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Polysius vertical roller mill (RM type vertical roller mill) 3-6 are polysius vertical roller mill structure schematic diagram, with surface grinding roller and a bow shaped disc, each grinding and by two narrow roller and installed together, the grinding roll with rotating disc movement, grinding and two rollers can respectively adjust speed with respect to the lap. Roller pressure is adjusted by hydraulic pressure to provide the required grinding pressure. Coarse part after grinding edge down, unloading the external bucket elevator. Hoist and return to the mill. Inside the mill has crushed material is moved to the edge of the disc, where there is a circle of wind mouth, air flow will be material to bring into the separator, the fine powder collecting in electrostatic precipitator in. The advantage of this process is that the air flow is less, so the wind speed of the mouth is lower.
E type mill (also known as Bob here cork grinding, grinding Babcock, namely roll milling, also known as universal type vertical roller mill) global type vertical roller mill is shown in Figure 3 - 9. This kind of mill is used for the preparation of coal powder, mainly by the grinding chamber, the separator and the transmission mechanism. Grinding chamber is formed by the grinding ring, under the slewing ring, the ring is fixed, with adjustable spring, hydraulic device or a hydraulic and gas device pressure on the ring, make each other close to the top of a grinding ball, like ball bearings ball in the upper ring and the lower ring rolling. Feeder to grinding material from the upper part through the separator or from the side through the mill shell feeding grinding chamber, and then rely on figure 3-7 cone roller - dish - spring pressure type vertical roller mill 1 wheel deceleration 3 - 2 - vertical grinding bowl of 4 - and 5 - separator mill 10 heart from the materials are flung to the ball, grinding product is discharged from the periphery of the grinding device and by rising air flow into separator. After separation of coarse material return grinding chamber, and fine powder is with the air discharge outside the mill. The wear of high wear-resistant cast steel made of hollow spheres, according to the different specifications of the mill, the ball up to 500mm.