags",

abstract = "Nitrogen and S distribution ratios between CaO-Al2O3-MgO slags and liquid Fe were measured at 1873 K as a function of Al (or Mg, Ca) content in metal, using CaO, MgO, and A12O3 crucibles. Based on the results for the solubility product of MgO, the equilibrium constant, K Mg, for the reaction MgO =Mg +O and the first-order interaction parameter, e O Mg (e Mg O ), were estimated to be log K Mg = -7.8 ± 0.2 and e O Mg = -190 ± 60 (e Mg O = -290 ± 90), respectively. The activities of A12O3 at the slag compositions double-saturated with CaO/MgO, MgO/ MgO A12O3, and MgO Al2O3/CaO 2A12O3 components were obtained from the S distribution ratios between slag and metal, coupled with the reported values of sulfide capacities. Nitride capacities were also estimated from the N distribution ratios and the activities of A12O3.",

author = "Ryo Inoue and Hideaki Suito",

year = "1994",

month = apr,

doi = "10.1007/BF02665206",

language = "English",

volume = "25",

pages = "235--244",

journal = "Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science",

issn = "1073-5615",

publisher = "Springer International Publishing AG",

number = "2",

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TY - JOUR

T1 - Thermodynamics of O, N, and S in liquid Fe equilibrated with CaO-AI2O3-MgO slags

AU - Inoue, Ryo

AU - Suito, Hideaki

PY - 1994/4

Y1 - 1994/4

N2 - Nitrogen and S distribution ratios between CaO-Al2O3-MgO slags and liquid Fe were measured at 1873 K as a function of Al (or Mg, Ca) content in metal, using CaO, MgO, and A12O3 crucibles. Based on the results for the solubility product of MgO, the equilibrium constant, K Mg, for the reaction MgO =Mg +O and the first-order interaction parameter, e O Mg (e Mg O ), were estimated to be log K Mg = -7.8 ± 0.2 and e O Mg = -190 ± 60 (e Mg O = -290 ± 90), respectively. The activities of A12O3 at the slag compositions double-saturated with CaO/MgO, MgO/ MgO A12O3, and MgO Al2O3/CaO 2A12O3 components were obtained from the S distribution ratios between slag and metal, coupled with the reported values of sulfide capacities. Nitride capacities were also estimated from the N distribution ratios and the activities of A12O3.

AB - Nitrogen and S distribution ratios between CaO-Al2O3-MgO slags and liquid Fe were measured at 1873 K as a function of Al (or Mg, Ca) content in metal, using CaO, MgO, and A12O3 crucibles. Based on the results for the solubility product of MgO, the equilibrium constant, K Mg, for the reaction MgO =Mg +O and the first-order interaction parameter, e O Mg (e Mg O ), were estimated to be log K Mg = -7.8 ± 0.2 and e O Mg = -190 ± 60 (e Mg O = -290 ± 90), respectively. The activities of A12O3 at the slag compositions double-saturated with CaO/MgO, MgO/ MgO A12O3, and MgO Al2O3/CaO 2A12O3 components were obtained from the S distribution ratios between slag and metal, coupled with the reported values of sulfide capacities. Nitride capacities were also estimated from the N distribution ratios and the activities of A12O3.

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Thermodynamics of O, N, and S in liquid Fe equilibrated with CaO-AI₂O₃-MgO slags

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