Abstract
A laboratory-scale test was made in which iron oxide contained in a water-cooled crucible was melted and reduced by using a 10–50% H2-Ar transferred arc plasma. The degree of reduction was found to be proportional to the amount of hydrogen fed. The efficiency of hydrogen utilization for the reduction was 50–70%, which is much higher than equilibrium values below 3000 K. This high efficiency was attributable partially to the reactivity of the hydrogen atom in a plasma and partially to the continuous contact of the hydrogen plasma with the molten iron oxide layer floating over the liquid iron formed. During the plasma reduction, evaporative loss of phosphorus was observed. The degree of phosphorus removal depended on the weight ratio, CaO/(SiO2+Al2O3). H2-Ar plasma was shown to be far superior for the phosphorus removal, compared with Ar and Ar-N2 plasma.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
M. L. Thorpe, Proceedings of the International Symposium on Advances in Extractive Metallurgy and Refining (1972), p. 275.
J. D. Holmgren, J. O. Gibson, and C. Sheer,J. Electrochem. Soc. 11, 362 (1964).
H. L. Gilles and C. W. Clump,Ind. Eng. Chem. Process Des. Dev. 9, 194 (1970).
R. G. Gold, W. R. Sandall, P. G. Cheplick, and D. R. MacRae,Ironmaking Steelmaking 4, 10 (1977).
T. Saito, Y. Morioka, K. Okabe, and K. Sanbongi,Tetsu-to-Hagane 63, S10 (1977).
M. Ozawa, N. Kitahara, I. Morinaka, and M. Tanaka,Tetsu-to-Hagane 63, S11 (1977).
K. Akashi, R. Ishizuku, and T. Mutobe, Proc. 4th ICVM, Section 3 (1974), p. 165.
K. Kassabji, B. Pateyron, J. Aubreton, P. Fauchasis, J. Amouroux, and D. Morvan, Proc. 4th Symp. on Plasma Chem. (1979), p. 236.
J. F Elliott and M. Gleiser,Thermochemistry for Steelmaking, Vol. 1 (Pergamon Press, New York, 1960).
K. Kaneko, N. Sano, and Y. Matsushita:Tetsu-to-Hagane 62, 43 (1976).
E. Kato, Y. Ouchi, T. Ishigaki, and M. Suzuki, Report of the Japanese Society for the Promotion of Science (Gakushin), 140th Committee (1979).
S. Shiomi, N. Sano, and Y. Matsushita,Tsetsu-to-Hagane 63, 1520 (1977).
S. Shiomi, N. Sano, M. Maeda, and Y. Matsushita,Tetsu-to-Hagane 64, S175 (1978).
Y. Nakamura, T. Mukai, M. Kuwabara, and K. Arihara,Tsetsu-to-Hagane 63, 2246 (1977).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Nakamura, Y., Ito, M. & Ishikawa, H. Reduction and dephosphorization of molten iron oxide with hydrogen-argon plasma. Plasma Chem Plasma Process 1, 149–160 (1981). https://doi.org/10.1007/BF00564577
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00564577