Abstract
Large amounts of lead–silver slag and a low recycling rate cause environmental pollution and the waste of metal resources. In this paper, a melting–fuming method is used to treat lead–silver slag. Thermodynamic analysis, the melting–fuming procedure, and response surface optimization were performed to investigate the phase evolution of the antimony element. The influence of reaction temperature, carbon ratio, and holding time on antimony recovery is also investigated. The results show that Sb2O3 and Sb2O4 are the main phases containing Sb in the dust. With the increase of the reaction temperature and the holding time, the recovery rate of antimony gradually increases and reaches 80.19% and 81.97% at 1250°C and 120 min, respectively; The recovery of antimony first increases and then decreases with the increase of the carbon ratio and reaches the highest value at 16.30%; The recovery rate of antimony reaches 82.54% in the optimal conditions of a reaction temperature of 1290°C, a carbon ratio of 17.60%, and a holding time of 125 min. This paper provides theoretical guidance for the recovery and reuse of antimony from lead–silver slag.
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Acknowledgements
The authors gratefully acknowledge the financial support from the Science and Technology Major Project Plan of Gansu Province Grant Nos. (19ZD2GD001), the National Natural Science Foundation of China Grant Nos. (52164034, and U22A20175) and Jinchang Science and Technology Plan-Youth Talent Fund Grant Nos. (2022JC00019).
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Science and Technology Major Project Plan of Gansu Province (19ZD2GD001), National Natural Science Foundation of China (52164034, U22A20175) and Jinchang Science and Technology Plan-Youth Talent Fund (2022JC00019).
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Shen, Y., Liu, T., Zhou, S. et al. Phase Evolution and Recovery Rate of Sb in Lead–Silver Slag Treated via Melting–Fuming Method. JOM 75, 5709–5717 (2023). https://doi.org/10.1007/s11837-023-06204-8
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DOI: https://doi.org/10.1007/s11837-023-06204-8