九江某含铜多金属矿工艺矿物学研究

Study on Process Mineralogy of a Copper-Containing Polymetallic Ore in Jiujiang

为了高效利用九江某铜矿,针对其铜矿物组成复杂、铜损失较多等问题,通过采用MLA等仪器对其浮选尾矿中铜的赋存状态进行了研究。研究结果表明:该矿石中的铜主要以原生硫化铜的形式存在,其分布率达88.09%;其余部分主要为次生硫化铜,分布率占10.12%;铜矿物总体属细粒嵌布,+0.074 mm粒级占60.18%,+0.037 mm粒级占82.52%,+0.019 mm粒级占95%;方铅矿和闪锌矿粒度较细小,+0.074 mm粒级分别占40.25%和58.58%;从矿物粒度考虑,黄铜矿在磨矿过程中解离度会低于黄铁矿,-2 mm原矿中铜矿物和黄铁矿的解离度分别达34.5%和59.5%。

In order to efficiently utilize a copper ore in Jiujiang,aiming at the problems of complex copper mineral composition and more copper loss,the embedded characteristics of copper in flotation tailings was studied by using MLA and other instruments.The results show that the copper in the ore mainly exists in the form of primary copper sulfide,and its distribution rate is 88.09%.The rest is mainly secondary copper sulfide,accounting for 10.12%.The copper minerals are generally fine-grained,with+0.074 mm fraction accounting for 60.18%,+0.037 mm fraction accounting for 82.52%,and+0.019 mm fraction accounting for 95%.The grain size of galena and sphalerite is small,and the+0.074 mm fraction accounts for 40.25%and 58.58%,respectively.Considering the particle size of minerals,the liberation degree of chalcopyrite is lower than that of pyrite during the grinding process.The dissociation degree of copper minerals and pyrite in-2 mm raw ore is 34.5%and 59.5%respectively.