1Department of Physics, University of Cape Town, South Africa
22Associate Member, National Institute for Theoretical Physics, South Africa
3Department of Chemical Engineering, University of KwaZulu-Natal, South Africa
4Department of Chemical Engineering, University of Cape Town, South Africa
*Corresponding author: Tupper GB, Department of Physics, University of Cape Town, South Africa, Email: email@example.com
Submission: March 19, 2018; Published: March 29, 2018
ISSN: 2578-0255Volume1 Issue4
We develop a simple granular flow model for the dissipative power density and power draw in dry tumbling mills. The model is based on a Herschel-Buckley like granular rheology with a yield stress proportional to the pressure. Data obtained from Positron-Emission-Particle-Tracking is used to correlate dependence on fill, speed and lifters.
The shrinking core model for the diffusion was established to control the mechanism with surface chemical reaction as the rate controlling step for the dissolution process.
Keyword: Power; Efficiency; Granular; Rheology; PEPT