PROCESS DIAGNOSTIC STUDIES FOR CEMENT MILL .meters, around 5 broken/damaged liner plates were observed. •. Empty heights of both the chambers measured to calculate the ball charge, % filling and estimate the power consumption at mill shaft. Based on the empty height measurements, charging of grinding media in. Chambers I & II calculated as equivalent to degree.empty height of ball mill and power,Impact Load Behavior between Different Charge and Lifter in . - MDPIJul 31, 2017 . the measured power draw has a maximum value. Increasing the grinding media filling increases the power draw and increasing the lifter height does not lead to any variation in power draw. Keywords: DEM simulation; load behavior; impact force; power draw; ball mill. 1. Introduction. A ball mill (Figure 1) is.