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In principle "agglomeration" is a process where two or more single particles adheres to each other - either by coincidence or by force. The agglomeration can be carried out in a one step operation as it is done in the MSD™/ FSD™ plant. The IFD™ (Integrated Filter Dryer) plant, the COMPACT DRYER™ or the TALL FORM DRYER™.
Here the warm moist particles are colliding with each other forming agglomerates. The agglomeration is further enhanced by returning the bagfilter/ cyclone fraction to the wet atomizer cloud.
Agglomeration of a powder consisting of dry single particles can also be done in a rewet agglomeration process, where the surface of the dry particles are moistened and exposed to a mechanical impact then making the particles stick together forming agglomerate.
The two different agglomeration methods can be combined in the FSD-GRANULATOR™ and IFD-GRANULATOR™, where liquids are sprayed onto the powder in the fluidized powder layer in the integrated back mix bed. This together with fines return to the atomizer devise makes it possible to produce agglomerates of bigger size.