赞比亚某铜矿石工艺矿物学研究

赞比亚某铜矿石属结合相占比较高的氧化矿石，铜品位为2.10%，伴生有价元素铁、金、银、钴品位分别为24.20%、0.20 g/t、7.60 g/t、0.05%。为确定该矿石的合理选矿工艺流程，对矿石进行了工艺矿物学研究。结果表明：①该矿石的矿物组成较复杂，主要有用矿物有赤褐铁矿、磁铁矿、磷铜铁矿、绿磷铁铜矿、假孔雀石等。②矿石的构造主要有多孔状、团块状、浸染团粒状、条纹条带状、圈层状、变胶状、晶洞状、细脉状构造；矿石的结构主要有他形粒状结构，隐晶质结构，束状、梳状、柱状结构，交代结构。③磷铜铁矿、绿磷铁铜矿、假孔雀石中的铜分别占总铜的41.03%、40.27%、15.35%，磷铜铁矿、绿磷铁铜矿均为隐晶质集合体，粒度较细，集合体粒度一般均为0.01～0.5 mm，假孔雀石粒度一般为0.01～0.4 mm，少量可达0.8 mm；赤褐铁矿粒度一般为0.01～0.5 mm，少量达4 mm；磁铁矿粒度较大，一般为0.1～0.2 mm。因此，该铜矿石属难选多金属氧化矿石。

Study on Process Mineralogy for a Copper Ore in Zambia

A certain copper ore in Zambia is a kind of oxidized ore with high proportion of combined phases，in which the grade of copper is 2.10%，and grade of other associated valuable elements such as Fe，Au，Ag，and Co are 24.20%，0.20 g/t，7.60 g/t，and 0.05% respectively.In order to determine the proper beneficiation process，study on process mineralogy of this copper ore was made.The results show that ①the mineral composition is complex and the main useful minerals include hematite-limonite，magnetite，chalcosiderite，green chalcosiderite，pseudo-malachite and so on.②the mineral structures mainly include vesicular，crumby，disseminated granular，riband-striped，circle-like，metacolloform，miarolitic，and veinlet structures，the mineral textures mainly include xenomorphic granular，cryptocrystalline，sarciniform，pectination，columnar and metasomatic.③copper in chalcosiderite，green chalcosiderite and pseudo-malachite account for 41.03%，40.27%，and 15.35% of the total copper respectively.Chalcosiderite and green chalcosiderite are all cryptocrystalline aggregation with particle size of 0.01～0.5 mm.The particle size of pseudo-malachite is generally within the range from 0.01 to 0.4 mm，and few reach up to 0.8 mm.The particle size of hematite-limonite is generally within the range from 0.01 to 0.5 mm，and few reach up to 4 mm.The particle size of magnetite is larger，which is generally within the range from 0.1 to 0.2 mm.Therefore，this kind of copper ore belongs to refractory multi-metal oxidized ore.