Abstract: The paper presents a technical scheme combing with the fuzzy control and PID control and emphasizes the basic principles of fuzzy control, the PID control algorithm and its application on grinding and classification. Based on the production practice, the original complex model is optimized, realizing an effective control on grinding. This scheme can effectively avoid the occurrence of over-load and under-load of the mill, maintain all work index of the mill, and ensure the control system to be reasonable and economical. The implementation of this project opens up a new way for realizing an effective control in grinding and classification.

Key words: Fuzzy control, Grinding and classification, PID