PRM vertical roller mill

( vertical pre grinding mill )

PRM type rolling mill by three symmetrical rotating roller under high pressure, with the disc rotation of the disc material on the shear, extrusion crushing and grinding, its unique roller shape design and material layer grinding technology, greatly reducing the unit energy consumption, widely used in building materials, metallurgy, chemical industry material grinding process. With the existing mill composed with cycle pre-grinding, circulating grading pre grinding, end milling system. Comprehensive energy consumption reduced by 30% - 40%, production increased by 50% - 100%, to achieve energy saving and emission reduction and efficient grinding high yield, low cost, high economic and social benefits.

PRM vertical roller mill is composed of motor, speed reducer, grinding disc, grinding roller, a hydraulic device, lubricating device. Material in the entrance into central valve disc, the disc to rotate and generate centrifugal force, the material is thrown into the grinding area, by pressure grinding roller and grinding material extrusion. The crushed materials after grinding outer ring grinding, fall into the lower shell, by scraping plate scraping into the cutting discharge.

System process features:

1, roller adopts forced lubricating mode, effectively prevent the dust into the bearing, using forced ventilation gas seal with skeleton seal double sealing mechanism.

2, The disc lining board and a roller leather with high chromium cast iron, long service life ( > 30000Hr ), and easy replacement.

3, speed reducer adopts hydrostatic lubrication system, oil pressure, oil temperature of the thrust bearing and the implementation of sensor monitoring, ensure the operation stability.

4, hydraulic oil station using intermittent, follow-up work, set up advanced servo monitoring element, the running state of the equipment were uninterrupted, continuous detection, improve the system operating conditions, extend component life.

5, increase production and reduce consumption, obvious effect. The use of the device of grinding process, realize the extrusion and shear force grinding new technology popularization and application, than the existing roller grinding results in higher. Can make the cement raw material mill production capacity increased by 100%, cement clinker production capacity increased by 50%, reduce power consumption by 30% - 40%, with the ball mill grinding system composition, the product fineness and wide adjustment range, effective improve the compressive strength of cement.