Spiral jet mill
The spiral type Jetmill of PMT-Jetmill is specialized in optimizing air streams to improve efficiencies and to minimize energy consumption for ultra-fine dry grinding.
The integrated dynamic classifier, the so-called Rotor-Motor-Unit is based on its high strength aluminum disks capable to run at a maximum circumferential speed of 190 m/s. This allows products with a fineness in the low micrometer range and depending on the material even below 1 µm.
The fineness can be easily adjusted by variation of the classifier speed.
The specially developed feed control system together with the optimized grinding nozzles lead to high efficiency of the used energy.
In combination with the newly developed EEU System “Enhanced Energy Utilization” we are able to achieve a reduction in energy use of up to 30 % compared to other micronizing systems.
We either use compressed air (3.5 to 15 bar and 240°C) or superheated steam (up to 24 bar and 400°C) as a grinding medium.
With the continuous reject unit unwanted and hard grindable impurities such as Quartz can be removed from the process and enhance the product quality significantly.