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针对刚果(金)Kambove矿区氧化铜钴矿钴浸出率不高的问题，采用MLA、偏光显微镜、SEM等手段对该氧化铜钴矿的矿物学特征进行分析，并在此基础上，分别研究了以焦亚硫酸钠、Fe粉、SO2气体为还原剂浸出该矿石中的钴，考察了不同还原剂及用量对浸出效果的影响。结果表明：矿石中主要的铜矿物为假孔雀石、孔雀石、磷铜矿；主要的钴矿物为铜钴硬锰矿和水钴矿，主要的脉石矿物为粉砂岩、石英、绢云母、绿泥石；矿石中铜、钴赋存状态复杂，钴矿物粒度细小且多为包裹体，钴理论浸出率为92.82%;3种还原剂对钴浸出效果中SO2的浸出效果最好，在液固体积质量比3∶1、硫酸用量26.7 g/L、SO2通入量为理论量的1.7倍、反应温度38℃、反应时间3 h最佳浸出条件下，钴浸出率为85.48%,接近理论浸出率。研究结果可为Kambove矿区钴资源的高效利用提供理论和技术支持。
Abstract：In response to the issue of low cobalt leaching rate from oxidized copper-cobalt ore in the Kambove mining area of Congo(DRC),the mineralogical characteristics of the ore were analyzed by Mineral Liberation Analysis(MLA),polarized light microscopy, and Scanning Electron Microscopy(SEM).Based on the findings, leaching of cobalt from the ore with sodium pyrosulfite, Fe powder and SO2 as reducing agents was studied.The influence of different reducing agents and dosage on the leaching effect was investigated.The resluts reveal that the primary copper minerals in the ore are pseudomalachite, malachite, and libethenite, while the main cobalt minerals are copper-cobalt-bearing manganese oxide and heterogenite.The gangue minerals predominantly consist of siltstone, quartz, sericite, and chlorite.The occurrence states of copper and cobalt in the ore are complex, with cobalt minerals being fine-grained and mostly occurring as inclusions.The theoretical leaching rate of cobalt is calculated to be 92.82%.Compared with the three reducing agents, the leaching effect of SO2 is better.Under the optimal conditions of liquid volume to solid mass ratio of 3∶1,sulfuric acid dosage of 26.7 g/L,SO2 amount at 1.7 times the theoretical amount, reaction temperature of 38 ℃,and reaction duration of 3 h, the cobalt leaching rate can reach 85.48%,approaching the theoretical maximum.The research results can provide both theoretical and technical support for the efficient utilization of cobalt resources in the Kambove mining area of Congo(DRC).
[1] 谢洪珍.还原浸出—除杂—活性氧化镁沉淀工艺从刚果金某氧化铜钴矿中回收钴[J].矿产保护与利用，2021,41(5):50-54.XIE Hongzhen.Study on recovering cobalt from the congo cobalt-containing copper oxide ore by reduction leaching-impurities removal-cobalt precipitation with active magnesium oxide[J].Conservation and Utilization of Mineral Resources,2021,41(5):50-54.
[2] DEHAINE Q,TIJSSELING L T,GLASS H J,et al.Geometallurgy of cobalt ores:a review[J].Minerals Engineering,2021,160.DOI:10.1016/j.mineng.2020.106656.
[3] 曹耀华，王威，刘红召，等.从某铜钴氧化矿石中浸出铜钴试验研究[J].湿法冶金，2020,39(6):478-482.CAO Yaohua,WANG Wei,LIU Hongzhao,et al.Leaching of copper and cobalt from copper-cobalt oxide ore[J].Hydrometallurgy of China,2020,39(6):478-482.
[4] 肖天祥.某氧化铜钴矿酸浸试验研究[J].甘肃冶金，2014,36(5):8-10.XIAO Tianxiang.Experimental study on acid leaching of a copper-cobalt oxide[J].Gansu Metallurgy,2014,36(5):8-10.
[5] 周应华，江少卿.刚果(金)铜钴矿业开发形势[J].地质与勘探，2010,46(3):525-530.ZHOU Yinghua,JIANG Shaoqing.Situation of copper-cobalt mine development in Congo (DRC)[J].Geology and Prospecting,2010,46(3):525-530.
[6] 张学良，胡远档，杨明德，等.刚果(金) Kambove矿区矿床特征及找矿方向[J].矿产与地质，2017,31(4):726-730.ZHANG Xueliang,HU Yuandang,YANG Mingde,et al.Characteristics and prospecting direction of deposits of Kambove mining area in the D.R.Congo[J].Mineral Resources and Geology,2017,31(4):726-730.
[7] ROBB L,CAILTEUX J,SUTTON S.Recent advances in the geology and mineralization of the Central African Copperbelt[J].Journal of African Earth Sciences,2005,42(1).DOI:10.1016/j.jafrearsci.2005.11.001.
[8] 肖剑，肖文进，刘孝年，等.刚果(金)加丹加省利卡西MABEL铜钴矿地质特征及找矿方向[J].矿产勘查，2020,11(2):359-364.XIAO Jian,XIAO Wenjin,LIU Xiaonian,et al.Geological characteristics and prospecting direction of the MABEL copper-cobalt deposit in Licasi,Katanga Province,D.R.Congo[J].Mineral Exploration,2020,11(2):359-364.
[9] 张岩.刚果(金)上加丹加省坎博韦(Kambvo)地区铜钴矿床含矿地层及其矿化特征[J].科技创新与应用，2017,7(26):191.ZHANG Yan.Ore-bearing strata and mineralization characteristics of copper-cobalt deposits in Kambvo area,Upper Katanga Province,Democratic Republic of Congo[J].Technology Innovation and Application,2017,7(26):191.
[10] 陈雄，李亚新，江源，等.刚果(金)某低品位氧化铜钴矿强化还原浸出试验研究[J].有色金属工程，2023,13(6):66-72.CHEN Xiong,LI Yaxin,JIANG Yuan,et al.Experimental study on enhanced reduction leaching of a low grade copper cobalt oxide from D.R.Congo[J].Nonferrous Metals Engineering,2023,13(6):66-72.
[11] 王刚.从刚果(金)某低品位氧化铜钴矿石中浸出铜钴试验研究[J].湿法冶金，2023,42(5):469-473.WANG Gang.Leaching of copper and cobalt from a low grade copper-cobalt oxide ore in Congo (Kinshasa)[J].Hydrometallurgy of China,2023,42(5):469-473.
[12] ZHENG C Z,JIANG K X,CAO Z M,et al.Agitation leaching behavior of copper-cobalt oxide ores from the Democratic Republic of the Congo[J].Minerals,2023,13(6).DOI:10.3390/min13060743.
[13] 陈露露，郑朝振，李贺，等.刚果(金)某氧化铜钴矿酸浸试验研究[J].中国资源综合利用，2019,37(5):7-10.CHEN Lulu,ZHENG Chaozhen,LI He,et al.Study of acid leaching process for a Cu-Co oxidized concentrate from Dr Congo[J].China Resources Comprehensive Utilization,2019,37(5):7-10.
[14] DEHAINE Q,TIJSSELING T L,ROLLINSONOLL K G,et al.Flotation of a copper-cobalt sulphide ore:quantitative insights into the role of mineralogy[J].Minerals Engineering,2024,218.DOI:10.1016/j.mineng.2024.108958.
[15] SANTORO L,TSHIPENG S,PIRARD E,et al.Mineralogical reconciliation of cobalt recovery from the acid leaching of oxide ores from five deposits in Katanga (DRC)[J].Minerals Engineering,2019,137:277-289.
[16] 舒方霞，詹光，姜超，等.非洲低品位氧化铜钴矿硫酸体系下SO2强化还原浸出工艺研究[J].有色矿冶，2022,38(2):32-34.SHU Fangxia,ZHAN Guang,JIANG Chao,et al.Technical study on SO2 strengthening reduction leaching of low-grade copper-cobalt oxide ore from africa in sulfuric acid system[J].Non-Ferrous Mining and Metallurgy,2022,38(2):32-34.
[17] 杨显万，何蔼平，袁宝州.高温水溶液热力学数据计算手册[M].北京：冶金工业出版社，1983.
基本信息:
DOI：10.13355/j.cnki.sfyj.2025.03.003
中图分类号:TD91;TF816
引用信息:
[1]赵亚茹,肖发新,李辉等.刚果（金）Kambove矿区氧化铜钴矿的工艺矿物学特征及钴浸出探讨[J].湿法冶金,2025,44(03):301-308.DOI:10.13355/j.cnki.sfyj.2025.03.003.
基金信息:
中国有色集团科技项目(2023KJZX027); 国家重点研发计划(2020YFC1909003)