Xi'an University of Architecture and Technology, Xi'an, Shaanxi, People's Republic of China.
Environ Technol. 2022 Jan;43(1):107-115. doi: 10.1080/09593330.2020.1779354. Epub 2020 Jun 23.
Through the flotation test of pure molybdenite and analyses of surface tension, XPS spectrum, zeta potential and contact angle, the influence of magnetized water on the flotation efficiency of pure molybdenite and its mechanism was investigated. The results showed that the recovery of coarse fraction was much higher than that of fine fraction, the magnetized water could significantly decrease the optimum dosages of collector and frother, simultaneously improve the recovery of molybdenite flotation, and the increase of fine fraction was obviously more than that of coarse fraction. The magnetization had little effect on the surface tension and dissolved oxygen of water, but obviously decreased the conductivity of water and pulp, which was beneficial to restrain molybdenite edge oxidation in water. The XPS test showed that the oxidation degree of molybdenite in magnetized water was obviously lower than that in unmagnetized water, which illustrated that the magnetized water could keep the natural floatability of molybdenite. The absolute value of the zeta potential and the contact angle of the molybdenite were increased after the treatment of magnetized water, which further verified that the magnetized water could help to inhibit molybdenite edge oxidation in water and improve the flotation efficiency of molybdenite.
通过纯辉钼矿浮选试验和表面张力、XPS 光谱、动电位及接触角分析，研究了磁化水对纯辉钼矿浮选效果的影响及其作用机理。结果表明，磁化水对粗粒部分回收率的提高明显高于细粒部分，可显著降低捕收剂和起泡剂的最佳用量，同时提高辉钼矿的浮选回收率，且细粒部分的提高幅度明显大于粗粒部分；磁化对水的表面张力和溶解氧影响不大，但明显降低了水和矿浆的电导率，有利于抑制辉钼矿在水中的边氧化；XPS 测试表明，磁化水中辉钼矿的氧化程度明显低于未磁化水，说明磁化水可以保持辉钼矿的天然可浮性；磁化水作用后辉钼矿的动电位及接触角绝对值增大，进一步验证了磁化水可以抑制辉钼矿在水中的边氧化，提高辉钼矿的浮选效果。
