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air lift flotation machines. the application of the air-lift to flotation is not new, but the first attempts to make use of the principle were not successful because the degree of agitation in the machine was insufficient to enable the heavy oils then in use as collecting reagents to function effectively.iron ore reverse flotation introduction - prmall of these make reverse flotation method a frequent application of iron ore separation. the research and development of new type reverse flotation reagents are quite essential for making better reverse flotation method. nowadays, there is a trend that reverse flotation reagents move toward diversification and complex direction. by combing two