Netzsch has launched its new PROPHI pre-grinding unit, which grinds coarse feed material that is difficult to deal with 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 sometimes ranges from – mm.
During improvement of the pre-grinding unit, a disc agitator was chosen as a result of the identical net power input yields almost double the grinding chamber volume than when using a pin agitator. This gives considerably extra grinding physique contacts and a bigger cooling surface for grinding.
With a pre-grinding unit, the particle size distribution of a product can be adjusted in order that very small grinding media can be used in the subsequent fine-grinding stage. เกจแรงดันสูง have proven that course of management with the Netzsch PROPHI pre-grinding unit can reduce the precise vitality requirement by greater than 50% as in contrast with using basic pre-dispersion methods.