Abstract:In the system of sodium oleate, we studied the flotation properties of dolomite, kaolin, quartz, and inspected the effects of pH, the dosage of sodium oleate, concentration of different metal ions. And the effect of the pH and metal ions has been explained according to the test results of Zeta potential. Results show that the dolomite has good flotation characteristics in system of sodium oleate and conditions have no significant influence on its flotability. Flotability of quartz is poor, but the floatability could be improved more than 90.0% by adding Ca2 , Mg2 , Al3 and adjusting the pH. In system of sodium oleate, Kaolin’s recovery rate can reach 80.0%. When Ca2 , Mg2 , Al3 are added in strong acid or alkali system, Kaolin almost has no flotability.