Dry Agglomeration

Dry agglomeration is widespread in powder technology. Fine particles have the property of adhering to other particles. This tendency to adhere increases as particle size decreases. Without this tendency to agglomerate, dust filters would not function efficiently. The particles form clusters and can thus be separated.

Dry agglomeration also occurs sporadically with carbon black and color pigments. This process is referred to as dry pearling. Granular structures are formed without the need to add liquid binders.

Ring-layer mixing granulators can dry-agglomerate such products. Agglomeration occurs through shearing, pressure, collisions, and adhesion between the particles. Dry agglomeration is rather a rare stroke of luck. In this case, subsequent thermal drying can be omitted.