Netzsch has released its new PROPHI pre-grinding unit, which grinds coarse feed materials that is difficult to deal with in a normal mill.
The PROPHI 20 is a disc agitator bead mill modified for coarse grinding with high throughput and a grinding chamber volume of approx. 20 litres. In the peripheral speed vary of 8–12 m/s, a product throughput of up to 25 m³/h may be achieved with this machine size. The diameter of the grinding media used sometimes ranges from 2.0 –4.0 mm.
During development of the pre-grinding unit, a disc agitator was chosen because the same internet power enter yields nearly double the grinding chamber quantity than when using a pin agitator. This offers significantly extra grinding body contacts and a bigger cooling floor for grinding.
With a pre-grinding unit, the particle dimension distribution of a product could be adjusted so that very small grinding media can be used within the subsequent fine-grinding stage. xp2i have proven that process management with the Netzsch PROPHI pre-grinding unit can reduce the particular energy requirement by greater than 50% as compared with using traditional pre-dispersion methods.
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