The operation principle of main unit of GTM Medium Speed Trapezium mill is that main unit runs with the central shaft that is driven by a gear box. The top of the shaft is connected with a quincunx stand on which a grinding roller is installed to form a swing support. The grinding roller not only rotates around the central axle and grinding ring but also rotates around its own axle due to the friction. There is a pallet knife system at bottem of quincunx stand. The pallet knife system is under the grinding roller. With co-rotation of pallet knife and grinding roller, pallet knife will lift the materials into the space between roller and ring to to form a material layer. The materials will be grinded due to the centrifugal force of roller and thus finally achieve the aim of making powder.
StructureThe standard configuration of GTM Medium Speed Trapezium mill includes main frame, classifier, decelarator, duct fan, bag duct collector, pipe connection, cyclone power collection device, motor and so on. The optional corollary equipments are jaw crusher, elevator, feeder electrical cabinet, etc. 1. Choose the super pressurization spring and resilient connection which has a damping effect. On this condition, the overall force point is improved by about 45% compared with other products. The resilient connection can reduce the vibration and noise, and avoid resonance so as to improve production efficiency.
2. Adopt the new wear-resistant materials to improve crushing efficiency, and extend the using life of the roller and the ring. The roller and ring are designed in inverted trapezium, which reduce the material's slip velocity between rollers and ring, extend grinding time, and enhance crushing efficiency and fineness.
3. Use the high-efficiency and energy-saving centrifugal induced draft fan. The efficiency of prismatic blade equipped on the traditional machine is only 62%, but the efficiency of the energy saving induced draft fan whose impeller and blade are both stamping is 90%. This increased the separating effect to a large extent.
4. Increased the density of the classifier's blades so that the production has been greatly increased compared with other machines with the same rotating speed and motor.
5. With good sealing performace, tha machine reduced the noise and vibration, enhanced the fineness of the products, and improved the working efficiency.
6. There is convenient impeller adjusting device. The clearance between housing and end of powder concentrator's blade also effects fineness. This patent technology is convenient to adjust the clearance. GTM Medium Speed Trapezium mill has been widely used in electric grinding, mining, metallurgy, chemical industry, steel, building materials, coal industry and so on, and has produced great economic and social benefits. Mainly used in the field of mining, building materials, chemical industry, metallurgy, power plant, coal industry, etc., the machine is suitable for non-flammable and non-explosive minerals whose Moh's hardeness is below 9.3, humidity is 6% and and the final product size can be adjusted as requied in the rang of 80-425meshes(even till 1000meshes), such as cement clinker (born), quartz, feldspar, calcite, dolomite, graphite, fluorite, wollastonite, phosphate rock, calcium magnesium phosphate, coal, gangue, slag, zircon sand, talc, granite, potash feldspar, marble, barites, ceramics, glass and other grinding materials of more than 1000 kinds. Bacause the machine takes the demand of desulphurizing powder into full consideration in its designing process, and can match well with the desulphurizing equipments, it is able to improve the desulphurizing efficiency and is an ideal desulphurizing powder equipment.

Model	Roller Number	Roller Diameter	Ring Diameter	Max Feed Size	Finished Size	Fineness of finished product (mm)			Power	Overall Dimensions
	(pcs)	(mm)	(mm)	(mm)	(mm)	0.125	0.075	0.044	(kw)	(LxWxH)(mm)
						Capacity(t/h)
GTM-320	4	Ø320x200	Ø980x200	25	1.6-0.033	3-8.8			37	7300X5920X8310
GTM-410	5	Ø410x240	Ø1320x240	30	1.6-0.033	6-13			75	9280X7350X9730
GTM-440	6	Ø440x270	Ø1600x270	35	1.6-0.033	13.0-22.0	12.0-18.0	10.0-17.0	132	12600X5790X8368