vertical roller mill, also known as vertical mill, vertical mill, or a vertical mill, vertical milling machines, vertical milling machine and so on. It works by rotating disc motor reducer drive, while wind from the inlet into the mill, the material falls from the inlet disc center. Due to the centrifugal force, the material moves to the edge of the disc, passes through the annular groove on the disc, by the rolling mill rolls and grinding, and continue to move to the edge of the disc. Until it is brought up at the air ring, big stars expected to re-direct fall back on disc grinding. The gas stream passes through the separator material, in the role of the guide vanes and the rotor, the coarse material from the hopper fall on the stack disc, together with the grinding of the fine powder with the air. Collect dust collection device in the system, namely the product. By adjusting the angle and wind vane separator rotor speed, you can get different fineness of the product. It is a medium-speed coal mill is widely used in the power plant blast bituminous coal grinding system applications.
The main features of vertical roller mill system: the use of advanced generalized vertical mill system can set the mill grinding, grading and drying as one of the high moisture material may pass into the hot air drying, no cyclone directly efficient dust collector to collect fines, short process, the system is simple, do not need multi-plant; low power consumption, compared with milling or Raymond system saving about 40%; less products by iron, long consumable life; equipment operation low noise, sound equipment operating below 85dB, far less than the mill, Raymond noise; dust-free environment, the system runs at atmospheric pressure or vacuum sealed state, no mineral loss, fully able to control air emissions in the state within the range. The system uses computer integrated control, continuous and automated production, safe, reliable, stable product quality, operating rate.
Advantage of the generalized vertical mill analysis: generalized vertical mill body with dynamic separator, use of electric CVT, by the governor, the fineness of the powder product can be used as a linear regulator. Generalized vertical roller mill uses hydraulic pressure, the pressure continuously adjustable with stopper, which can effectively prevent direct contact platen roller, to avoid strong vibration mill occur under normal circumstances, which are not broken material, reduce grinding wear. Roller tire shape that greatly reduce sliding wear and prolong life. Using two roll structures. A large space within the mill, roller mill hydraulic device is available outside of the body to replace or repair pulls out for easy maintenance. With thin oil circulating lubrication, greatly improving the life cycle of the bearing and the operation rate of the machine. Grinding roller and grinding outer bearing seal to atmosphere, free from the influence of the dust of the ground, so no configuration sealed fan, can reduce oxygen levels and energy consumption within the mill sealed fan.
Generalized vertical mill system, the typical process: raw material - Crusher - raw material bucket - belt machine - grinding warehouse - Feeder - generalized vertical mill grinding - bag filter - screw the feeder. After the raw materials from the former yard crusher broken through to around 30mm, the belt conveyor into the magnetic separator to remove metallic foreign bodies from the rotary air lock feeder intake (both hot spills and prevent the system from the inlet feed dual role ) enter GYLM generalized mill grinding; put into the mill after the wind reaches a certain fineness of limestone powder, into the upper part of the mill site classification by classification means the wind flour mixture to the required fineness into the air box pulse dust collector is separated from the product and wind, finished warehousing. Part of hard slag from the lower part of the mill slag discharge port from outside the circle of bucket elevator conveyor belt raised to re-enter the system. Vertical mill as a medium-speed coal mill, is widely used.