Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
234069 | Minerals Engineering | 2011 | 5 Pages |
Abstract
A methodology for characterising shear rate profiles in tumbling mills based on in situ trajectory fields from Positron Emission Particle Tracking (PEPT) experiments is presented. Experiments were carried out in a laboratory scale mill fitted with lifter bars, pulp lifters and a discharge grate, and run with radioactively labelled particles within re-circulating slurry environments. Using time-averaged velocity distributions of small PEPT tracers, a model for tangential velocity profiles along radial scan-lines is proposed from which the shear rates are derived.
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
I. Govender, N. Mangesana, A.N. Mainza, J.-P. Franzidis,