某含石墨低品位斑岩型铜钼矿石选矿试验

Beneficiation Test of a Low Grade Porphyry Copper-molybdenum Ore Containing Graphite

某含铜0.37%、含钼0.0096%,硫化铜占总铜的89.19%、硫化钼占总钼的85.42%的低品位斑岩型铜钼矿石,其可供综合回收或伴生回收的元素有金、铼等贵金属和铁,矿石中含有的少量片状石墨将影响钼矿物的浮选效果。为确定该矿石的选矿工艺,进行了选矿试验。结果表明,矿石经1粗3精铜钼等可浮、1粗4精1扫铜钼分离、1粗3精2扫强化浮铜、1粗1精1扫弱磁选选铁、中矿顺序返回流程处理,可获得钼品位36.33%、含铜1.69%、钼回收率68.12%的钼精矿,铜品位19.24%、含金2.42 g/t、含钼0.095%、铜回收率84.94%的铜精矿,铁品位66.19%、铁回收率50.87%的铁精矿。浮选钼精矿经重选脱碳,获得了钼品位49.03%、钼综合回收率为58.35%、含铼618.46 g/t、铼综合回收率为27.22%的钼精矿。

A low grade porphyry copper molybdenum ore containing 0. 37% copper,0. 0096% molybdenum,and copper sulfide accounted for 89. 19% of total copper,and molybdenum sulfide accounted for 85. 42% of total molybdenum. Beyond that,associated iron and precious metals such as gold and rhenium could be recovered. A small amount of flake graphite in the ore would affect flotation of molybdenum. To determine the beneficiation technology of the ore,dressing experiment was carried out. The results show that molybdenum concentrate of floatation containing 36. 33% Mo,1. 69% Cu,molybdenum recovery of 68. 12%,and copper concentrate containing 19. 24% Cu,2. 42 g/t gold,0. 095% Mo,copper recovery of 84. 94%,and iron concentrate containing 66. 19% Fe,iron recovery of 50. 87%,could be obtained by the flowsheet of iso-flotation of molybde-num and copper with one roughing-three cleaning,Cu-Mo separation with one roughing-four cleaning-one scavenging,strengthe-ning floatation of copper with one roughing-three cleaning-two scavenging,low intensity magnetic separation with one roughing-one cleaning-one scavenging. Purification of molybdenum concentrate of floatation by gravity separation,molybdenum concen-trate containing 49. 03% Mo,618. 46 g/t Re,molybdenum recovery of 58. 35%,rhenium recovery of 27. 22% could be ob-tained.