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Experimental Study on Comprehensive Recovery of a Complex Refractory Copper-Cobalt Oxide Ore from DRC
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Changzhen DU1, 2, 3, 4, Guichun HE1, Qingbo MENG2, 3, 4, Xiaoping XU2, 3, 4, Xiaoyi XU2, 3, 4, Lihong YU2, 3, 4
Mining and Metallurgical Engineering | 2026, 46(4) : 131 - 135
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Mining and Metallurgical Engineering | 2026, 46(4): 131-135
• MINERAL PROCESSING •
Experimental Study on Comprehensive Recovery of a Complex Refractory Copper-Cobalt Oxide Ore from DRC
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Changzhen DU1, 2, 3, 4, Guichun HE1, Qingbo MENG2, 3, 4, Xiaoping XU2, 3, 4, Xiaoyi XU2, 3, 4, Lihong YU2, 3, 4
Affiliations
  • 1.School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
  • 2.Institute of Resource Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510651, Guangdong, China
  • 3.State Key Laboratory of Rare Metals Separation and Comprehensive Utilization, Guangzhou 510651, Guangdong, China
  • 4.Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resources, Guangzhou 510651, Guangdong, China
doi: 10.3969/j.issn.0253-6099.2026.04.019
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A comprehensive recovery test was conducted for a complex refractory copper-cobalt oxide ore from the Democratic Republic of the Congo (DRC). A combined process of copper flotation for enrichment followed by high-intensity magnetic separation (HIMS) for cobalt recovery was adopted. Sodium sulfide was used as activator, butyl xanthate as primary collector, TP as auxiliary collector, and No.2 oil as frother. In a closed-circuit test, a flotation process consisting of two-stage roughing, two-stage scavenging, and two-stage cleaning was adopted to preferentially recover copper, and the flotation tailings were then treated by HIMS to recover weakly magnetic cobalt-bearing minerals. Finally, the closed-circuit test produced a copper concentrate grading 16.31% Cu and 0.24% Co with recoveries of 80.82% Cu and 29.41% Co and a cobalt concentrate grading 0.304% Co at 40.34% recovery. It is concluded that this combined process can enhance the floatability of pseudomalachite and chrysocolla through a synergistic effect of sulfide activation and auxiliary collectors, and can also actualize effective recovery of cobalt minerals by HIMS. Accordingly, the overall recovery of copper and cobalt can be significantly enhanced.

copper-cobalt oxide ore  /  sulfidization activation  /  flotation  /  magnetic separation  /  combined flowsheet  /  comprehensive recovery  /  process optimization  /  copper  /  cobalt
杜长臻, 何桂春, 孟庆波, 徐晓萍, 徐晓衣, 余利红. 刚果（金）某复杂难处理氧化铜钴矿综合回收试验研究. 矿冶工程杂志, 2026 , 46 (4) : 131 -135 . DOI: 10.3969/j.issn.0253-6099.2026.04.019
Changzhen DU, Guichun HE, Qingbo MENG, Xiaoping XU, Xiaoyi XU, Lihong YU. Experimental Study on Comprehensive Recovery of a Complex Refractory Copper-Cobalt Oxide Ore from DRC[J]. Mining and Metallurgical Engineering, 2026 , 46 (4) : 131 -135 . DOI: 10.3969/j.issn.0253-6099.2026.04.019
Appendix
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Year 2026 volume 46 Issue 4
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doi: 10.3969/j.issn.0253-6099.2026.04.019
  • Receive Date：2026-03-01
  • Online Date：2026-10-08
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  • Received：2026-03-01
Funding
Affiliations
    1.School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
    2.Institute of Resource Utilization and Rare Earth Development, Guangdong Academy of Sciences, Guangzhou 510651, Guangdong, China
    3.State Key Laboratory of Rare Metals Separation and Comprehensive Utilization, Guangzhou 510651, Guangdong, China
    4.Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resources, Guangzhou 510651, Guangdong, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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