华北某低品位铜钼矿石选矿试验

为解决华北某低品位斑岩型铜钼矿石的高效、低成本开发利用问题,在查明了矿石中主要有用矿物为黄铜矿、斑铜矿和辉钼矿,原生硫化铜+次生硫化铜占总铜的97.10%,硫化钼占总钼的96.02%后,以钼矿物浮选新型捕收剂为研究核心,对该矿石进行了铜钼混合浮选试验。结果表明,该矿石适宜的磨矿细度为-0.074 mm占65%,铜钼混浮粗选捕收剂Mo+MC用量为12+3 g/t,矿浆调整剂石灰用量为1 500 g/t,起泡剂2#油用量为25 g/t,采用1粗3精3扫、中矿顺序返回的闭路流程处理该矿石,可获得铜、钼品位分别为23.72%、1.044%,铜、钼回收率分别为87.22%、74.39%的铜钼混合精矿。

Beneficiation Tests on a Low Grade Copper-molybdenum Ore from North China

With the purpose of high efficiently developing and utilizing a low grade porphyry copper-molybdenum ore from North China at a low cost，copper and molybdenum bulk flotation tests were carried out with the new molybdenum minerals flotation collector as the subject，after finding that the main valuable minerals are chalcopyrite，bornite and molybdenite，native copper sulfide and secondary copper sulfide accounted for 97.10% of the total copper，molybdenum sulfide accounted for 96.02% of the total molybdenum.The results showed that copper-molybdenum mixed concentrate with copper and molybdenum grade of 23.72% and 1.044%，and copper and molybdenum recovery of 87.22% and 74.39% respectively can achieved at the reasonable grinding fineness of 65% -0.074 mm，Mo+MC dosage of 12+3 g/t，lime dosage of 1 500 g/t，2# oil dosage of 25 g/t through closed-circuit process of one roughing，three cleaning，three scavenging and middles back to the flow-sheet in turn.