Investigating the Grinding Media Behavior in Dry-Stirred Mills for fine grinding applications

Dry-operated stirred mills hold promise for energy-efficient dry fine-grinding operations. However, the motion of the grinding bead within this mill type is still not well understood. So, the Institute for Particle Technology (iPAT) at Technische Universität Braunschweig recently used Rocky DEM simulation tools to investigate bead contact requency, collision energy and computed power draw of the mill. The results correlated well with experimental findings and provided insight that industry can leverage to expand the use of dry-operated stirred milling.

Dry-operated stirred media mills offer great promise for energy-efficient comminution with resulting micron-sized particles. Rocky DEM enables us to accurately study the simulation of complex stirrer geometries. In addition, the software offers advantages in terms of computing time and resources, since GPUs can be applied.

Paul Prziwara [M.Sc.] & Christoph Thon [M.Sc.]

Institute for Particle Technology

Dry-operated stirred mills hold promise for energy-efficient production of ultrafine materials. However, not much is understood about the motion of grinding beads during the comminution process.

Apply discrete element modeling to identify the impacts of process and product parameters on bead motion.

DEM simulation — which investigated bead contact frequency, collision energy and computed power draw of the mill — correlated well with experimental findings. The results provide insight that the industry can leverage to expand the use of dry-operated stirred milling.


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