Netzsch has released its new PROPHI pre-grinding unit, which grinds coarse feed materials that’s troublesome to handle in a standard mill.
The PROPHI 20 is a disc agitator bead mill modified for coarse grinding with excessive throughput and a grinding chamber volume of approx. 20 litres. In the peripheral velocity range of 8–12 m/s, a product throughput of as much as 25 m³/h can be achieved with this machine size. The diameter of the grinding media used usually ranges from 2.zero –4.zero mm.
During growth of the pre-grinding unit, a disc agitator was chosen as a result of the same internet energy enter yields virtually double the grinding chamber volume than when using a pin agitator. Savings 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 can be adjusted so that very small grinding media can be used within the subsequent fine-grinding stage. Tests have shown that process control with the Netzsch PROPHI pre-grinding unit can scale back the specific power requirement by more than 50% as compared with utilizing traditional pre-dispersion techniques.
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