文山低品位难选铜矿的选矿试验研究

发布时间：2018-03-20 22:34

本文选题：低品位铜矿　切入点：混合浮选　出处：《昆明理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：我国铜矿资源比较丰富,但“贫、杂、氧、难”的铜矿资源较多,造成开发利用率较低,且成本较高。随着矿产资源的逐渐枯竭,合理利用低品位的铜矿石也具有越来越重要的意义。论文以云南文山低品位难选铜矿为研究对象,采用MLA对原矿进行了详细的工艺矿物学研究。结果表明：原矿中铜含量为0.25%,主要以黄铜矿的形式存在,分布率为92%;矿石成分较为复杂,共有13种矿物,其中以硅酸盐矿物为主,占84%,其次为硫化物,占11.7%；矿石主要金属矿物为黄铜矿、黄铁矿和闪锌矿,主要脉石矿物为阳起石、绿帘石、绿泥石和石英。本论文对该矿石主要矿物的组成、嵌布和包裹关系进行了深入研究,发现该矿样中的部分铜矿物嵌布粒度较细,且与硫矿物嵌布紧密,需要在较细的磨矿细度下才能使其单体解离,因此必须对该铜硫粗精矿进行再磨,以加强目的矿物之间的解离。试验最终采用铜硫混合浮选-铜硫再磨分离的试验流程,铜硫粗选磨矿细度-200目占70%,再磨细度为-400目占70%,乙硫氮作为铜矿物的捕收剂、石灰作为黄铁矿的抑制剂、MIBC作为起泡剂,通过小型闭路试验获得了品位为21.15%、回收率为87.98%的铜精矿。本研究采用来源广泛常规的浮选药剂,浮选流程操作性强,解决了铜-硫分离困难的难题,为在国内类似矿山推广应用提供了借鉴。
[Abstract]:China is rich in copper resources, but "poor, miscellaneous, oxygen, difficult" copper resources are more, resulting in lower utilization ratio and higher cost. With the gradual depletion of mineral resources, The rational utilization of low grade copper ore is also more and more important. The process mineralogy of the raw ore was studied by MLA. The results show that the copper content in the ore is 0.25, mainly in the form of chalcopyrite, and the distribution rate is 92.The ore composition is more complex, there are 13 kinds of minerals, among which silicate minerals are the main. The main ore minerals are chalcopyrite, pyrite and sphalerite, and the main gangue minerals are actinolite, verdant, chlorite and quartz. It is found that some of the copper minerals in the sample have fine particle size and are closely embedded with sulfur minerals, so it is necessary to make the monomer dissociate under the finer grinding fineness. Therefore, it is necessary to regrinding the copper-sulfur coarse concentrate in order to strengthen the dissociation between the target minerals. Finally, the process of copper-sulfur mixed flotation and copper-sulfur regrinding separation is adopted. The grinding fineness of copper-sulfur coarse grinding is 70 mesh, the fineness of regrinding is -400 mesh, ethylsulfide nitrogen is the collector of copper ore, and lime is used as foaming agent for pyrite inhibitor. A copper concentrate with a grade of 21.15 and a recovery of 87.98% was obtained through a small closed circuit test. The flotation process was operated by using a wide range of conventional flotation reagents, which solved the difficult problem of separation of copper and sulfur. It provides a reference for popularizing and applying similar mines in China.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD952;TD923

【相似文献】