Pre-mills fulfill the task of grinding coarse feed material that is difficult to handle in a standard mill. The ProPhi 20 is a disk agitator bead mill modified for coarse grinding with high throughput and has a grinding chamber volume of 20 liters. In the peripheral speed range of 8 - 12 m/s, a product throughput of up to 25 m³/h can be achieved with this machine. The diameter of the grinding media used ranges from 2.0 to 4.0 mm.

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