Netzsch has released its new PROPHI pre-grinding unit, which grinds coarse feed material that is difficult to handle in a normal 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 up to 25 m³/h may be achieved with this machine size. The diameter of the grinding media used usually ranges from 2.0 –4.0 mm.
During เพรสเชอร์เกจ4นิ้ว of the pre-grinding unit, a disc agitator was selected because the identical internet energy enter yields virtually double the grinding chamber volume than when utilizing a pin agitator. This gives significantly more grinding physique contacts and a larger cooling surface for grinding.
With a pre-grinding unit, the particle dimension distribution of a product can be adjusted in order that very small grinding media can be utilized in the subsequent fine-grinding stage. Tests have shown that course of control with the Netzsch PROPHI pre-grinding unit can cut back the specific vitality requirement by greater than 50% as compared with using basic pre-dispersion systems.
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