Oct 30, 2020 After the pulverizing system has been started, open the rod valve at the bottom of the raw coal bunker, start the sealed metering belt coal feeder, and the raw coal enters the vertical coal mill for drying and grinding. The hot air or waste gas from the hot blast stove is drawn by the fan of the system and enters the vertical coal mill. After sufficient heat exchange with the ground coal in the mill, the pulverized coal Mar 09, 2013 Working principle of stone micronizer HGM series stone micronizer mainly consist of main unit, classifier, powder collector, dust cleaner, blower, muffler, sound Classifying Equipment working principle kefid Crusher mobile Learn More About Kefid C6X Series Jaw Crusher. 1.Optimizing crushing chamber and trajectory parameters of moving jaw can get reasonable inertial moment and crushing stroke, and higher efficiency will be obtained when energy consumption is equal to others.