Netzsch has released its new PROPHI pre-grinding unit, which grinds coarse feed materials that is troublesome to deal with 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 as much as 25 m³/h could be achieved with this machine dimension. Eye-opening of the grinding media used sometimes ranges from 2.0 –4.0 mm.
During growth of the pre-grinding unit, a disc agitator was selected as a end result of the identical net power input yields virtually double the grinding chamber quantity than when using a pin agitator. This provides considerably more grinding body contacts and a bigger cooling floor 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 used in the subsequent fine-grinding stage. Tests have proven that course of management with the Netzsch PROPHI pre-grinding unit can cut back the particular energy requirement by more than 50% as compared with utilizing classic pre-dispersion methods.
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