赞比亚某铜矿石工艺矿物学研究

Study on Process Mineralogy for a Copper Ore in Zambia

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。

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 that①the mineral composition is complex and the main useful minerals include hema-tite-limonite,magnetite,chalcosiderite, green chalcosiderite, pseudo-malachite and so on.②the mineral structures mainly in-clude 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.