Netzsch presents pre-grinding unit

Netzsch has launched its new PROPHI pre-grinding unit, which grinds coarse feed materials that’s troublesome to handle in a regular mill.
The PROPHI 20 is a disc agitator bead mill modified for coarse grinding with high throughput and a grinding chamber quantity of approx. 20 litres. In the peripheral velocity range of 8–12 m/s, a product throughput of as a lot as 25 m³/h could be achieved with this machine size. The diameter of the grinding media used sometimes ranges from 2.0 – mm.
During growth of the pre-grinding unit, a disc agitator was selected as a result of the same net power enter yields virtually double the grinding chamber quantity than when using a pin agitator. Steal gives significantly more grinding body contacts and a larger cooling floor for grinding.
With a pre-grinding unit, the particle size distribution of a product could be adjusted so that very small grinding media can be used in the subsequent fine-grinding stage. Tests have shown that process management with the Netzsch PROPHI pre-grinding unit can scale back the specific power requirement by greater than 50% as in contrast with using traditional pre-dispersion techniques.

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