Abstract: Following a general study of 3 flotation sub-processes,i.e.particle-bubble collision,particlebubble attachment and particle-bubble detachment,the paper presents an overview of the technologies available worldwide for intensification of hard-to-float fine coal flotation process based on hydrodynamics and interfacial conditioning aspects.In view of the limitations of the effect produced by enhancement of a single process,an innovative idea of making hydrodynamics-interfacial conditioning synergistic enhancement is proposed,for effecting fine coal flotation process intensification.