Grinding Mill
Micro Powder Mill

Micro Powder Mill

HGM series Micro Powder Grinding Mill absorbed the European advanced technology and many engineers' ripe experience, combining with the actual requirement and proposal of our customers', have been developed on the basis of our professional engineers' hard researching. It is mainly applied to grind non-inflammable, non-explosive and brittle materials with Mohs hardness under six.


Such as calcite, chalk, limestone, dolomite, kaolin, gypsum, etc, totally more than 100 kinds of materials.Product fineness can be controlled between 0.047mm (47 micron) and 0.005mm (5 micron)

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 Working Principle:

The main motor drives main shaft and every layer rotating by reducer. Turn plate drives numbers of rollers rolling and rotating in the ring by pintles. Big materials are crushed into smaller particles by hammer crusher. Then they are sent to storage hopper by bucket elevator.
The electro-magnetic vibrating feeder feeds the material evenly to the distribution plate which is on the upper turnplant. Under the function of the centrifugal force, the material scatter to the side of the circle and fall into the ring to be pressed, crushed and milled into pieces by rollers. After the first crush, materials fall into the second and the third layer. The pumping of the high-pressure centrifugal blower put the outside air into the machine. The coarse powder will be brought into the classifier. The rotating turbine in the collector makes the coarse particles fall back for regrinding. The fine particles will come into the cyclone collector with the airflow and discharged by the discharging valve on the bottom of the collector. They are the final products. The airflow with little dust will be discharged through blower and muffler after being purified by the cyclone collector.
Performance and features:
1. High efficiency
Compared with jet mill, agitation mill and ball mill, if the fineness and motor power is the same, its product capacity is twice than others.
2. Longer lifetime of spare parts
The roller and ring are made of special material, which improve the grinding efficiency a lot. For same material and final size, the lifetime of its wearing parts can reach to more than one year, about 2-5 times as long as that of vertical shaft impact crusher and turbo-mill. Especially when handling calcium carbonate and calcite, the lifetime can reach 2-5 years.
3. High safety and reliability
There are no rolling bearings and bolts in grinding chamber, so problems caused by bolts shedding or wear of bearings and seal components will never happen.
4. High fineness of products
The product fineness can reach D97≤5 micron.
5. Pro-environment
The application of pulse bag filter and muffler reduce the pollution and noise of the dust, which has reached national environment protection standard.
Production Line Configuration
The whole set HGM Micro Powder Grinding Mill consists of (see sketch 1) hammer crusher, bucket elevator, storage hopper, vibrating feeder, main unit, inverter classifier, cyclone, pulse bag filter system, high pressure positive blower, air compressor and electrical control systems.


Model HGM80 HGM90 HGM100-2 HGM100-3
Roller quantity(pcs) 21 24 27 36
Ring quantity(pcs) 3 3 3 4
Main unit speed (r/min) 230 200 180
Max feeding size (mm) <20
Output size (micron) 5-47
Capacity (t/h) 0.4-4.5 0.4-5.5 0.6-6.5 0.7-7.5
Motor power(KW) 145 192 263
Overall dimension (mm) 13900x4000x6200 14700x4800x7200 18000x4600x8600

Note: The production is based on open-circuit condition when bulk density of feeding is 1.6t/ m3. It is also relative to physics character,type of feeding, input size and composition etc. Sandmine machinery reserves all rights to change data without notice.

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