Abstract: In order to understand the effect of magnetization treatment on the flotation behavior of fluorite in sodium oleate system， flotation tests of fluorite pure mineral were carried out in the case of magnetized sodium oleate， magnetized flotation water or magnetized pulp. Amount of sodium oleate adsorbed on the surface of fluorite and zeta potential were studied. The results showed that: ①In the condition of pH=8， the concentration of sodium oleate 1.07×10-4 mol/L and the magnetic field intensity 200 mT， the recovery rate of pure mineral flotation tests were 94.48%， 93.07% and 91.48%， when the magnetization time of sodium oleate was 10 min， the magnetization time of flotation water and pulp were 30 min， respectively. The recovery rate of pure mineral flotation tests were 94.48%， 93.07%， and 91.48%， respectively. Compared with unmagnetized conditions， the recovery rate increased by 7.60， 6.19 and 4.60 percentage points， respectively. At the same time， the magnetization treatment can effectively reduce the usage amount of sodium oleate， accelerate the flotation rate of fluorite and reduce the cost of separation. ②All magnetized sodium oleate， water and pulp can increase the amount of sodium oleate adsorbed on the surface of fluorite. The increasing adsorption amount of magnetized sodium oleate is the most significant， followed by magnetized water. All magnetization treatment can negatively shift the zeta potential of the fluorite surface， indicating that the magnetization treatment promotes the adsorption of oleate ions on the surface of the fluorite. ③In artificial mixed mineral flotation tests， magnetization promoted the fluorite flotation. In the conditions of no magnetization， magnetized pulp， magnetized water and sodium oleate， the fluorite concentrate grade were 94.57%， 94.70%， 94.75% and 95.94%， respectively， the fluorite recovery rates were 86.60%， 89.89%， 93.01% and 95.35%， respectively. The recovery rates of fluorite using magnetized pulp， magnetized water and sodium oleate were increased by 3.29， 6.41 and 8.75 percentage points， respectively， compared to unmagnetized conditions.

Key words: Fluorite flotation, Magnetized treatment, Adsorption capacity, Zeta potential