Pulverizer WikipediaWith adequate mill grinding capacity a vertical mill equipped with a static classifier is capable of producing a coal fineness up to % or higher <50 mesh and 80% or higher <200 mesh while one equipped with a dynamic classifier produces coal fineness levels of 100% <100 mesh and 95% <200 mesh or better In 1954 a Jet Pulverizer was developed in which operates like a Vertical Pulverizer