Abstract
Gas injection techniques are widely used in metals refining processes. Pressure on the bath surface of reactors is sometimes highly reduced to enhance the efficiency of refining. Many fundamental and practical investigations have been made to clarify the effects of reduced surface pressure on the mixing time and reaction rates of decarburization or desulfurization in the bath. However, details of these effects are not fully understood yet. Since the mixing time and chemical reaction rates are closely associated with fluid flow phenomena in the bath, information on, for example, the total surface area of bubbles rising in the bath and liquid flow induced by the buoyancy force of the bubbles should be accumulated as much as possible. In this study, the so-called water-model experiments were carried out to reveal the effects of reduced surface pressure on the bubble and liquidflow characteristics using a two-needle electroresistivity probe and a two-dimensional laser Doppler velocimeter. At an axial position near the nozzle, each bubble expanded to a volume corresponding to the hydrostatic pressure. The bubble and liquid-flow characteristics in the axial region located farther than this axial position were found to be approximately the same as those obtained under an atmospheric surface pressure.
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T. Fujii, Y. Kato, and T. Sakuraya:Scaninject VI, 1992, vol. 1, pp. 317–40.
M. Okimori:Tetsu-to-Hagané, 1993, vol. 79 (1), pp. 1–19.
Y. Kisimoto. T. Sakuraya. T. Fujii, M. Aratani, and H. Nishikawa;Iron Steel Inst. Jpn. Int., 1992. vol. 32 (1), pp. 126–35.
S. Inoue, Y. Furuno, T. Usui, and S. Miyahara:Iron Steel Inst. Jpn. Int., 1992, vol. 32 (1), pp. 120–25.
B. Kleimt, S. Köhle, H.J. Ponten, W. Matissik, and D. Schewe:Ironmaking and Steelmaking. 1993, vol. 20 (5), pp. 390–95.
R.K. Hanna, T. Jones, R.I. Blake, and M.S. Millman:Ironmaking and Steelmaking, 1994, vol. 21 (6), pp. 37–43.
K. Harashima, A. Kiyose, M. Yano, and T. Imoto:CAMP-ISIJ, 1993, vol. 6 (1), p. 190.
M. Arai, K. Watanabe, H. Nakajima, H. Matsuno. Y. Kikuchi, and T. Ishii:CAMP-ISIJ. 1993, vol. 6 (1), p. 190.
K. Harashima, S. Mizoguchi, VI. Matsuo, and A. Kiyose:Iron Steel Inst. Jpn. Int., 1992, vol. 32 (1), pp. 111–19.
K. Harashima, T. Inomoto, and M. Yano:CAMP-ISIJ, 1993, vol. 6 (1), P. 172.
S. Kouroki:CAMP-ISIJ, 1993, vol. 6 (1): p. 175.
N. Kurokawa, K. Tanikawa, K. Nisida, Y. Sirota, and S. Kouroki.CAMP-ISIJ, 1993, vol. 6 (1), p. 134.
K. Sakaguchi and K. Ito:CAMP-ISIJ, 1993, vol. 6 (4): p. 1044.
T. Tatsuoka and K. Ito:CAMP-ISIJ, 1994, vol. 7 (4), p. 1100.
T.H. Tacke, H.G. Schubert, D.J. Weber, and K. Schwerdtfeger:Metall. Trans. B, 1985, vol. 16B, pp. 263–75.
M. Sano, H. Makino, Y. Ozawa, and K. Mori:Metall. Trans. ISIJ, 1986, vol. 26, pp. 298–04.
A.H. Castillejos and J.K. Brimacombe:Metall. Trans. B, 1987, vol. 18B, pp. 659–71.
S. Taniguchi, A. Kikuchi, H. Matsuzaki, and N. Bessho:Trans. Iron Steel Inst. Jpn., 1988, vol. 28, pp. 262–70.
S.C. Koria and S. Singh:Steel Res., 1989, vol. 60 (7), pp. 301–07.
M. Kawakami, S. Hosono, S. Douwaki, and K. Ito:Proc. 5th China-Japan Symp. on Science and Technology of Iron and Steel, 1989, pp. 162–68.
Y. Xie, S. Orsten, and F. Oeters:Iron Steel Inst. Jpn. Int., 1992, vol. 32 (1), pp. 66–75.
M. Iguchi, J. Tani, T. Uemura, H. Kawabata, and H. Takeuchi:Iron Steel Inst. Jpn. Int., 1989, vol. 29 (4), pp. 309–17.
M. Iguchi, H. Takeuchi, and Z. Morita:Iron Steel Inst. Jpn. Int., 1991, vol. 31 (3), pp. 246–53.
M. Iguchi, T. Kondoh, Z. Morita, K. Nakajima, K. Hanazaki, T. Uemura, and F. Yamamoto:Scaninject VI, 1992, vol. 1, pp. 145–65.
M. Iguchi, T. Kondoh, and T. Uemura:Int. J. Multiphase Flow, 1994, vol. 20 (4), pp. 753–62.
M. Iguchi, T. Chihara, T. Kuranaga, H. Ueda, S. Kodani, and Z. Morita:Tetsu-to-Hagané, 1994, vol. 80 (10), pp. 742–47.
M. Iguchi, K. Nozawa, and Z. Morita:Iron Steel Inst. Jpn. Int., 1991, vol. 31 (9), pp. 952–59.
M. Iguchi, K. Nozawa, H. Tomida, and Z. Morita:Iron Steel Inst. Jpn. Int., 1992, vol. 32 (6), pp. 747–54.
I. Wygnanski and H. Fiedler:J. Fluid Mech., 1969, vol. 38 (3), pp. 577–12.
N.R. Panchapakesan and J.L. Lumley:J. Fluid Mech., 1993, vol. 246, pp. 197–23.
M. Iguchi, H. Ueda, and T. Uemura:Int. J. Multiphase Flow, 1995, vol. 21 (5), pp. 861–73.
Y.Y. Sheng and G.A. Irons:Metall. Trans. B, 1992, vol. 23B, pp. 779–88.
M. Iguchi, Y. Demoto, N. Sugawara, and Z. Morita:Iron Steel Inst. Jpn. Int., 1992, vol. 32, pp. 998–1005.
M. Iguchi, H. Kawabata, K. Nakajima, and Z. Morita:Metall. Mater. Trans. B, 1995, vol. 26B, pp. 67–74.
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HIROSHI UEDA, formerly Graduate Student, Department of Materials Science and Processing, Osaka University.
ZEN-ICHIRO MORITA, Professor Emeritus, Department of Materials Science and Processing, Osaka University.
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Iguchi, M., Ueda, H., Chihara, T. et al. Model study of bubble and liquid-flow characteristics in a bottom blown bath under reduced pressure. Metall Mater Trans B 27, 765–772 (1996). https://doi.org/10.1007/BF02915605
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DOI: https://doi.org/10.1007/BF02915605