Dispersion characteristics in column flotation of fine coal
- West Virginia Univ., Morgantown, WV (United States). Dept. of Mineral Processing Engineering
The dispersion model of nonideal flow was applied to describe the hydrodynamic state within the flotation column. Residence time distribution (RTD) data of a laboratory flotation column were measured to determine the parameters of the model. The effects of operating variables and column geometry on the Peclet number which reflects the extent of axial dispersion were investigated and a semi-empirical expression of Pe was formulated. The dispersion model was validated for the column flotation of ultrafines coal. Under the conditions of sufficient aeration rate and frother addition, a good agreement between the measured recoveries and predicted data was obtained. The dispersion model with first-order flotation rate process of the flotation column developed in this study is useful in predicting the collection zone recovery of fine coal, and for the flotation column scale-up.
- DOE Contract Number:
- FG22-90PC90314
- OSTI ID:
- 110016
- Report Number(s):
- CONF-950002-; ISBN 0-87335-130-4; TRN: IM9543%%318
- Resource Relation:
- Conference: International symposium on high efficiency coal preparation, Littleton, CO (United States), 1995; Other Information: PBD: 1995; Related Information: Is Part Of High efficiency coal preparation: An international symposium; Kawatra, S.K. [ed.] [Michigan Technological Univ., Houghton, MI (United States)]; PB: 465 p.
- Country of Publication:
- United States
- Language:
- English
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