Ultrafine Grinding Mill with 21 rollers for 400-2500 mesh powder
Working Principle of Ultrafine Grinding Mill:
Elevator conveys the crushed material (usually less than 10mm) to
the feeding hopper, which will be feed into the grinding house by
the belt conveyor or screw conveyor. In the grinding house, there
are three or four layers of roller and rings to grinding the
material step by step. The grinding rollers on the rotary table
rotate with the help of central shaft. And there is a flexible gap
between roller and ring. When the ultrafine grinding mill works,
the rollers will move towards the ring because of centrifugal
force. The rollers also rotate around the pin by themselves. The
material will be ground the roller and ring. The grinding and
crushing comes from the centrifugal force of the grinding roller.
And the ring hardness, precision and wear-resistance ability are
also important to the grinding force. So the material goes through
the gap between the rings and rollers in 3 or 4 layers one by one.
The material can be ground into ultrafine powder with higher
sieving rate.
The ultrafine powder with required fineness go through the
classifier into the pulse-jet collector, and the coarse powder will
be fallen down into the grinding chamber to be reground. And the
temperature in the grinding house can also be controlled by our
special system to improve the whiteness of the powder
Special Features of Ultrafine Grinding Mill:
1. Perfect contact between rollers and ring: The arc or curved
surface increases their effective working surface and improves the
crushing efficiency. The rollers and rings contact surface and
shapes should be consistent and tightly fit, which is good to the
production of fine powder.
2. Improved hardness of rollers and rings: this not only guarantees
longer working life, but also the powder is not easy to be
contaminated.
3. Rotation speed of central shaft can be adjusted according to
customer’s requirement.
4. Pulse-jet Collector: 99.99% of the ultrafine powder can be
collected, which is also environment-friendly.
Application Range of Ultrafine Grinding Mill
Ultrafine Grinding Mill is widely used to grind any non-metallic
minerals with Moh’s hardness below 7 and moisture below 6%, such as
talc, calcite, calcium carbonate, dolomite, bentonite, kaolin,
graphite, carbon black etc.. The fineness can be adjusted from
0.045mm(325 mesh) to 0.005mm(2500 mesh), whose range is much wider
than that of traditional Raymond Mill.
Technical Data of Ultrafine Grinding Mill:
