HGM Series of Three-rings and Medium-speed Micro-powder Grinder is widely used in making fine powder or ultra-fine powder, and the raw materials should be non-inflammable and non-explosive under the Moh's hardness less than 6 grade such as limestone, calcite, dolomite, kaolin, bentonite, talc, illite, pyrophillite, barite, meerschaum, fluorite, potash ore, etc. The lifetime of spare parts is relied on the hardness of raw materials, and is lowered once the Moh's hardness is up to 4-6 grades. Working Principle of HGM series Three-rings and Medium-Speed Micro-powder Grinder: The material in the Silo will fall down into the Feeding tube evenly through the Vibrating Feeder, and then fall onto the upper scattering plate, after that will scatter on the gap between the roller and ring. The material into the inner wall of the rollers will be reground, and then fall down onto the lower scattering plate. And the fine powder conforms to the standard will be discharged into the Dispersive Twin-pipe Cyclone Separator, and then be discharged. And the massiveness will enter the grinding wall to be reground. The air current with the dust will enter into the lower part of the Pulse Bag Dust Catcher, and then be discharged through the Rotational Discharging Device after filtering dust. Specification and Technical Parameter: Model HGM60 HGM80 HGM100 Average Diameter (mm) 600 800 1000 No. of Roller and Ring Roller(Pcs) 15 21 27 Ring(Pcs) 2 2 2 The Feeding Size(mm) ≤10 ≤10 ≤10 Size of Finished Product Micron 5-47 5-47 5-47 Mesh 3250-325 3250-325 3250-325 Capacity(kg/h) 350-2500 600-4000 900-6000 Motor Power (kw) Main Mill 37 55 90 Classifier 11 18.5 30 Air Blower 30 45 75 Vibrating Feeder 0.06 0.06 0.15 Discharge Valve 0.75 0.75 1.1 Dimension ( L× W × H )( m ) 10×3×5.5 11.9×2.7×5.8 15.5×4.5×8.6 Weight of Main Mill and Classifier(kg) 5200 7000 9500 We manufacture and sell jaw crusher,impact crusher,cone crusher,high pressure mideum speed grinder,raymond mill.ball mill,sand making machine,vibrating screen,vibrating feeder,roller mill,cement mill,stone crusher,grinding mill,aggregate crusher. if you have any question,plz kindly contact me,I will reply to you asap. msn:yang_dajia@hotmail.com email: vipeak_yang@Yahoo.cn And if you are interest in it ,plz visit our webside: http://www.crushingmill.com/Suspension.html http://www.grinderpro.com/Suspension.html http://www.vipeakgroup.com/Suspension.html http://www.grinderpro.com/product.html grinding mill http://www.grinderpro.com/HGM.html powder mill