Netzsch offers pre-grinding unit

Netzsch has released its new PROPHI pre-grinding unit, which grinds coarse feed material that is difficult to deal with in a normal mill.
Never again 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 speed vary of 8–12 m/s, a product throughput of up to 25 m³/h may be achieved with this machine dimension. The diameter of the grinding media used sometimes ranges from –4.0 mm.
During development of the pre-grinding unit, a disc agitator was chosen because the identical internet energy enter yields nearly double the grinding chamber volume than when utilizing a pin agitator. This offers considerably extra grinding physique contacts and a bigger 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 in the subsequent fine-grinding stage. Tests have shown that course of control with the Netzsch PROPHI pre-grinding unit can scale back the precise energy requirement by more than 50% as compared with using traditional pre-dispersion techniques.

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