Sep 23, 2019· The Contrarian's Guide to SAG Mill Optimisation, Sherman. 9. ... Asset Health Analytics of a Gearless Mill Drive, Tischler. 52. ... An Assessment of the Energy Efficiency and Operability of the World's Largest Autogenous Grinding Mills at Boliden's Aitik Mine, McElroy, Powell, Tillberg, Hilden, Yahyaei, Linna, & Johansson. 66.