Because compaction is a dry process, usually not requiring binder, drying is often not needed. However, drying can be added to the process set-up to improve resistance to attrition, or the breakdown of granule edges. The granules created during the compaction process can be wetted and dried, which fills in any surface cracks and dissolves loose edges. Again, when carried out in a rotary dryer, this process breaks off loose edges and further polishes the granules.
For materials that do not use a binder during compaction, and therefore do not need a drying stage, a dryer can be added to help reduce the moisture down to the ideal level required to produce the final agglomerate.
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