August 2017: Associate Professor Runyu Yang, "A combined experimental and DEM approach to determine the breakage of particles in an impact mill"
A virtual mill for investigating particle breakage
Breaking particles in a critical step in mineral processing to liberate valuable ores from gangue, but it is a low energy efficiency process (<10%). Characterisation of single particle breakage is important for improving the process efficiency. This work has developed a virtual mill similar to the commercial Fritsch impact mill based on the discrete element method. The simulations allowed close examination of particle trajectory and impaction with the mill. Based on the combined simulations and experiments, two equations were proposed to determine the breakage probability of particles and the sizes of fragments. The accuracy of the equations was confirmed by predicting the size distribution of ground particles under different mill conditions.
Read the full article, as published in Powder Technology (Volume 318, August 2017, Pages 543-548).