Bauxite Mining and Alumina ReÞning Process Description and Occupational Health Risks A. Michael Donoghue, MBChB, MMedSc, PhD, Neale Frisch, BSc(Hons), Grad Dip Occ Hyg, COH, ... Wet grinding of the bauxite ore in rod mills, ball mills, or semi- ... bauxite crushing and transport from 1936 to 1962. 17 The incidental