Particle Residence Time Distribution of Collection Zone in Packed Flotation Column

Abstract:

In order to make a further understanding of flow pattern and back mixing in the flotation process, the study about particle residence time distribution of collection zone in a packed column has been designed. The pulse tracer method was applied and the particle tracers were the mineral gangue in special size class. The residence time distribution curves of our experiment data shows that there are particle back mixings which were caused by fluid flow and geometry factors in the column. The tank-in-series model has a better fitting to the particle residence time distribution in the column according the comparison research between the tank-in-series model and axial dispersion model. The operation parameters have different effects on the particle residence time distribution according to our experimental study.

• Periodical: Advanced Materials Research (Volumes 781-784)
• Pages: 2195-2200
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.781-784.2195
• Online since: September 2013
• Authors: Li Zhang, Yi Gang Ding, Jun Ji, Chang Yan Yang, Yuan Xin Wu
• Keywords: Mixing, Packed Flotation Column, Residence Time Distribution

References

[1] Polat, J. M., Chander, S., First order flotation kinetics models and methods for estimation of the true distribution of flotation rate constants, International Journal of Mineral Processing, 58, 145-166(2000).

DOI: 10.1016/s0301-7516(99)00069-1

[2] Dobby, G. S., Finch, J, A., Mixing characteristics of industrial flotation columns, Chem. Eng. Sci., 40(7), 1061-1068(1985).

DOI: 10.1016/0009-2509(85)85063-6

[3] Rice, R. G., Tupperainen, M. I., Hedge, R. M., Dispersion and hold-up in bubble columns-comparison of rigid and flexible spargers, The Canadian Journal of Chemical Engineering, 59(6), 677-687(1981).

DOI: 10.1002/cjce.5450590605

[4] Rice, R. G., Olive, A. D., Newman, J. P., Wiles, R. J. Reduced dispersion using baffles in column flotation, Powder Technology, 10(4-5), 201-210(1974).

DOI: 10.1016/0032-5910(74)85043-6

[5] Goodall, C. M., O'Connor, C. T., Residence time distribution studied in a flotation column. Part 1: the modeling of residence time distribution in a laboratory column flotation cell, International Journal of Mineral Processing, 31, 97-113(1991).

DOI: 10.1016/0301-7516(91)90007-6

[6] Zhou, K., Zeng, A. W., Gao, C. B., Yu, G. C., Study on the two-dimension dispersion Processes of liquid in packed flotation column, Journal of Chemical Engineering of Chinese University, 17(6), 627-631(2003) (in Chinese).

[7] Yianatos, J. B., Bergh, L. G., RTD studies in an industrial flotation column: use of radioactive tracer technique, International Journal of Mineral Processing, 36, 81-91(1992).

DOI: 10.1016/0301-7516(92)90065-5

[8] Yianatos, J. B., Bergh, L. G., Diaz, F., Rodriguez, J., Mixing characteristics of industrial flotation equipment, Chemical Engineering Science, 60(8-9), 2273-2282(2005).

DOI: 10.1016/j.ces.2004.10.039

[9] Levenspeil, O., Chemical Reaction Engineering, 3rd edition, Wiley, (1998).