... a grinding roller is installed to form a swing support. The grinding roller not only rotates around the central ... powder. Structure The standard configuration of GTM Medium Speed Trapezium mill includes main frame, classifier, decelarator, duct fan, bag ... , phosphate rock, calcium magnesium phosphate, coal, gangue, slag, zircon sand, talc, granite, potash feldspar, marble, barites, ceramics, glass and ...