With the rapid advancement of the social economy in the field of ultra-fine powder processing, more and more ultra-fine powder application requirements, the traditional ultra-fine powder processing equipment has been difficult to meet market demands due to the low productivity. Low production capacity has seriously restricted the development of modern ultra-fine powder processing enterprises. In response to the current market demand, our factory combines many years of grinding machine production experiences, introduces Taiwan and Germany ultra-fine vertical grinding technology, designs and develops thie vertical grinding mill for powder. New ultra-fine grinding equipment, grading, conveying, secondary powder selection and finished product packaging .The product fineness can reach 400-3000 mesh, breaking through the ultra-fine powder processing capacity.
Ultra-fine vertical mill can be widely used in chemical, metallurgical, non-metallic minerals and other industries, especially in the field of ultra-fine grinding of white non-metallic minerals, with outstanding performance, the powder made by it can be used in paper, paint, plastic, high quality fillers and additives are available in the rubber, PVC, ink and other industries. This vertical mill can be widely used in calcite, marble, limestone, dolomite, barite, talc, kaolin, dolomite, wollastonite, gypsum, feldspar, pyrophyllite and other non-metallic minerals of large-scale ultra-fine dry powder processing.
In the case of the same fineness of the finished product and the same motor power, the output of the jet mill, the agitator mill and the ball mill is more than double.
Consumable parts have a long service life
The grinding roller and the grinding ring are forged by special materials, so that the utilization degree is greatly improved. Generally, it can last for more than one year. When processing calcium carbonate and calcite, the service life can reach 2-5 years.
High safety and reliability
Since there is no rolling bearing or screw in the grinding chamber, there is no problem that the bearing and its sealing member are vulnerable, and there is no problem that the screw is loose and the machine is destroyed.
Environmentally friendly, clean
The dust collector is used to capture dust, and the muffler is used to reduce noise, which is environmentally friendly and clean.
Structure and composition
Vertical mill is mainly composed of electric motor, reducer, grinding wheel , rolling plate , pressing device, classifier, feeding screw, oil station, main engine and electronic control system.
The main motor drives the grinding wheel through the reducer, and the airflow produced by the high-pressure fan enters the main machine from the tuyere. The material is fed into the vertical grinding machine through the feed screw and falls into the center of the grinding disc. Under the action of the centrifuge, the material is scattered from the center of the grinding disc. When it passes through the roller table area on the platen, it is subjected to the roller pressure, and the bulk material is directly crushed. After the small particles are pressed, the particles are ground and further pulverized until the powder is formed. The powdered material continues to move toward the edge of the mill until it is carried away by the strong airflow from the air inlet. When the material in the airflow passes through the upper classifier, the coarse particles fall back into the mill under the centrifugal force generated by the high-speed rotating impeller. Grinding, the qualified powder is collected by the dust collector after passing through the powder selection system, which is the finished product.
|Testing product||Super fine ground calcium carbonate|
|Specific surface area||cm2/g||11000±500||135000±500||15000±500||17000±500||19000±500|
|325 mesh residual||％||0.015||0.015||0.01||0||0|
|Less than 2 μm||％||34||38||46||53||60|
|Average grain diameter||μm||4.2||3.0||2.4||1.8||1.4|
|D97 size distribution||μm||30||25||20||15||9|
|Cut point of grain size||μm||80||48||38||28||18|
|1. Size distribution: use the particle size analyzer of MALVERN 3000.|
2. Specific surface area: average grain size exchange. Unit is the relative area of 1g powder.
3. Average grain size: size distribution get the median of grain size.
4. 325 mesh residual: use the wet-type method to put the 1000g powder the through 325 mesh screen, calculate the percentage.
5. Moisture: testing the 5g powder in the 150℃ within 6 minutes, measure the verification.