Turbulent Transport Effect on Hydrocyclone Performance
Publication: Journal of Environmental Engineering
Volume 122, Issue 4
Abstract
To date, the hydrocyclone has played an important role in producing classified or concentrated materials and in removing harmful or hazardous substances. The material behavior is dominated not only by the centrifugal force and the mean fluid velocity but also by the structure of turbulence in the hydrocyclone. In this paper the structure of turbulence has been evaluated first by analyzing observed turbulent characteristics and then, the effect of turbulence on the separation performance has been numerically evaluated taking into account the propagation of turbulent energy by diffusive mixing. The results indicate that the separation performance is deteriorated as the intensity of turbulence is increased in the hydrocyclone. In order to improve the separation performance two types of turbulence-free cyclone-like separators, called Minoclone and Staticlone, have been developed, which have been successfully applied to classifying fine particles. Finally, the Staticlone has been applied to remove metallic pollutants from fine slimes. Consequently, it has been proved that the turbulence-free separator can play an excellent role in processing of fine slimes compared with a conventional hydrocyclone.
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References
1.
Hinze, J. O. (1975). Turbulence, 2nd Ed., McGraw Hill, Inc., New York, N.Y., 790.
2.
Kawata, S., and Minami, S.(1984). “Adaptive smoothing of spectroscopic data by a linear mean-square estimation.”Appl. Spectroscopy, 38, 49–58.
3.
Koch, P. (1975). “Die einflusse der konstruktion und betriebsweise von ruhrern in mechanischen flotationsapparaten auf die hydrodynamik des dreiphasensystems und den flotationserfolg.”Freiberg. Forschungsh., A546, 5–80.
4.
Marquardt, D. W.(1963). “Algorithm for least squares estimation of nonlinear parameters.”J. Soc. Industrial & Appl. Math., 2, 431–441.
5.
Mizushina, T.(1971). “The electrochemical method in transport phenomena.”Adv. Heat Transf., 7, 87–161.
6.
Neesse, T. (1969). “Der aufbereitungstechnische Klassiervorgang im turbulenten, wassrigen Medium.”Freiberg. Forschungsh., A456, 6–50.
7.
Neesse, T.(1974). “Der hydrozyklon als turbulenzklassierer.”Chem,. Technol., 23, 146–152.
8.
Nonaka, M.(1990). “Optimum design of a solid-liquid stirred system by taking into account the propagation of turbulent energy.”Separ. Sci. Technol., 26, 753–779.
9.
Nonaka, M., Inoue, T., and Imaizumi, T. (1982). “A micro-hydrodynamic flotation model and its application to the flotation process.”Preprints of the 14th Int. Mineral Processing Congr., Paper III-9, Toronto, Canada.
10.
Nonaka, M., and Uchio, T.(1984). “A microhydrodynamic model of the sedimentation process.”Separ. Sci. Technol., 19, 337–355.
11.
Schubert, H.(1977). “Die modellierung des flotationsprozesses auf hydrodynamischer grundlage.”Neue Bergbautechn., 7, 446–456.
12.
Schubert, H.(1979). “Uber die hydrodynamik von flotationsprozessen.”Aufbereit. Techn., 20, 252–260.
13.
Schubert, H., and Neesse, T. (1973). “The role of turbulence in wet classification.”Preprints of the 10th Int. Mineral Processing Congr., Paper 29, London, U.K.
14.
Schubert, H., and Bischofberger, C.(1978). “On the hydrodynamics of flotation machines.”Int. J. Mineral Processing, 5, 131–142.
15.
Schubert, H., and Bischofberger, C. (1979). “On the optimization of hydrodynamics in flotation processes.”Preprints of the 13th Int. Mineral Processing Congr., Vol. 2, Warszawa, 353–377.
16.
Towler, B. F., and Yang, R. Y. K.(1976). “Numerical solution of non-linear parabolic PDEs by asymmetric finite difference formulae.”Chem. Engrg. J., 12, 81–87.
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Published In
Journal of Environmental Engineering
Volume 122 • Issue 4 • April 1996
Pages: 306 - 313
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Apr 1, 1996
Published in print: Apr 1996
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