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Research and Industrial Application of a Process for Direct Reduction of Molten High-Lead Smelting Slag

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Abstract

A pyrometallurgical process for the direct reduction of molten high-lead smelting slag obtained by the Shuikoushan (SKS) method was reported in this article using solid anthracite as the fuel and reductant. The chemical composition, the lead phase composition, and the physical properties of the molten high-lead slag were examined. The effects of the process parameters on the recovery rate of valued metals were investigated in the laboratory. According to the experimental results, a new efficient bottom blow reduction furnace was employed in the pilot-scale test for high-lead slag reduction. The results showed the average recovery rate of lead was more than 96.0% with lower Pb and high Zn content of the reducing slag under the condition of reduction temperature 1100–1200°C, coal ratio 5.5–7.5%, reduction time 90–150 min, CaO/SiO2 ratio 0.35–0.45, and FeO/SiO2 ratio 1.4–1.55. Moreover, nearly 250 kg of standard coal per ton of crude Pb output was reduced compared with the blast furnace reduction process.

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Acknowledgements

The authors would like to express sincere thanks to the National High Technology Research and Development Program of China in supporting this research project (2011AA061002).

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Authors and Affiliations

  1. School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, People’s Republic of China

    Weifeng Li, Jing Zhan & Chuanfu Zhang

  2. Henan Yuguang Gold & Lead Co., Ltd., Jiyuan, 454650, Henan, People’s Republic of China

    Weifeng Li

  3. Beijing General Research Institute of Mining & Metallurgy, Beijing, 100160, People’s Republic of China

    Yanqing Fan

  4. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, Yunnan, People’s Republic of China

    Chang Wei

  5. Department of Materials Science and Engineering, Michigan Technological University, Houghton, MI, USA

    Jiann-Yang Hwang

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  1. Weifeng Li
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  2. Jing Zhan
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  3. Yanqing Fan
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  4. Chang Wei
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  5. Chuanfu Zhang
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  6. Jiann-Yang Hwang
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Correspondence to Jing Zhan.

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Li, W., Zhan, J., Fan, Y. et al. Research and Industrial Application of a Process for Direct Reduction of Molten High-Lead Smelting Slag. JOM 69, 784–789 (2017). https://doi.org/10.1007/s11837-016-2236-z

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  • DOI: https://doi.org/10.1007/s11837-016-2236-z

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