### Ball Charge And Grinding Efficiency

Also with low ball charge slurry pool will reduce grinding efficiency. beside lower ball charge will increase p80 of ball mill because of less number of impacts but mean residence time will increase by lower ball charge because of more volume to occupy. i think at.Apr 29, then in ball-wear formula (25), t = 6.9/k log10 da/db; but from (29), k = rt/wt. then t = 6.9wt/rt log10 da/db t is 1 day, wt is the original weight of the ball charge, and rt is the ball wear for one day. then log10 da/db = rt/6.9wt are all known, and it is only necessary to solve for db, the diameter of the balls to be.