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The possibility to use complexing reagents-collectors in floating different rare-earth and rare-metal ore has been studied. A prognostic assessment has been performed of efficiency of organic heteropolar compounds as flotation reagents-collectors on the basis of moleculeпїЅs energy parameters. The interaction has been considered of rare-earth and rare-metal minerals such as eudialite, zirconium, loparite and columbite with complexing reagents. Gain in energy (??) has been calculated by computer modeling at formati...