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Selective Extraction of Cobalt and Copper From Cobalt-Rich Copper Sulfide Ores

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Abstract

Cobalt, as a key element of LiNixCoyMnzO2 cathode materials, is becoming progressively crucial. The cobalt-rich copper sulfide ores in Africa are one of the most important cobalt resources in the world. However, few literatures aimed at cobalt-rich copper sulfide ores were reported. In this study, the process of activation roasting followed by sulfuric acid leaching was proposed to attain phase transformation and efficient leaching of cobalt and copper. First, the systematic investigation of the mineralogical characterization was performed. The main compositions were carrollite and gangue minerals represented by quartz and talc. The ore could be considered as typical cobalt-rich copper sulfide ores. Subsequently, the feasibility of the process was verified by thermodynamic calculation and by conducting a series of experiments. Under optimal conditions, the extraction of cobalt and copper reached 86.2 and 95.9 pct, respectively. Then, the phase transformation of main minerals during the activation roasting was studied. The original metal sulfides were transformed into products dominated by metal oxides and metal sulfates, which were consistent with the thermodynamic analysis. Finally, preliminary industrial production study and economic accounting proved the industrial feasibility of the process, which can achieve efficient and selective extraction of cobalt and copper from cobalt-rich copper sulfide ores.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. U2202254, 51974025, 52034002) and the Fundamental Research Funds for the Central Universities (No. FRF-TT-19-001).

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The corresponding authors state that there is no conflict of interest.

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Correspondence to Yubo Liu or Baozhong Ma.

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Yang, W., Liu, Y., Li, X. et al. Selective Extraction of Cobalt and Copper From Cobalt-Rich Copper Sulfide Ores. Metall Mater Trans B 54, 2332–2346 (2023). https://doi.org/10.1007/s11663-023-02834-0

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