... wollastonite, phosphate rock, calcium magnesium phosphate, coal, gangue, slag, zircon sand, talc, granite, potash feldspar, marble, barites, ceramics, glass and other ... efficiency and is an ideal desulphurizing powder equipment. High pressure trapezoid mill Technical parameters ModelRollerNumberRollerDiameterRingDiameterMaxFeedSizeFinishedSizeFineness of finished product(mm)PowerOverallDimensions ...