... , feldspar, calcite, dolomite, graphite, fluorite, wollastonite, phosphate rock, calcium magnesium phosphate, coal, gangue, slag, zircon sand, talc, granite ... desulphurizing efficiency and is an ideal desulphurizing powder equipment.High pressure trapezoid mill Technical parametersModelRollerNumberRollerDiameterRingDiameterMaxFeedSizeFinishedSizeFineness ... 0-22.012.0-18.010.0-17.013212600X5790X8368