Charge motion model for vibration mills with high excitation

The charge motion determines the power draft, the stressing intensity and p robability, the mixing kinetic, the internal material transport, and by all that the performance of a vibration mill. Excitations higher than usual (a cceleration number <10, relative amplitude <3%) change the motion pattern b ecause the charge impacts against the upper shell part. The power draft doe s not longer obey the known relations. A simple model is established for de scribing approximately the charge motion in such a way that the power draft can be predicted. The key point in the model is the consolidation phase of the charge after impacting, which delays the charge take-off. This effect was quantified with experimental observations. The model does not need any additional parameter for adjusting it to the reality.