Computational prediction of performance for a full scale Isamill: Part 1 – Media motion and energy utilisation in a dry mill

Computational prediction of performance for a full scale Isamill: Part 2 – Wet models of charge and slurry transport

“…It uses a linear spring-dashpot model, see Thornton et al (2013) for a good summary of the contact models and alternatives for inelastic collisions. An overview of the DEM model for the Isamill is given in Part 1 of this paper (Cleary et al, 2015).…”

“…A single DEM configuration was used to model the grinding media in all the coupled simulations reported here. It used a media-media friction coefficient of 0.4, a media-mill friction of 0.3 and a coefficient of restitution of 0.6 for media-media contacts and 0.5 for media-mill ones (as was used in Cleary et al, 2015). The media fill level was 80% of the grinding chamber.…”

“…A detailed investigation of the media behaviour in the Isamill using DEM was reported in Cleary et al (2015). The mill is rotating with a tip speed of 22 m/s, has a fill level of 80% by volume and is using 9 mm grinding media.…”

“…The resulting data then contains only radial and axial variations with all the azimuthal flow structure eliminated by the averaging. The particle flows around and through the disc holes were shown in Cleary et al (2015) to be complex and critical to mill operation. The earlier fluid solutions also show that the disc holes provide a critical path for axial transport of slurry that enables a large scale axial recirculation to be generated by the classifier.…”

“…This is the second part of a study of the M10000 Isamill with the first part (Cleary et al, 2015) dealing with DEM only predictions of dry operation of the Isamill. Here we use two types of model:…”