Ultra-fine Grinding and Ultra-fine Classifying on a Laboratory Scale
NETZSCH Trockenmahltechnik GmbH, one of the global leading companies in the area of dry product processing, is part of the Business Unit Grinding & Dispersing of the NETZSCH Group. Customers profit from our comprehensive experience potential and our diverse machine program, ranging from laboratory- and production machines to complete production lines. Fine impact mills, classifying- and jet mills as well as fine-cutting mills and high-efficiency fine classifiers made by NETZSCH are mainly used in the application areas chemistry, inorganic materials/minerals, ceramics and life science for pharma- and food applications.
Using the spiral air classifier as a model, the infernal processes in a classifier rotor with vanes are discussed and test results compared. The test data was obtained from rotors with an external diameter of 260 mm and 360 mm. Fine materials were produced with d97 of approximately 2.5 µm. The comparison illustrates that results achieved in practice can be interpreted from the described model. The new classifier rotors are already in use in air classifiers and classifier mills; the Superfine Classifier CFS and the Fluidized Bed Opposed Jet Mill CGS are presented.