Two-stage granulation in Diagonal-Design®

Rotor screen granulators are commonly used as a crushing unit in the chemical, food and pharmaceutical industry for sizing of soft to medium hard products.

Conventional designs consist mainly of a rotor with angled granulating bars, which run in a U-shaped frame and push the product through a supported screen mesh or perforated plate. The rotor pushes the lumpy product against the screen mesh, so that the final product is smaller than the perforation of Screen being used.

Traditional process
New process

In comparison, Alexanderwerk has developed a patented granulator in Diagonal-Design®, that raises the capacity up to 100 % by increasing the effectiveness of the working area of the screen. This leads to a doubling of throughput and in turn to a very gentle granulation with minimal fines generation. Additionally investment costs are reduced and the quality of the final product is increased.