青海某含钼铅矿石选矿试验

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

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。

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 respec- tively 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 benefi- ciation experiment was conducted. Test research showed that with the grinding fineness of -0. 074 mm accounted for 70%, di- ethyldithiocarbamate 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 clean- ing, and one-stage scavenging.