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Direct Extraction of Nickel and Copper from Low-Grade Nickel Sulfide Ore by Chlorination Roasting with Mixed MgCl2·6H2O and NaCl

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Abstract

A new extraction technology of chlorination roasting with a mixture of MgCl2·6H2O and NaCl was investigated to co-extract nickel and copper from low-grade nickel ores. The effects of some key factors on the extraction of nickel, copper, and iron were studied, and the results show that,when the roasting temperature is 850°C, the roasting time is 1.5 h, the mass ratio of magnesium chloride hexahydrate to sodium chloride is 5:2, the mass ratio of ore to chlorination agent is 1:0.6, and the ore particle size is 180–200 mesh, the extraction of nickel and copper can reach 83.6% and 81.3%, respectively, but less than 3% of impurity iron enters the leach solution. XRD and SEM were used to analyze the mineral phase of the roasted products and leach residue to determine the phase transformation. The kinetics of the chlorination process were investigated by the Kissinger and Flynn–Wall–Ozawa method to determine the average activation energy and the kinetic equation.

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Acknowledgements

The authors thank the National Natural Science Foundation of China (No. 52074069), the Natural Science Foundation of Hebei Province (No. E2020501022), the Science and Technology Project of Hebei Education Department (No. ZD2021331) and the Fundamental Research Funds for the Central Universities (No. N182304016) for the financially supported of this research.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, Liaoning, China

    Xueqing Xu & Shaohua Luo

  2. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, Hebei, China

    Xueqing Xu, Wenning Mu, Haixia **n, Xuefei Lei, Shaohua Luo & Yuchun Zhai

  3. School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, China

    Wenning Mu, Haixia **n, Xuefei Lei & Yuchun Zhai

  4. Key Laboratory of Resources Cleaner Conversion and Efficient Utilization Qinhuangdao City, Qinhuangdao, 066004, Hebei, China

    Xueqing Xu, Wenning Mu, Haixia **n, Xuefei Lei, Shaohua Luo & Yuchun Zhai

  5. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan, 063210, Hebei, China

    Le Wang

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  1. Xueqing Xu
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Xu, X., Mu, W., Wang, L. et al. Direct Extraction of Nickel and Copper from Low-Grade Nickel Sulfide Ore by Chlorination Roasting with Mixed MgCl2·6H2O and NaCl. JOM 74, 1989–1999 (2022). https://doi.org/10.1007/s11837-021-05122-x

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  • DOI: https://doi.org/10.1007/s11837-021-05122-x

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