Insights into Selection of the Auxiliary Collector and Its Applicability Analysis for Improving Molybdenite Flotation

In this study, two auxiliary collectors (methyl naphthalene and naphthalene) of molybdenite the traditional collector (kerosene) were mixed for flotation, respectively. According to selection analysis collector, it was found that surface energy (γC= 44.50 mJ/m2) polycyclic aromatic hydrocarbons is very close (γS= 42.55 {100} surface. Therefore, can be physically adsorbed onto according principle similar compatibility. Batch flotation conducted on actual ore with compared kerosene alone. results showed at a mass ratio 95:5 main pH 11.0 improved is, Mo recovery increased by 3–4%. The practical application feasibility analyzed filtration speed concentrate crystal resolution characteristics collector. show solid (Nap) easy crystallize low temperature adhere concentrate, resulting in decrease velocity, while liquid methylnaphthalene (MNap) does not temperature. These imply Kerosene/MNap generate superior synergistic effect achieve better collecting capacity than alone, increase 3–4 percentage points. Moreover, addition MNap has little negative impact subsequent treatment product.