Abstract
The removal of nonmetallic inclusions from steel melts prior to casting has significant merit. Laboratory prepared steel melts containing carefully prepared alumina inclusions have been successfully filtered at 1600 °C. Two distinct types of filters were used: (i) tabular alumina packed bed (0.2 to 0.5 cm nominal diameter) and (ii) extruded monolithic alumina (400 cells per square inch). The kinetics of the filtration process have been modeled, and inclusion removal efficiency of up to 96 pct has been achieved in laboratory melts. The results show that inclusion removal efficiency is a strong function of melt velocity in the range of 0.08 to 0.68 cm per second and is weakly dependent on filter length. The type of filter utilized affects inclusion removal efficiency significantly. The inclusion capture kinetics and the filtration characteristics of the filter media tested are discussed.
Similar content being viewed by others
References
S.N. Singh:Metall. Trans., 1974, vol. 5, pp. 2165–78.
R.B. Snow and J. A. Shea:J. Amer. Cer. Soc, 1949, vol. 32, pp. 187–94.
T.B. Braun,J.F. Elliott, and M.C. Flemings:Metall. Trans. B, 1979, vol. 10B, pp. 171–84.
H. A. Sloman and E. L. Evans:J. Iron and Steel Inst., 1950, vol. 165, pp. 81–90.
U. Lindborg and K. Torssell:Trans. AIME, 1968, vol. 242, pp. 94–102.
S.K. Saxena, H. Sandberg, T. Waldenstron, A. Persson, and S. Steenson:Scand. J. Metallurgy, 1977, vol. 7, pp. 126–33.
S. K. Paul, A. K. Chakrabarty. and S. Basu:Metall. Trans. B, 1982, vol. 13B, pp. 185–92.
S.K. Saxena:Ironmaking and Steelmaking, 1980, no. 6, pp. 281-87.
M. Ishiguro: Japanese Patent No. 77-70918, 1977.
J. Happ and M. G. Frohberg:Giessereiforschung, 1971, vol. 23, pp. 1–9.
M. Ishiguro: Japanese Patent No. 80-24915, 1980.
K. Narita, A. Tomita, Y. Hirooka, and H. Matsumoto: Japanese Patent No. 76-94411, 1976.
R.B. Miclot: Technical Report No. 67-1507, Rock Island Arsenal, Illinois, June 1967.
F. R. Mollard and N. Davidson:Trans. AFS, 1978, vol. 86, pp. 479–86.
K.J. Brondyke and P.D. Hess:Trans. TMS-AIME, 1964, vol. 230, pp. 1552–56.
M. V. Brant, D. C. Bone, and E. F. Emley:J. Metals, 1971, vol. 23, pp. 48–53.
D. Apelian: Sc.D. Thesis, Massachusetts Institute of Technology, Cambridge, MA, 1972.
D. Apelian and R. Mutharasan:J. Metals, 1980, vol. 32, pp. 14–19.
P.D. Geleta: M.S. Thesis, Drexel University, Philadelphia, PA, 1981.
M. A. Gencer and R. Mutharasan:Advances in Biotechnology, Pergamon Press, New York, NY, 1981, pp. 627–34.
R. Mutharasan: “Mathematical Modeling of Cell Immobilization”, paper #84e, AIChE Annual Meeting, Los Angeles, CA, Nov. 1982.
D. Apelian, R. Mutharasan, C. Romanowski,E. Eckert, and R. Miller: “Commercial Available Filters for Molten Metal Treatment—A Property Evaluation”,Light Metals, J.E. Andersen, ed.,TMS-AIME, Warrendale,PA, 1982, pp. 935–68.
G. Yao, M. Habibian, and C. R. O'Melia:Environmental Science and Technology, 1971, pp. 1105–12.
Author information
Authors and Affiliations
Additional information
Formerly with Drexel University, Philadelphia, PA.
Rights and permissions
About this article
Cite this article
Ali, S., Mutharasan, R. & Apelian, D. Physical refining of steel melts by filtration. Metall Trans B 16, 725–742 (1985). https://doi.org/10.1007/BF02667509
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02667509