coal char classifier mill,Performance Driven Maintenance of Coal Pulverizers - Storm .Classifier. • Non – Optimum Mechanical Adjustments. • Poor Fuel Balance. • Non-Optimum Contour Grinding Elements. Our Point: If Coal Fineness is not . Fineness Testing should be used as a trigger for maintenance on mills. . With zero on 50 Mesh, then 3 more screens are needed to plot on Rossin-Rammler Chart.coal char classifier mill,Coal mill pulverizer in thermal power plants - SlideShareNov 17, 2012 . Sieve distribution chart & Fineness testingscreen - Plot of coal fineness on Fineness testing screen Rosin and Rammler; 22. . Erosion in Pulverizer Erosion by mineral particles picked up in the air stream carrying pulverized coal through the mill, classifier, exhauster, and transport pipe is a recognized.