Classify Liner refers to the general name of the liner in which the grinding ball can play a grading role in the axial direction of the mill.

For a node, the rising part is very effective in lifting the grinding body, and the falling part is somewhat unfavorable. It may cause some sliding of the grinding medium, but it can avoid the undesirable phenomenon of throwing up some grinding medium too high.

Step Liner has a special shape, which not only makes the grinding medium and the liner has friction, but also increases the adhesion between the medium and the liner. Step liner is suitable for the grinding chamber of the mill.

It is a convex edge cast into a semi-circular or trapezoidal section on a flat lining board. The function of the convex edge is the same as that of the layering, and its structural parameters are similar to those of the layering liner.

After a systematic study on the formation of grooved liner, it is found that if a certain form of groove can be used, it is beneficial to the utilization of motor power. Based on this view, and led to the development of grooved liner.