Netzsch has launched its new PROPHI pre-grinding unit, which grinds coarse feed materials that is difficult to handle in a regular 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 speed vary 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 2.0 – mm.
During development of the pre-grinding unit, a disc agitator was chosen as a outcome of the same net energy input yields almost double the grinding chamber volume than when utilizing a pin agitator. This offers significantly extra grinding physique contacts and a bigger cooling surface for grinding.
With a pre-grinding unit, the particle dimension distribution of a product may be adjusted so that very small grinding media can be used within the subsequent fine-grinding stage. diaphragm seal have proven that course of control with the Netzsch PROPHI pre-grinding unit can cut back the specific energy requirement by greater than 50% as compared with using classic pre-dispersion methods.