Typical toner products have a D50 in the range of 5 µm – 7 µm. NETZSCH Trockenmahltechnik GmbH entered the field of toner processing with the development of the CGS Jet Mill in the 1990’s followed by the CFS/HD-S High Dispersion Air Classifier a few years later.
The ConJet® High Density Bed Jet Mill combines a spiral jet mill with a patented dynamic air classifier enables you to achieve high degrees of fineness, independent of the load on the gas flow.
A new jet mill combines a spiral design with a patented dynamic air classifier wheel to achieve optimum levels of fineness and throughput.
The high-density bed jet mill represents an advanced development of the spiral jet mill. Its core feature is the integration of a dynamic air classifier at the centre of the grinding chamber. This enables optimal independent setting of the grinding fineness and efficiency. In addition, the circular motion of the material ground in the grinding chamber and the air classifier restricting product discharge from the grinding zone result in a very intensive loading of the gas jets with the material to be ground. This leads to a considerable improvement in the mill efficiency, especially for the grinding of lightweight materials. The operating characteristics of high-density bed jet mills and fluidized bed jet mills are compared and finally, on the basis of this comparison, favourable applications for the new high-density bed jet mill are derived.