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A Sustainable and Selective Roasting and Water-Leaching Process to Simultaneously Extract Valuable Metals from Low-Grade Ni-Cu Matte

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Abstract

Due to stringent environmental requirements and the complex occurrence of valuable metals, traditional pyrometallurgical methods are unsuitable for treating low-grade nickel-copper matte. A clean and sustainable two-stage sulfating roasting and water-leaching process was used to simultaneously extract valuable metals from low-grade nickel-copper matte. Ammonium and sodium sulfate were used as sulfating agents. The first roasting temperature, mass ratio of ammonium sulfate to matte, roasting time, dosage of sodium sulfate, second roasting temperature and leaching temperature were studied. Under optimal conditions, 98.89% of Ni, 97.48% of Cu and 95.82% of Co, but only 1.34% of Fe, were extracted. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to reveal the sulfating mechanism during the roasting process.

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Acknowledgements

This research was jointly supported by the National Basic Research Program of China (Grant 2014CB643405), National Natural Science Foundation of China (Grant 51204036), Program for Top Young Talents of Higher Education Institutions of Hebei Province (Grant BJ201604), Fundamental Research Funds for the Central Universities (Grant N152304010) and Hebei Province Natural Science Fund (Grant E2017501073).

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, 110819, China

    Fuhui Cui & Shuai Wang

  2. School of Resources and Materials, Northeastern University at Qinhuangdao Branch, 143 Taishan Road Economic & Technological Development Zone, Qinhuangdao, 066004, Hebei Province, China

    Wenning Mu, Haixia Xin & Yuchun Zhai

  3. The Key Laboratory of Clean Conversion and Efficient Utilization to Resource in Qinhuangdao, Qinhuangdao, 066004, China

    Wenning Mu & Yuchun Zhai

  4. School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China

    Qian Xu

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  1. Fuhui Cui
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  2. Wenning Mu
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  3. Shuai Wang
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  4. Haixia Xin
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  5. Qian Xu
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Correspondence to Wenning Mu.

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Cui, F., Mu, W., Wang, S. et al. A Sustainable and Selective Roasting and Water-Leaching Process to Simultaneously Extract Valuable Metals from Low-Grade Ni-Cu Matte. JOM 70, 1977–1984 (2018). https://doi.org/10.1007/s11837-018-2798-z

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  • DOI: https://doi.org/10.1007/s11837-018-2798-z

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