The operating efficiency of the cement mill is closely related to the cost of the entire production line, and the steel consumption of the grinding body and lining plate is one of the important factors affecting the efficiency of the cement mill. When the lining plate and grinding body are severely worn, the output capacity of the mill will be significantly reduced, resulting in an increase in unit power consumption for cement production. Therefore, it is crucial for cement production to effectively reduce the steel consumption of the abrasive body and extend the service life of the liner.

This paper will take the design of a 3.8m* 13m cement mill in a domestic cement factory as an example, and discuss the form design of the lining board, material selection and reasonable grading of the grinding body, hoping to provide some inspiration for the majority of cement mill users.

The mill is a circular flow mill with two grinding chambers, one of which is a rough grinding chamber and the second is a fine grinding chamber, and a double-layer compartment plate is arranged in the middle. Cement mills of this specification have been widely used in production lines ranging from 2,500 to 3,200 t/d.

Prior to this, the rough grinding bin of this mill usually used corrugated step liners, while the fine grinding bin mostly used double step grading liners. The advantages of the corrugated step liner are that it has strong lifting ability, excellent dribbling ability and crushing ability, and good crushing effect; but its disadvantage is that it has poor wear resistance, and the dribbling ability will be significantly weakened after the ripples are smoothed down. The double-step grading lining of the fine grinding silo provides ideal performance in terms of dribbling ability and ball grading effect. Since the average ball diameter of the rough grinding silo is larger and the impact force is stronger than that of the fine grinding silo, the liner life of the rough grinding silo is generally short, usually one year, and some cement factories cannot even reach this service period. In response to this situation, we decided to optimize and improve the corrugated step lining of the rough grinding silo.

According to feedback, regular grooves will appear on the corrugated step lining plate in the later stage of work. We decided to optimize and improve on this basis. Since the rough grinding silo lining needs to have greater lifting capacity, we plan to use ring groove stepped lining.