Agitator bead mills

Agitator bead mills belong to the class of comminution machines with loose, moving grinding media. The classic representatives of this group are the tumble mills known as ball mills or drum mills. 

While the power consumption of ball mills is limited by the critical speed, the grinding media in agitator mills are set into the relative movement required for comminution by an agitator and thus provided with the necessary energy.

The grinding vessel is usually stationary. The grinding media filling is set in motion with an agitator. The solid to be ground is preferably fed as a suspension. Such an arrangement was first presented in 1928 by Klein and Szegvari in Swiss Patent Specification No. 132086 as Attritor Mills.