巴西某多金属铜矿石工艺矿物学研究及可选性分析  

Process Mineralogical Study and Selectability Analysis on a Polymetallic Copper Ore in Brazil

作　　者：李硕夫 朱律 朱景和 LI Shuofu;ZHU Lyu;ZHU Jinghe(China Nonferrous Metal Mining(Group)Co.,Ltd.,Beijing 100029,China;North China University of Technology,Beijing 100144,China)

机构地区：[1]中国有色集团,北京100029 [2]北方工业大学,北京100144

出　　处：《矿业研究与开发》2024年第9期227-232,共6页Mining Research and Development

摘　　要：为了有效地选别回收巴西某多金属铜矿石的中铜矿物和铁矿物,利用化学多元素分析、光学显微镜和矿物自动分析仪(MLA)等手段,对矿石的矿物组成、矿物赋存状态、矿物嵌布特征和解离特性进行了系统的研究。结果表明,矿石铜品位0.8%、铁品位25.39%;矿石中铜矿物以斑铜矿、黄铜矿为主,含少量辉铜矿孔雀石,矿石中硫化铜矿物集合体的粒度粗细不均,但细粒占比较高;铁矿物以磁铁矿为主,赤铁矿、菱铁矿和钛铁矿的含量较低,磁铁矿的粒度较粗,其中+0.074 mm粒级占73.56%;脉石矿物主要有紫苏辉石、镁铁闪石、黑云母、斜长石、镁铝尖晶石、绿泥石、钙铝榴石、石英等。当磨矿细度为-0.074 mm粒级占70%时,硫化铜矿物集合体的解离度为66.94%,磁铁矿的单体解离度为81.97%。针对该矿石建议采用优先选铜,尾矿磁选回收铁的工艺对铜、铁进行综合回收。In order to better separate and recover copper minerals and iron minerals from a polymetallic copper ore in Brazil,a systematic study was conducted on the mineral composition,mineral occurrence state,mineral embedding characteristics,and dissociation characteristics of the raw ore using chemical multi-element analysis,optical microscopy,and multi-layered approach(MLA).The results show that the copper grade of the ore is 0.8%,and the iron grade is 25.39%.The copper minerals in the ore are mainly bornite and chalcopyrite,with a small amount of chalcocite malachite.The particle size of copper sulfide mineral aggregates in ores is uneven,but the proportion of fine particles is relatively high.The iron minerals are mainly magnetite,with small contents of hematite,siderite,and ilmenite.The particle size of magnetite is coarser,with+0.074 mm particle size accounting for 73.56%.Gangue minerals mainly include perillarite,mafic amphibole,biotite,plagioclase,magnesium-aluminum spinel,chlorite,grossular garnet,quartz,etc.When the grinding fineness is-0.074 mm accounting for 70%,the dissociation degree of the copper sulfide mineral aggregate is 66.94% and the single dissociation degree of magnetite is 81.97%.In summary,it is recommended to use the process of preferential copper separation and magnetic separation of tailings to recover iron for this ore to comprehensively recover copper and iron.

关 键 词：多金属铜矿石 嵌布特征 赋存状态 解离特性 

分 类 号：TD912[矿业工程—选矿] TD951