某钼矿伴生极低品位铜综合回收试验研究

Experimental Study on Comprehensive Recovery of Extremely Low Grade Copper Associated with Molybdenum in a Molybdenum Ore

某钼矿伴生极低品位硫化铜,铜品位为0.016%,直接回收难度大。硫化铜天然可浮性好,部分硫化铜进入钼精选作业,钼精选作业铜钼分离后钼精扫尾矿中铜可以富集至1.78%,具有一定的经济价值。为高效回收钼精扫尾矿中的铜金属,进行了脱水不脱水对比、石灰用量(pH)、捕收剂种类和用量、再磨细度等关键试验研究。试验结果表明:采用一次粗选—两次扫选—四次精选的脱水工艺流程,当pH调整剂石灰用量为50 g/t,铜捕收剂Z200用量为28 g/t,起泡剂2#油用量为1.3 g/t时,可获得精矿品位为21.49%,作业回收率为79.41%的铜精矿。

A molybdenum ore is associated with a very low-grade copper sulphide with a copper grade of 0.016%,which is difficult to recover directly.Copper sulfide has good natural floatability,and some copper sulfide enters the molybdenum cleaning process.After the separation of copper and molybdenum in the molybdenum cleaning process,the copper in the molybdenum cleaning tail can be enriched to 1.78%,which has certain economic value.In order to efficiently recover copper metal from molybdenum cleaning-scavenging tail,the key experimental studies on dehydration,the pH of flotation,the type and dosage of collector,the regrinding fineness were systematically carried out.The test results show that the process flow of one roughing-two scavenging-four cleaning is adopted,a copper concentrate with the concentrate grade of 21.49%and the operating recovery rate of 79.41%can be obtained when the dosage of pH regulator lime is 50 g/t,the dosage of copper collector Z200 is 28 g/t,the dosage of foaming agent 2#oil is 1.3 g/t.