芳香烃与磷化物协同分选低品位铜钼矿

Separation of Low-grade Copper-molybdenum Ore by the Synergistic Effect of Aromatic Hydrocarbons and Phosphide

针对内蒙古某大型低品位铜钼矿存在品位低、嵌布粒度细、铜钼矿石难选、金属量流失严重等问题,提出采用特殊的高沸点芳香烃与含磷化物协同作用提高低品位铜钼矿精矿回收率。利用激光粒度分析、XRD测定了低品位铜钼矿的矿物特点;利用气质联用技术和IR技术分析捕收剂结构和药剂在硫化矿表面的吸附特征,对原矿铜品位为0.241%、钼品位为0.0362%的低品位铜钼矿进行一粗三精三扫浮选试验,得到混合粗精矿铜品位为17.24%、钼品位为2.44%,铜回收率从88.35%提高到91.57%,钼回收率从75.79%提高到86.28%。试验证明芳香烃与含磷化物的协同作用在黄铁矿存在下对铜钼具有高选择性,为低品位铜钼矿浮选提供了参考。

A large low-grade copper-molybdenum ore in Inner Mongolia has some problems, such as fine embedded particle size, difficult separation of copper-molybdenum ore and serious metal loss. Aiming at the problems, the synergistic effect of the special aromatic hydrocarbons with high boiling point and the phosphide was used to improve the concentrate recovery of low-grade copper-molybdenum ore. Laser particle size analysis and XRD were used to determine the mineral characteristics of low-grade copper-molybdenum ore. The structure of the collector was analyzed by GC-MS and IR, as well as the adsorption characteristics of the collector on the surface of sulfide ore. The flotation test of one coarsing, three fining and three sweeping for low-grade copper-molybdenum ore with copper grade of 0.241% and molybdenum grade of 0.0362% was carried out. The mixed coarse concentrate was obtained with copper grade of 17.24% and molybdenum grade of 2.44%, copper recovery rate increases from 88.35% to 91.57%, and molybdenum recovery rate increases from 75.79% to 86.28%. The test shows that the synergistic effect of aromatic hydrocarbons and phosphides has a high selectivity for copper and molybdenum in the presence of pyrite, which provides a reference for the flotation of low-grade molybdenum ore.