The results of the Timanskoye and Severo-Onezhskoye deposits' low-grade bauxite ores preliminary dressability studies are presented. The ore particle-size distribution was determined and grinding kinetics were studied. The experiments on non-ball grinding, elutriation, magnetic separation, flotation, including with application of the state-of-the-art specialized flotation reagents, as well as the experiments on combined processing and gravity-magnetic separation were performed.