Fluid-particle energy transfer in spiral jet milling
1 School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
2 AstraZeneca, Macclesfield SK10 2NA, UK
3 Hosokawa Micron, Runcorn, WA7 3DS UK
* Corresponding author: M.Ghadiri@leeds.ac.uk
+ Current address: Department of Chemical and Process Engineering, University of Surrey, Guildford GU2 7XH, UK
Published online: 30 June 2017
Spiral jet milling is a size reduction process driven by the fluid energy of high velocity gas jets. Inter-particle and particle-wall interactions are responsible for size reduction. The process is energy intensive, but inefficient. The underlying mechanisms for size reduction in the mill are also not very well understood. The optimum grinding conditions are still currently found by trial and error experimentation.
In this work, the Discrete Element Method coupled with Computational Fluid Dynamics is used to investigate the effects of different parameters on the particle collisional behaviour in a spiral jet mill. These include the particle concentration in the grinding chamber, the particle size, and the fluid power input. We report on our work analysing the efficiency of energy transfer and how it can be improved by changing the milling conditions and particle properties.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.