刚果(金)某氧化铜钴矿还原浸出试验  

Reduction Leaching Test of a Copper-Cobalt Oxide Ore in Congo (DRC)

作　　者：王福元 余浔 王立刚 陈少学 张帆[1] 周峰 WANG Fuyuan;YU Xun;WANG Ligang;CHEN Shaoxue;ZHANG Fan;ZHOU Feng(China Nerin Engineering Co.,Ltd.;BGRIMM Technology Group;Sinosteel Maanshan General In-stitute of Mining Research Co.,Ltd.;State Key Laboratory of Safety and Health for Metal Mines;Hua-wei National Engineering Research Center for Efficient Recycling of Metallic Mineral Resources Co.,Ltd.)

机构地区：[1]中国瑞林工程技术股份有限公司 [2]矿冶科技集团有限公司 [3]中钢集团马鞍山矿山研究总院股份有限公司 [4]金属矿山安全与健康国家重点实验室 [5]华唯金属矿产资源高效循环利用国家工程研究中心有限公司

出　　处：《现代矿业》2024年第5期157-160,共4页Modern Mining

摘　　要：刚果(金)某氧化铜钴矿铜、钴品位分别为3.93%和1.52%,矿石氧化率高,含碳酸盐脉石矿物少,磨矿解离效果好,适宜采用原矿直接酸性搅拌浸出工艺回收铜、钴。为了经济高效地回收该矿石中的铜、钴资源,从影响酸耗和浸出率多因素开展了还原浸出试验研究。试验结果表明:在磨矿细度-0.074 mm70%、亚硫酸钠用量32 kg/t、七水硫酸亚铁用量15 kg/t、液固比3∶1、浸出时间5 h、pH值1.3~1.5的优化条件下,可获得铜浸出率97.84%、钴浸出率95.37%、脉石酸耗35.80 kg/t、总酸耗119.54 kg/t的技术经济指标,还原酸浸工艺有效地回收了该矿石中的铜、钴资源。The grade of copper and cobalt in a copper-cobalt oxide ore of Congo(DRC)is 3.93%and 1.52%respectively.The ore has high oxidation rate,less carbonate gangue minerals and good grinding dis⁃sociation effect.It is suitable to recover copper and cobalt by direct acid stirring leaching process of raw ore.In order to economically and efficiently recover the copper and cobalt resources in the ore,the reduc⁃tion leaching test is carried out from the factors affecting acid consumption and leaching rate.The results show that under the optimal conditions of grinding fineness of-0.074 mm 70%,sodium sulfite dosage of 32 kg/t,ferrous sulfate heptahydrate dosage of 15 kg/t,liquid-solid ratio of 3∶1,leaching time of 5 h and pH val⁃ue of 1.3~1.5,the technical and economic indexes of copper leaching rate of 97.84%,cobalt leaching rate of 95.37%,gangue acid consumption of 35.80 kg/t and total acid consumption of 119.54 kg/t can be obtained.The copper and cobalt resources in the ore are effectively recovered by the reduction acid leach⁃ing process.

关 键 词：氧化铜钴矿 孔雀石 水钴矿 还原浸出 

分 类 号：TF81[冶金工程—有色金属冶金]