Ball mill; DEM; Discrete Element Method; Liner wear
Abstract :
[en] generic procedure to predict the wear evolution of lining
surfaces, namely the spatial distribution of wear and the progressive
modification of the geometry due to wear, is introduced in the context of
shell liners in ball mills. The wear data is accumulated on the surface
of the liner by 3D discrete element method (DEM) simulations of the ball
charge in an axial slice of the mill, which is either closed by a
periodic boundary condition or by frictionless end walls. The
calibration of this wear data with the measured wear profiles of the
shell liner in a 5.8 m diameter industrial cement tube mill shows that
the tangential damping energy defined by the linear spring-slider-damper
DEM contact law is the best fitting wear model of 6 different models.
The gradual update of the liner shape delivers adequate results for
liners without an axial height variation, while the accuracy of fully
variable geometrical modifications is limited by the computation time.
Nevertheless, detailed phenomena, like the creation of grooves in the
liner, were for the first time numerically modeled.
Disciplines :
Mechanical engineering
Author, co-author :
Boemer, Dominik ; Université de Liège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Ponthot, Jean-Philippe ; Université de Liège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Language :
English
Title :
A generic wear prediction procedure based on the Discrete Element Method for ball mill liners in the cement industry
Publication date :
2017
Journal title :
Minerals Engineering
ISSN :
0892-6875
Publisher :
Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom
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