摘要:
斑岩型铜钼矿是当前提取铜、钼的重要资源,其中铜矿物主要以黄铜矿为主,钼矿物一般以辉钼矿的形式存在.该类矿石中辉钼矿多与黄铜矿、黄铁矿密切共生,此外,由于辉钼矿与黄铜矿的可浮性相似,因此从铜钼矿石中回收辉钼矿难度较大,工艺也较为复杂.本文研究对象为云南某斑岩型铜钼矿,其主要矿物为黄铜矿与辉钼矿,嵌布粒度较细.对该矿进行的选矿工艺研究表明,矿石经过原矿粗磨,粗精矿再磨,1粗2精2扫、中矿顺序返回进行铜钼混浮;铜钼精矿进行脱药再磨,1粗5精1扫、中矿顺序返回进行铜钼分离,最终得到了铜品位25.91%,铜精矿回收率78.68%,钼品位45.79%,钼精矿回收率77.49%的良好指标,有效实现了铜钼分离、铜钼回收的目的,对实际工业生产中同类矿石的分选利用有着积极的指导作用,对我国铜钼矿资源的综合利用亦有着重要意义.
关键词:
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黄铜矿
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辉钼矿
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铜钼混浮
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铜钼分离
Abstract:
Porphyry copper molybdenum deposit is the important resource which copper and molybdenum can be extracted.The copper mineral mainly exists in the form ofchalcopyrite and the molybdenum mineral is generally in the form of molybdenite.The molybdenite is closely associated with chalcopyrite and pyrite in this kind of ore,in addition,because of the molybdenite and chalcopyrite can be floating similarly,so it is difficult to recover molybdenite from the copper molybdenum ore,and the technology is complex.The object of study is a Yunnan porphyry copper ore in this article,and the main mineral is chalcopyrite and molybdenite,which is disseminated finely.The test resuits showed that the copper concentrate with grade of 25.91% and recovery of 78.68%,and the molybdenum concentrate with grade of 45.79% and recovery of 88.35% were achieved with closed-circuit process of the coarse grinding and regrinding of coarse concentrate,one roughing,two cleaning,two scavenging and middles back to the flow-sheet in turn for copper and molybdenum mixed flotation,copper and molybdenum mixed concentrate removal of the flotation reagent,regfinding and with the closed-circuit process of one roughing,five cleanings,one scavenging and middling back for copper and molybdenum separation flotation.The indicators are good and it is effective for the separation and recovery of copper and molybdenum.It gives a positive guide for the industrial production to deal with the similar ore,and the significance of copper molybdenum ore resources comprehensive utilization is also important.
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