... 4. high classification 1. OperationPrinciple WF series fine powder classifier machine is composed by upper chamber, airseparator, lower ... particles will drop back to the chamber while fine ones will move up toclassifier wheel, with the ... part of the coarse particleswill be discharged by fine product nozzle, and coarse ones will be dischargedby ... *1.10*1.78 WF series fine powder classifier machine