宁南难选氧化硫化混合铅锌矿选矿工艺研究

针对宁南难选氧化硫化混合铅锌矿的特点，确定了先浮选硫化矿物后浮选氧化矿物的优先浮选全浮选工艺流程，在条件试验的基础上进行了小型闭路试验，可获得铅品位73.01%、铅回收率64.73%的硫化铅精矿；锌品位43.54%、锌回收率29.88%的硫化锌精矿；铅品位51.44%、铅回收率30.77%的氧化铅精矿；锌品位26.88%、锌回收率37.32%的氧化锌精矿，其中氧化锌矿物采用预先脱泥及中矿再脱泥的浮选工艺可以改善氧化锌选别效果，使流程更加通畅。 

Research on Beneficiation Process for a Refractory Oxidation-sulfidation Lead-zinc Bulk Ore in Ningnan

Based on the properties of the refractory oxidation-sulfidation lead-zinc bulk ore in Ningnan, the preferred and full flotation process of flotation of oxide minerals after that of sulfide minerals was determined. The small closed-circuit test was carried on the basis of the condition test. Finally, the lead sulfide concentrate with the Pb grade of 73.01% and recovery of 64.73%, the zinc sulfide concentrate with the zinc grade of 43.54% and recovery of 29.88%, the lead oxide concentrate with the lead grade of 51.44% and recovery of 30.77% and the zinc oxide concentrate with the zinc grade of 26.88% and recovery of 37.32% were obtained. The flotation process of preliminary desliming and middling further desliming was adopted for zinc oxide ores, which can improve the flotation performance of zinc oxide ores and make the flotation flowsheet more unobstructed.