TY - JOUR
T1 - Thermodynamics of chromium oxides in CaO-SiO2-CaF2 slag
AU - Okabe, Yasushi
AU - Tajima, Isao
AU - Ito, Kimihisa
N1 - Funding Information:
The authors gratefully acknowledge Professors K. Morita and N. Sano, the University of Tokyo, for their helpful discussions, and thank Mr. Yohei Ito for his technical assistance. A part of this research was financially supported by the Kawakami Research Foundation and the Research Promotion Fund of Waseda University.
PY - 1998
Y1 - 1998
N2 - The distribution ratio of chromium between a CaO-SiO2-CaF2 slag and liquid silver under the oxygen partial pressure used in practical hot-metal dephosphorization treatment was measured at 1623 K. The distribution ratio was minimal when the basicity index of a slag, wt pct CaO/wt pct SiO2, was about 2. The redox equilibrium between CrO (Cr2+) and CrO1.5 (Cr3+) in the slag was also measured as a function of slag composition. The calculated activity coefficient of CrO had a maximum value at wt pct CaO/wt pct SiO2 = 2, whereas that of CrO1.5 decreased monotonously with the increase in slag basicity.
AB - The distribution ratio of chromium between a CaO-SiO2-CaF2 slag and liquid silver under the oxygen partial pressure used in practical hot-metal dephosphorization treatment was measured at 1623 K. The distribution ratio was minimal when the basicity index of a slag, wt pct CaO/wt pct SiO2, was about 2. The redox equilibrium between CrO (Cr2+) and CrO1.5 (Cr3+) in the slag was also measured as a function of slag composition. The calculated activity coefficient of CrO had a maximum value at wt pct CaO/wt pct SiO2 = 2, whereas that of CrO1.5 decreased monotonously with the increase in slag basicity.
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U2 - 10.1007/s11663-998-0015-0
DO - 10.1007/s11663-998-0015-0
M3 - Article
AN - SCOPUS:0031988399
SN - 1073-5615
VL - 29
SP - 131
EP - 136
JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
IS - 1
ER -