electroacoustic supervision of the filling level in ball grinding mills pdf

Mar 11, 2002 The most efficient breakage occurs in a mill (for dry grinding) when the powder fills about 80% of the spaces between the balls . Too low a filling means that the balls collide more often, increasing the rate of media wear and wasting energy by increasing the alumina-on-alumina contact. Too high filling gives a cushioning effect, i.e. if the ...