青海某含钼铅矿石选矿试验

青海某含钼铅矿石主要为长石-石英脉型、石英脉型、方解石-石英脉及硅化片麻岩型铅钼混合矿石。矿石铅、钼品位分别为3.60%和0.041%,铅、钼氧化程度较低,主要铅钼矿物为方铅矿和辉钼矿,铅、钼矿物是本次试验的主要回收对象。为了绿色、高效回收矿石中的铅、钼,对矿石进行了选矿试验。结果表明,矿石在磨矿细度为-0.074 mm占70%的情况下,以乙硫氮+柴油为捕收剂,1粗2精1扫混合浮选铅钼,铅钼混合精矿再磨至-0.037 mm占80%的情况下,以硫化钠+磷诺克斯为铅抑制剂,1粗3精1扫抑铅浮钼,最终获得了铅品位为70.30%、铅回收率为86.98%的铅精矿和钼品位为45.68%、钼回收率为84.67%的钼精矿。

Mineral Processing Test for Molybdenum-bearing Lead Ore in Qinghai Province

The molybdenum-bearing lead ore in Qinghai is mainly composed of feldspar-quartz vein type，quartz vein type， calcite-quartz vein and silicified gneiss type lead-molybdenum mixed ore.The grade of lead and molybdenum are respectively 3.60% and 0.041%，with low oxidation degree.The main lead-molybdenum minerals are galena and molybdenite.Lead and molybdenum are the main recovery objects.For the green and efficient recovery of lead and molybdenum in ore，ore beneficiation experiment was conducted.Test research showed that with the grinding fineness of -0.074 mm accounted for 70%，diethyldithiocarbamate and kerosene as collector，the mixed flotation process of one-stage roughing,one-stage cleaning,and one-stage scavenging was used to concentrate lead and molybdenum.As lead-molybdenum concentrate was reground to -0.037 mm accounted for 80%，with sodium sulfide and P-Nokes as lead inhibitors，lead concentrates with lead content of 70.30% and lead recovery of 86.98%,and molybdenum concentrates with molybdenum grade of 45.68% and molybdenum recovery of 84.67% were obtained separately by lead inhibiting and molybdenum floating process of one-stage roughing，three-stage cleaning，and one-stage scavenging.