Abstract
The bubble properties in the column flotation system are deeply affected by the bubble-generator type, frother dosage, and superficial gas velocity. This study is to determine the bubble-generator type, which effectively produces micro-bubbles to affect the flotation efficiency. Characteristics for two types of bubble generators like the in-line mixer and sparger are examined by bubble properties such as bubble diameter, holdup and bubble velocity. Micro bubbles generated from an in-line mixer result in the increase of the bubble rising velocity and gas holdup. Bubbles produced at the in-line mixer were more effective for operating the flotation system than that of the sparger. It means that the in-line mixer bubble generator is more effective than a sparger in designing or operating the column flotation system.
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References
Amhed, N. and Jameson, G. J., “The Effect of Bubble Size on the Rate of Flotation of Fine Particles”,Int. J. Mineral Process,14, 195 (1985).
Cassel, E. A., Kfuman, K. M. and Matijevic, E., “The Effects of Bubble Size on Microflotation”,Water Res.,9, 1017 (1975).
Clift, R., Grace, J. R. and Weber, M. E., “Bubble, Drops, and Particles. Academic Press”, New York (1978).
Crawford, R. and Ralston, J., “The Influence of Particle Size and Con-tact Angle in Mineral Flotation”,Int. J. Mineral Process,23, 1 (1988).
Dave, N. and Gray, N. B., “Modeling of Annular Swirled Flow Lances with Helical Inserts”,Trans. Instn. Min. Metal.,98, C178-C184 (1989).
Dobby, G. S. and Finch, J. A., “Particle Collection in Columns-gas Rate and Bubble Size Effects”,Canadian Metallurgical Quarterly,25, 9 (1986).
Dobby, G. S., Yianatos, J. B. and Finch, J. A., “Estimation of Bubble Diameter in Flotation Column from Drift Flux Analysis”,Canadian Metallurgical Quarterly,27, 85 (1988).
Finch, J. A. and Dobby, G. S., “Column Flotation”, Pergamon Press, 9 (1990).
Hur, J. M., Chang, D. and Chung, T. H., “Characteristics of Critical Solid-Liquid Separation and Its Effect on the Performance of an Anaero-bic Sequencing Batch Reactor Treating Municipal Sludge”,Korean J. Chem. Eng.,15, 596 (1998).
Jiang, Z. W. and Holtham, P. N., “Theoretical Model of Collision Be-tween Particles and Bubbles in Flotation”,Trans. Instn. Min. Metall,95, C187-C194 (1986).
Kim, S. D., Baker, C. G. J. and Bergougnou, M. A., “Bubble Charac-teristics in Three Phase Fluidized Beds”,Chemical Engineering Sci-ence,32, 1299 (1977).
Lee, D. H., Epstein, N. and Grace, J. R., “Hydrodynamic Transition from Fixed to Fully Fluidized Beds for Three-Phase Inverse Fluidization”,Korean J. Chem. Eng.,17, 684 (2000).
Lee, J. E., “Separation Characteristics of Fly Ash through the Analysis of Bubble Behavior in Counter Current Column Flotation”, Ph.D, Dissertation, Power Technology, Pusan National University, Pusan, Korea (1999).
Lee, J. E. and Lee, J. K., “Effect of Microbubbles and Particles Size on the Particle Collection in the Column Flotation”,Korean J. Chem. Eng.,19, 703 (2002).
Masliyah, J. H., “Hindered Settling in a Multi-species Particle System”,Chemical Engineering Science,34, 1166 (1979).
Nicklin, D. J., “Two-phase Bubble Flow”,Chemical Engineering Sci-ence,17, 693 (1962).
Pal, R. and Masliyah, J., “Row Characterization of a Flotation Column^'The Canadian Journal of Chemical Engineering,67, 916 (1989).
Patel, S. A., Daly, J. G. and Bukur, D. B., “Bubble-size Distribution in Fischer-Tropsch Derived Waxes in a Bubble Column”,AIChE J.,36, 93 (1990).
Richardson, J. F. and Zaki, W. N., “Sedimentation and Fluidization: Part I”,Trans. Instn. Chem. Engrs.,32, 35 (1954).
Sasaki, H., Matsukawa, H., Usui, S. and Matijevic, E., “A New Method for Measuring the Size Distribution of Gas Bubble in Aqueous Me-dia”,Journal of Colloid and Interface Science,113, 500 (1986).
Shah, Y. T., Kelkar, S. P. and Godbole, S. P., “Design Parameters Esti-mations for Bubble Column Reactors”,AIChE J.,28, 353 (1982).
Shen, G. and Finch, J. A., “Bubble Swarm Velocity in a Column”,Chem-ical Engineering Science,51, 3665 (1996).
Summers, A. J., Xu, M. and Finch, J. A., “Ring Electrodes for Estima-tion of Gas Hold-up and Identification of Process Disturbances in Jameson Cell Downcomer”,Trans. Instn. Min. Metall.,102, C135-C137 (1992).
Yamashita, F., “Effect of Geometrical Parameters of Draft Tubes and Clear Liquid Height on Gas Holdup in a Bubble Column for Gas Dispersion into Tubes”,Korean J. Chem. Eng.,16, 6 (1999).
Yianatos, J. B., Finch, J. A., Dobby, G S. and Xu, M., “Bubble Size Es-timation in a Bubble Swarm”,Journal of Colloid Interface Science,126, 37 (1987).
Yoon, R. H., “Microbubble Flotation”,Minerals Engineering,6, 619 (1993).
Zhou, Z. A., Egiebor, N. O. and Plitt, L. R., “Frother Effects on Bubble Motion in a Swarm”,Canadian Metallurgical Quarterly,32, 89 (1993).
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Lee, JE., Choi, WS. & Lee, JK. A study of the bubble properties in the column flotation system. Korean J. Chem. Eng. 20, 942–949 (2003). https://doi.org/10.1007/BF02697303
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DOI: https://doi.org/10.1007/BF02697303