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Three-ring medium speed superfine powder grinding mill

Three-ring medium speed superfine powder grinding mill (calcite ultrafine mill, limestone ultrafine mill, calcium carbonate ultrafine mill, talc ultrafine mill, barite ultrafine mill, gypsum ultrafine mill, marble ultrafine mill, feldspar ultrafine mill ) is mainly suitable for pulverizing all kinds of non-inflammable, non-explosive and barittle materials with middle and low hardness (Moh’s hardness under seven), the moisture under 6% such as calcite, chalk, limestone, dolomite, carbon black, kaolin, bentonite, talc, mica, magnesite, illite, barite, feldspar, gypsum, graphite, fluorite, etc., Totally more than 100 kinds of materials. The final fineness of the finished powder products can be adjusted between 325meshs and 3000meshs (47-5micron), and the product fineness can reach D97≤ 5μm.

Three-ring medium speed superfine powder grinding mill mainly consists of main unit, classifier, powder collector, dust cleaner, blower, muffler, sound-proof room, crusher, bucket elevator, storage hopper, and vibrating feeder.

Working principle ofThree-ring medium speed superfine powder grinding mill:

After crushed by hammer crusher, the large materials become small ones and are sent to storage hopper by elevator, edge of then evenly sent to the upper distribution plate of the turnplate by vibrating feeder and sloping feeding pipe.

When the ultrafine grinding mill is at work, all the grinding rollers are rolling in the ring, and the materials are driven to the edge of the turnplate by the centrifugal force and fall down into the grinding chambers where the materials are repeatedly pressed, crushed and grinded by the rollers.

The high-pressure air blower constantly inhales air within the grinding mill and, in turn, the air flow with crushed materials are brought to the classifier whose high-speed impeller will screen the airflow: the unqualified particle size will fall and return to the mill for being reground while the qualified particle size mixed with air will go into the cyclone powder collector. Most of the qualified powders will fall an exit from the discharging valve at the bottom; a small proportion of the fine powders, with airflow, moves to the dust cleaner, and clings to the surface of the filter bags. At the same time, the fine powders clinging to the surface fall down by the sudden vibration of the filter bags, which is caused by the instantly ejected high-pressure gas controlled by the pulse valve. The materials from the above two lots are sent by the conveyor at the bottom to get finished powders packed. In addition, filtered clean air will be emitted from the air outlet of muffler in the end.

Features of Three-ring medium speed superfine powder grinding mill

l High efficiency

Under the same finished final size and the same motor power, the capacity of micro powder grinding mill is twice as much as jet mill, mixing grinder and ball mill.

l Long lifecycle of spare parts

The ring and roller are forged by special material with high utilization. Under the same grinding material and finish special size, the lifecycle of spare parts is about one year, which is 2-3times longer than impact mill or turbo mill. Furthermore, the lifetime can reach 2-5 years for grinding calcite carbonate.

l High safety and reliability

As no rolling bearings or screws in grinding cavity, there are no problems caused by bolts shedding or rapid wear of bearings and seal components.

l High fineness and flexible adjustment

The final fineness of the grinding materials can be adjusted between 325 meshes and 3000 meshes, and the product fineness can reach D97≦5um.

l Environment-friendly

The application of pulse deduster and muffler greatly alleviates dust pollution and noise.

Model and technical data ofThree-ring medium speed superfine powder grinding mill

Model	HGM80	HGM90	HGM100	HGM100A	HGM125
Ring Diameter(mm)	800	930	1035	1035	1300
Ring Number/pcs	3	3-4	3	4	4
Roller Number/pcs	21	24-32	27	34-36	40-44
Main Shaft Speed/r. p. min	230-240	200-220	180-200	180-200	135-155
Input Size/mm	≦20
Finished Size/um	5-47(325-2500)
Capacity t/h	0.5-4.5	0.6-6.5	0.7-7	1-8.5	1.5-12
Outlet Size LWH/m	13.946.2	14.74.87.2	184.68.6	184.68.6	14910.25
Motor powder/KW	145-165	185-204	263	263-290	380-430