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High Shear Mixer |
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Principle of Operation
To create the granules, powders are added to the mixing bowl
and the bowl is sealed. If necessary a dry binder may be added
with the powders or dispersed into the granulating liquid.
A large impeller spins at fairly slow speeds spinning the powders
into a vortex. After the powders are blended together, liquid
is added to the product using a pump or pressurized container.
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A chopper tool located in the bowl spins
at fairly high speeds shearing the granules and removing air.
The mixing continues until the desired end granule size and
density is achieved.
End point is often determined via power consumption or torque
on the main mixing tool drive. The granulated product may
be dried in the mixing bowl, if equipped for vacuum drying,
or discharged for fluid bed drying.
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