Feedback

Grinding Media Motion and Collisions in Different Zones of Stirred Media Mills

Affiliation
Institute for Particle Technology
Fragnière, Greta;
Affiliation
Institute for Particle Technology
Naumann, Aleksandra;
GND
1218631902
Affiliation
Institute for Particle Technology
Schrader, Marcel;
ORCID
0000-0002-6348-7309
Affiliation
Institute for Particle Technology
Kwade, Arno;
GND
1034860399
Affiliation
Institute for Particle Technology
Schilde, Carsten

Product fineness during grinding in stirred media mills is mainly influenced by the specific energy input, the stress energy transferred by the colliding grinding media and the stress frequency. The stress energy from grinding media collisions is heterogeneously distributed in stirred media mills. Herein, in order to characterize the stress energy distribution and the local grinding media collision frequencies, the grinding media motion was calculated using discrete element method (DEM) simulations coupled with computational fluid dynamics (CFD). The local grinding media concentration, velocity profiles, grinding media collisions and stress energies were compared for varied total grinding media fillings and stirrer speeds. It was confirmed that the normalized grinding media velocity profile can be used to divide the grinding chamber into four types of zones that allow the modeling of the stress energy distribution. However, the collision frequency showed very different distributions for varied stirrer velocities and grinding media fillings.

Cite

Citation style:
Could not load citation form.

Access Statistic

Total:
Downloads:
Abtractviews:
Last 12 Month:
Downloads:
Abtractviews:

Rights

Use and reproduction:

Export