不同钙离子沉淀对辉钼矿浮选抑制机理研究OACSTPCD

Molybdenum flotation pulps containing a large amount of Ca2+,which may precipitate on the surface of Molybdenum with such as SO42-,MoO42-,CO32-,OH-,etc.,thereby inhibiting the flotation of Molybdenum to varying degrees.The results of solution chemistry calculations indicated that the occurrence points of CaSO4/CaMoO4/CaCO3/Ca(OH)2/in the slurry were pH=1.8/3.8/6.6/13.6,and there were varying degrees of mutual transformation behaviors.The single mineral flotation test results showed that CaSO4 and CaMoO4 had a relatively small inhibitory effect on the flotation of Molybdenum,while CaCO3 and Ca(OH)2 had a greater inhibitory effect,with CaMoO4 having the smallest impact and Ca(OH)2 having the most adverse effect.The contact angle test results showed that the contact angles on the edges of Molybdenum in deionized water/CaMoO4 solution/CaSO4 solution/CaCO3 solution/Ca(OH)2 solution were 89.25°/80.44°/73.31°/62.56°/53.13°,which was consistent with the influence of different calcium ion precipitation on the flotation efficiency of Molybdenum.The SEM-EDS results showed that only minimal amount of CaMoO4 and a small amount of CaSO4 adsorbed on the edges of Molybdenum,but a large amount of CaCO3 was adsorbed on the faces and edges of Molybdenum.This indicated that the difference in adsorption behavior of different calcium ion precipitates on the surface of Molybdenum might be the reason for the different flotation effects of Molybdenum.Therefore,regulating the type of calcium ion precipitate in the flotation slurry of Molybdenum is beneficial for improving the molybdenum selection effect.