In the milling vessel, the grinding medium is kept moving by the agitator, which itself is driven by a motor. The dispersion process takes place between the grinding beads sliding on each other and between the rotor and/or the vessel sides and the grinding beads.
To guarantee an energy optimized grinding process, at the parameter settings given in Table 2, the mass throughput was pushed to the limit until one stability criterion was violated. Three respective four mill products of varying fineness per mill and material were used for benchmarking. The fineness was defined by the classifier speed.