Abstract: The effect of nonionic-like amphiphilic triblock copolymers F-127 on the fine quartz and fluorite flotation rate in sodium oleate flotation system was systematically investigated by the single fluorite and quartz and mixture flotation test, Zeta potential analysis, infrared spectrum analysis and sodium oleate absorption test. The results indicated that the sodium oleate has good collecting effect on fluorite and no collecting effect on quartz; F-127 has certain foaming function，therefore, the floatation of pure fluorite minerals can be greatly accelerated； A hetero-coagulation is generated in fine quartz and coarse fluorite, F-127 can improve the dispersion of fluorite-quartz ore and it can promote desorption of fine quartz from the surface of coarse fluorite. Thus, the flotation separation of fluorite and fine quartz can be improved.

Key words: Fluorite, Quartz, Flotation rate, Hetero-coagulation, Nonionic-like amphiphilic triblock copolymers