The principle of grinding mill equipment

The principle of grinding mill
Grinding mill powder Tech. Shanghai Clirik Machinery Co., Ltdis very gald to announce that, after several seasons delays, it has now received at site its semi-autogenous grinding mill. The grinding mill is currently being assembled and will be implemented into the existing circuit in order to increase thoughput in the mill twofold. During assembly of the grinding mill, processing of the 250 tonne high grade gold-bearing sample blocks will continue utilizing the current set up.

grinding Mill machine (calcite carbonate grinding machine, chalk grinding machine, limestone grinding machine, dolomite grinding machine, kaolin grinding machine, bentonite grinding machine , talc grinding machine, mica grinding machine, magnesite grinding machine, pyrophillite grinding machine, ceyssatite grinding machine, barite grinding machine, gypsum grinding machine, alunite grinding machine, granite grinding machine, fluorite grinding machine, phosphate rock grinding machine, kalium ore grinding machine , float stone grinding machine) is mainly applied to non-inflammable, non-explosive and brittle materials with Mohs hardness under six. Such as calcite (calcite carbonate, calcium carbonate), chalk, limestone, dolomite, kaolin, gypsum, etc, totally more than 100 kinds of materials. Product fineness can be controlled between 0.047 and 0.005mm.  

grinding Mill
 

How does grinding mill work

Observation and research finding indicate that earliest type of grinding mill is called a quern-stone. Two heavy stones which fit together. The top rotates and the corn (etc) is trapped between the two stones. The faces usually have small groves carved into then, and these function a lot like the teeth on a file. The corn gets "stuck", and other side rotates, and files away the free surface of the stuck grain . There's LOTS of different patterns for these groves. Different ones are probably better for different grains.

if the grain are approximately a sphere (but isn't) and isn't perfectly spread over the grinding faces. The upper stone will be supported by thin layer of grain which works a little bit like ball-bearings. But because the grains aren't perfect spheres, when they rotate a few will rotate and try to raise the upper stone, increasing the pressure on the grain to such an extent that the husk is likely to crack. If the upper stone is being turned fairly fast, the pressure gets bigger.

pestle and Morters, and other types of grinding mill (such as Ball mills) largely use pressure/impact to shatter that to be ground into a powder. There's still some rubbing

Working Principle of Clirik Ultrafine  grinding Mill:

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

When the 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 airflow 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 and 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.
 

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