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Efficient and selective recovery of Ni, Cu, and Co from low-nickel matte via a hydrometallurgical process

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Abstract

Low-nickel matte was intensively characterized, and Ni, Cu, and Co were determined to exist mainly as (Fe,Ni)9S8 and FeNi3, Cu5FeS4, and (Fe,Ni)9S8 and Fe3O4 (in isomorphic form), respectively. The efficient and selective extraction of Ni, Cu, and Co from the low-nickel matte in an (NH4)2S2O8/NH3·H2O solution system was studied. The effects of (NH4)2S2O8 and NH3·H2O concentrations, leaching time, and leaching temperature on the metal extraction efficiency were systematically investigated. During the oxidative ammonia leaching process, the metal extraction efficiencies of Ni 81.07%, Cu 93.81%, and Co 71.74% were obtained under the optimal conditions. The relatively low leaching efficiency of Ni was mainly ascribed to NiFe alloy deactivation in ammonia solution. By introducing an acid pre-leaching process into the oxidative ammonia leaching process, we achieved the high extraction efficiencies of 98.03%, 99.13%, and 85.60% for the valuable metals Ni, Cu, and Co, respectively, from the low-nickel matte.

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Acknowledgements

This work was financially supported by the National Basic Research Priorities Program of China (Nos. 2014CB643401 and 2013AA032003), the National Natural Science Foundation of China (No. 51372019), and Shanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related Wastes.

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Authors and Affiliations

  1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Guang-ju Chen, Jian-ming Gao, Mei Zhang & Min Guo

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  1. Guang-ju Chen
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  2. Jian-ming Gao
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  3. Mei Zhang
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Correspondence to Min Guo.

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Chen, Gj., Gao, Jm., Zhang, M. et al. Efficient and selective recovery of Ni, Cu, and Co from low-nickel matte via a hydrometallurgical process. Int J Miner Metall Mater 24, 249–256 (2017). https://doi.org/10.1007/s12613-017-1402-9

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  • DOI: https://doi.org/10.1007/s12613-017-1402-9

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