Experimental Investigation of Size Match of Grinding Media for Ball Mills

A majority of practical mehods of calculating size match of grinding media for ball mills were compared by means of grinding experiments. The results show that, determination of rational grinding media size match should begin with selecting single size media of suitable diameter on basis of feed particles size distribution, and then calculate mass percentage of each size grinding media, which should be in accordance with the fraction of corresponding feed particle size. However, in such case that the fraction of coarse particles in mill feed is low, the grinding time last long, and the slurry viscosity is high, it is necessary to increase the mass fraction of larger media with all size media having the same mass percentage, which can decrease negative effect of high viscosity on grinding and increase grinding efficiency.