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From Apache Wiki <>
Subject [Httpd Wiki] Update of "vertical roller mill" by sbmzhcn
Date Sun, 11 Jul 2010 07:32:50 GMT
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The "vertical roller mill" page has been changed by sbmzhcn.


New page:
[  Vertical roller mill]
has many different forms, but it works basically the same. All of these forms of machine comes
with roller (or the equivalent of roller grinding parts), and roller along the track of the
disc at the level of circular movement imposed by external grinding roller in the vertical
pressure on the disc on the material being the joint action of compression and shear, and
to crush. 
Material grinding process: motor through reducer rotating drive disc, the material falls from
the mill under the central entrance and exit, under the action of centrifugal force to the
disc edge by the roller to move and the crushing, grinding out lap after the material was
speed up the flow to and vertical mill with one of the separator, after the meal by the separator
back to the mill, the re-grinding; powder while grinding out with air, dust collection equipment
in the system to collect down, that is, products . Established through the mill in the pneumatic
conveying of materials, a larger air flow rate, which can use waste heat of gas, at the same
time dry grinding operations. 

[ Vertical Roller Mill] Principle:
Used in cement grinding production grinding parts of its various forms, there is a cylinder,
cone type, ball type, etc., and roller surface is also flat, curved, convex round noodles.
Applied to the grinding roller to roller grinding along the track bed in close contact with
the material strength of a spring pressure, hydraulic, etc.. 

How Vertical Roller Mill Works:
It has two pairs of grinding rollers, each pair of roller composed of two narrow rollers,
mounted on the same axis and can rotate at different speeds. There are two circular disc slot,
and roller to the tire shape, work pressure in the tank. Disc roller and the relative sliding
velocity between small and roller can swing, even if the roller sleeve and the disc after
the liner wear can guarantee a good abrasive, will not affect the grinding effect. Roller
symmetrical structure, one side can be upside down after use and wear. 
Material grinding process: hydraulic pneumatic roller device through the pressure applied
to the material on the crushing of materials, the materials have been moved to crush the edge
of disc, from the disc around the nozzle from the exhaust air to improve these materials to
Separator.Meal to separate returns after a concentrated mill, fine powder was collected in
the precipitator unloading. In the gas flow is small, the meal can not be increased to enhance
air flow, they would fall through the nozzle discharged outside the mill, bucket elevator
to be transported to the feeder of [  Vertical Roller Mill],
and was re-grinding mill feed people. This cycle features of the way there:
① ring by adjusting the air valve, can change the product fineness can Shide mill bed load
material uniformity and stability, improving the grinding efficiency; 
② coarse particles in the external circulation, helps reduce Fan power consumption and overall
system power.

==External Links==
*[vertical roller mill]

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