刚果(金)某复杂难选氧化铜矿选矿试验研究  

Experimental Study on Beneficiation of a Complex Refractory Copper Oxide Ore in Congo (DRC)

作　　者：张汉彪 薛伟[2] Zhang Hanbiao;Xue Wei(Jiangxi Nonferrous Metals Exploration and Development Institute,Nanchang,Jiangxi,China;Hunan Institute of Nonferrous Metals,Changsha,Hunan,China)

机构地区：[1]江西有色地质矿产勘察开发院,江西南昌330001 [2]湖南有色金属研究院,湖南长沙410100

出　　处：《矿产综合利用》2020年第3期117-120,130,共5页Multipurpose Utilization of Mineral Resources

摘　　要：刚果(金)某复杂难选氧化铜矿铜品位2.47%,钴品位0.12%,铜氧化率为98.96%,结合率为15.82%,铜的赋存状态非常复杂,主要为孔雀石、硅孔雀石、假孔雀石、铜蓝、铜钴锰氧结合物、含铜褐铁矿等,孔雀石、假孔雀石等因吸附作用或机械钙、铁、锰等杂质,导致其可浮性发生变化。通过试验,开发出氧化铜钴矿高效捕收剂,有效提高了铜的浮选回收率,采用浮选-磁选联合的工艺流程,回收了可浮性较差但具有磁性的铜钴锰氧结合物、含铜褐铁矿含铁孔雀石、含铁假孔雀石。最终获得铜品位24.17%、回收率73.08%的浮选铜精矿和铜品位8.14%、铜回收率10.30%的含铜磁选精矿,钴的总回收率达到了66.93%。Copper grade is 2.47%,cobalt grade is 0.12%and copper oxidation rate is 98.96%in a complex refractory copper oxide ore in Congo(DRC).Copper minerals are mainly malachite,silica malachite,pseudomalachite,copper blue,copper-cobalt-iron-manganese complex and copper-bearing limonite.The floatability of malachite and pseudomalachite changes due to adsorption or mechanical mixing of impurities such as calcium,iron and manganese.In this experiment,the flotation recovery of copper was effectively improved by using a combination of high-efficiency collectors and conventional collectors.The flotationmagnetic separation process was used to recover poorly floatable but magnetic copper-cobalt-manganeseoxygen complexes,copper-limonite,iron-bearing malachite and iron-bearing pseudomalachite.Finally,flotation copper concentrate with copper grade 24.17%and recovery 73.08%and magnetic separation copper concentrate with copper grade 8.14%and recovery 10.30%were obtained.The total recovery rate of cobalt reached 66.93%.

关 键 词：氧化铜矿 高效捕收剂 高梯度强磁选 

分 类 号：TD952[矿业工程—选矿]