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Experimental and Numerical Study of Grinding Media Flow in a Ball Mill
Author(s) -
Machado Marcela V. C.,
Santos Dyrney A.,
Barrozo Marcos A. S.,
Duarte Claudio R.
Publication year - 2017
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201600508
Subject(s) - specularity , grinding , drum , coefficient of restitution , mechanics , ball (mathematics) , mill , ball mill , flow (mathematics) , materials science , simulation , mathematics , engineering , physics , mechanical engineering , optics , geometry , metallurgy , specular reflection
An experimental and numerical study on the grinding media dynamics inside a baffled ball mill under different solid‐flow regimes, namely, cascading, cataracting, and centrifuging, is described. The Eulerian approach was used for all simulations and the boundary condition at the drum wall was investigated by means of the specularity coefficient parameter. This effort is an important approach in representing the particle‐wall interaction in a ball mill. The restitution coefficient of the balls was experimentally measured using a video camera, and its influence was evaluated by comparing the numerical and experimental outcome of flow patterns. The simulations results proved that the specularity and restitution coefficients effects at the drum wall were more evident at high rotational speeds.