Abstract: In view of the unreasonable configuration of ball mill grinding body in cement grinding system and the high power consumption of main motor caused by the long-term low speed operation of the mill, energy-saving technology transformation was carried out. By replacing part of the steel ball grinding body in the second bin of the ball mill in the cement grinding system with ceramic balls, and adding frequency converter to the main motor to precisely control the speed of the ball mill, the working efficiency of the ball mill is improved and the energy consumption is significantly reduced. After the technical reform, the current of main motor and the temperature of cement grinding are significantly reduced, and the quality of finished cement is stable. At the same time, after using the frequency converter， the output of the ball mill increased by about 40t/h, and the single consumption of the main motor of the ball mill decreased by about 1.3kW·h/t, electricity costs was saved by about 1.06 million yuan every year, and the investment recovery cycle is 1.01 years.
