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Fine powders can be processed into densified sheets in the Chilsonator by
the use of mechanical pressure exerted on two compacting rolls. The densified
sheets can then be granulated to any desired mesh size.
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To produce uniform blends or mixtures.
Mixtures of various particles tend to segregate in transport or handling
because of differences in particle size, shape and density. The Chilsonator
can produce granules of uniform consistency, which eliminates segregation
and facilitates consistent analysis. |
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To produce uniform particle size range.
The particle size range of the product can be selected to suit individual
requirements and varied according to process needs. |
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To control dust. Dust/Powder is generally
difficult to handle and may pose problems with respect to exposure.
Cross contamination and product loss can be eliminated. |
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To adjust flow properties. Granular materials
flow more easily and resist bridging and caking. Higher flow rates
and more even fill can be achieved in many cases. |
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To control bulk density. Increased bulk
density may be desirable for storage, transport or packaging. Marked
increases in bulk density can usually be achieved and controlled within
certain limits. |
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To control particle hardness. The characteristics
of particle hardness can sometimes be adjusted to suit the product
needs. Crush strength and disintegration can be important properties
brought under more rigid control. |
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To improve solution or dispersion rates.
Granular materials absorb liquids more readily than do many powders.
Therefore, granular materials will dissolve or disperse more easily
and quickly. |
The basic concept of compaction (seen in
the illustration). Is to force fine powders between two counter rotating
rolls. As the volume decreases through the region of maximum pressure,
the material is formed into a solid compact or sheet.
Some of the factors controlling the compaction process are roll surface,
diameter, peripheral speed, separating force or pressure capabilities,
feed screw design and basic compaction characteristics of material being
processed.
In most applications, the product compacted by the Chilsonator must be
granulated to a uniform particle size distribution. This can be most efficiently
achieved with a FitzMill granulator which is designed with maximum flexibility
enabling control of the size reduction of the compact with predictable
and repeatable results.
Recycle System - In order to eliminate essentially all fines and overs
it is possible to design the dry granulation system to include a screener
and recycle system. This provides tremendous control of the final particle
size and density.
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