By using the isokinetic sampling method with zero-pressure pendulum probe

the samples of pulverized coal have been taken from the outlet pipeline of ZGM medium speed coal pulverizer.Through analysis of the fineness and mass for pulverized coal

the influence of some major factors upon the operating characters of said coal pulverizer

such as the damper opening degree of classifier

the primary air flow rate

the hydraulic loading force of grinding rolls etc.

have been understood.Analysis shows that the effective adjusting range of classifier is within 45°~65°

the corresponding fineness of pulverized coal R90 varying within 10%~40%;the damper opening degree of said classifier has comparatively remarkable influence upon the ventilation resistance and the specific consumption of coalpulverizer;and the air flow rate affects the output capacity of coal pulverizer

the fineness of pulverized coal

and the power consumption of coal-pulverizing system

etc..Under condition of satisfying the requirements of output capacity of coal pulverizer

the loading force should be reduced as possible.