Computational Modelling

Granular Flow - Application

Charge motion in a rotating ball mill

Contact personnel:  P.W. Cleary

The efficiency of ball mills and the wear characteristics of the liner are of enormous economic importance to the mining and quarrying industries. A number of fundamental characteristics of ball mill operation has been examined via two-dimensional DEM simulations (see also 3D simulations).

	A 5 m ball mill with 23 lifter bars rotating clockwise at 80% of the critical speed filled with 75, 100 and 200 mm non-circular particles is shown here. The non-circularity causes dilation in the shearing avalanche region.
	The same mill filled with rocks (5 to 50 mm) and balls (50 to 200 mm) rotating at 110% of critical shows very clear radial segregation (77%).
	Lifter bar profile after 5,000 hours of operation predicted from wear calculated by the DEM model.

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last updated July 18, 2007 05:25 PM

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