Improved experimental tracking techniques for validating discrete element method simulations of tumbling mills

2004 ◽  
Vol 44 (6) ◽  
pp. 593-607 ◽  
Author(s):  
I. Govender ◽  
A. T. McBride ◽  
M. S. Powell
Keyword(s):  
Discrete Element Method ◽  
Discrete Element ◽  
Tumbling Mills ◽  
Element Method

Contributions to the experimental validation of the discrete element method applied to tumbling mills

2004 ◽  
Vol 21 (2/3/4) ◽  
pp. 119-136 ◽  
Author(s):  
Andrew McBride ◽  
Indresan Govender ◽  
Malcolm Powell ◽  
Trevor Cloete
Keyword(s):  
Discrete Element Method ◽  
Experimental Validation ◽  
Discrete Element ◽  
Tumbling Mills ◽  
Element Method

Mechanics of media motion in tumbling mills with 3d discrete element method

1997 ◽  
Vol 10 (2) ◽  
pp. 215-227 ◽  
Author(s):  
S. Agrawala ◽  
R.K. Rajamani ◽  
P. Songfack ◽  
B.K. Mishra
Keyword(s):  
Discrete Element Method ◽  
Discrete Element ◽  
Tumbling Mills ◽  
Element Method

scholarly journals Industrial Vertical Stirred Mills Screw Liner Wear Profile Compared to Discrete Element Method Simulations

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 397
Author(s):  
Priscila M. Esteves ◽  
Douglas B. Mazzinghy ◽  
Roberto Galéry ◽  
Luís C. R. Machado
Keyword(s):  
Discrete Element Method ◽  
Wear Behavior ◽  
Scale Up ◽  
Discrete Element ◽  
Maintenance Planning ◽  
Wear Measurement ◽  
Velocity Scale ◽  
Tumbling Mills ◽  
Industrial Measurement ◽  
Element Method

Vertical stirred mills have been widely applied in the minerals industry, due to its greater efficiency in comparison with conventional tumbling mills. In this context, the agitator liner wear plays an important role in maintenance planning and operational costs. In this paper, we use the discrete element method (DEM) wear simulation to evaluate the screw liner wear. Three different mill rotational velocities are evaluated in the simulation, according to different scale-up procedures. The wear profile, wear measurement, power consumption, and particle contact information are used for obtaining a better understanding of the wear behavior and its effects on grinding mechanisms. Data from a vertical stirred mill screw liner wear measurement obtained in a full-scale mill are used to correlate with simulation results. The results indicate a relative agreement with industrial measurement in most of the liner lifecycle, when using a proper mill velocity scale-up.

Discrete element method to model cracking for two layer systems

TAPPI Journal ◽  
2019 ◽  
Vol 18 (2) ◽  
pp. 101-108
Author(s):  
Daniel Varney ◽  
Douglas Bousfield
Keyword(s):  
Discrete Element Method ◽  
Flexural Modulus ◽  
Single Layer ◽  
Discrete Element ◽  
Flexural Stress ◽  
Layer System ◽  
Three Point Bending ◽  
Moving Force ◽  
Coating Layers ◽  
Element Method

Cracking at the fold is a serious issue for many grades of coated paper and coated board. Some recent work has suggested methods to minimize this problem by using two or more coating layers of different properties. A discrete element method (DEM) has been used to model deformation events for single layer coating systems such as in-plain and out-of-plain tension, three-point bending, and a novel moving force picking simulation, but nothing has been reported related to multiple coating layers. In this paper, a DEM model has been expanded to predict the three-point bending response of a two-layer system. The main factors evaluated include the use of different binder systems in each layer and the ratio of the bottom and top layer weights. As in the past, the properties of the binder and the binder concentration are input parameters. The model can predict crack formation that is a function of these two sets of factors. In addition, the model can predict the flexural modulus, the maximum flexural stress, and the strain-at-failure. The predictions are qualitatively compared with experimental results reported in the literature.

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