期刊
MINERALS ENGINEERING
卷 24, 期 5, 页码 442-448出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.mineng.2010.12.007
关键词
Flotation kinetics; Hydrodynamics; Modelling
资金
- CSIRO Process Science and Engineering
- AMIRA International Limited
A computational fluid dynamic model has been developed for a modified Denver flotation cell used in laboratory batch tests. The model incorporates fundamental aspects of bubble-particle interactions including bubble-particle collision, attachment and detachment. Model predictions are compared against carefully planned laboratory experiments with narrowly-sized spherical ballotini. Flotation results for different impeller speeds have been obtained for a constant air flow into the cell. The particles have been made hydrophobic by methylation with trimethylchlorosilane. For a given particle size, the results from the model and experimental work indicate that there is an optimum stirring speed that produces a good compromise between attachment and detachment rates in the cell for flotation. For less hydrophobic particles, a lower stirring speed is beneficial in having a longer contact time because of the longer induction time required for attachment. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
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