Netzsch offers pre-grinding unit

Netzsch has launched its new PROPHI pre-grinding unit, which grinds coarse feed material that is troublesome to deal with in a regular 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 could be achieved with this machine dimension. The diameter of the grinding media used typically ranges from 2.zero –4.zero mm.
During improvement of the pre-grinding unit, a disc agitator was selected because the same net energy input yields virtually double the grinding chamber quantity than when using a pin agitator. This provides considerably extra grinding body contacts and a bigger cooling surface for grinding.
With a pre-grinding unit, the particle dimension distribution of a product may be adjusted so that very small grinding media can be used in the subsequent fine-grinding stage. เกจ์วัดแรงดันน้ำ have shown that process control with the Netzsch PROPHI pre-grinding unit can reduce the precise vitality requirement by more than 50% as in contrast with using classic pre-dispersion techniques.
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