Netzsch offers pre-grinding unit

Netzsch has released its new PROPHI pre-grinding unit, which grinds coarse feed material that’s tough to handle in a standard 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 up to 25 m³/h could be achieved with this machine size. The diameter of the grinding media used sometimes ranges from – mm.
During Bonus of the pre-grinding unit, a disc agitator was selected as a outcome of the same web power input yields virtually double the grinding chamber volume than when utilizing a pin agitator. This offers considerably extra grinding body contacts and a larger cooling surface for grinding.
With a pre-grinding unit, the particle dimension distribution of a product can be adjusted so that very small grinding media can be utilized in the subsequent fine-grinding stage. Tests have shown that course of management with the Netzsch PROPHI pre-grinding unit can scale back the precise power requirement by greater than 50% as in contrast with using classic pre-dispersion methods.

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