T. Yokoyama et al., SIMULATION OF BALL BEHAVIOR IN A VIBRATION MILL IN RELATION WITH ITS GRINDING RATE - EFFECTS OF FRACTIONAL BALL FILLING AND LIQUID VISCOSITY, International journal of mineral processing, 44-5, 1996, pp. 413-424
Citations number
7
Categorie Soggetti
Mineralogy,"Mining & Mineral Processing","Engineering, Chemical
The motion of balls in a two-dimensional vibration mill was investigat
ed by means of a simulation method called Discrete Element Method, whi
ch made it possible to calculate the intensity and frequency of ball c
ollisions. The effects of vibration conditions and fractional ball fil
ling on the characteristics of ball collisions and the grinding rate w
ere investigated by the simulation as well as the grinding experiment.
Taking account of the strength of particles to be ground, effective b
reaking collision frequency was defined as the frequency of ball colli
sions greater than the particle breakage strength and compared with th
e grinding rate experimentally obtained. These results from the simula
tion and the grinding experiment agreed well regardless of the grindin
g conditions, Furthermore, the effects of the viscosity of liquid in t
he mill pot on the movement of balls, intensity and frequency of ball
collisions were quantitatively discussed for a special case where the
mill pot was completely filled with the liquid and balls.