研磨体的反分级现象导致磨机不能正常生产，细度难以控制。
The negative grading phenomena will lead to abnormal operation of the mill, and the fineness could hardly be controlled.
生产实践表明：有效减少了系统过研磨、提高了研磨效率和分级效率。
Results showed the excessive milling is reduced, the efficiency of milling and classifying are obviously improved.
合理地设置了多 道活化分级衬板，使研磨体分级更合理。
The multi-channel activation sizing liner is reasonably arranged to enable the classification of milling bodies to be more reasonable.
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