herefore, proper heat treatment process should be selected according to the material of lining plate.However, in actual work, the relevant staff lacks the knowledge of lining material, so in heat treatment, the processing of lining is not enough, which not only does not play a strengthening role, but also makes the strength of lining lower. When hit by steel balls and materials, plastic deformation will occur. The unreasonable heat treatment process will also affect the yield strength of the lining plate, causing the vertical roller mill bolt to break under the action of huge shear force. Relevant staff also need to control the material quality and hardness of the lining plate, both of which need to be in accordance with the regulations, and make a reasonable match between the steel ball and the lining plate. For example, if the hardness of the steel ball is HRC37, then the hardness of the lining plate should be HRC43. According to the material and hardness of the lining plate, reasonable heat treatment process of the lining plate should be selected.