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Comprehensive recovery of lead, zinc, and iron from hazardous jarosite residues using direct reduction followed by magnetic separation

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Abstract

Lead, zinc, and iron were recovered from jarosite residues using direct reduction followed by magnetic separation. The influence of the coal dosage, reduction temperature, and reduction time on the volatilization rates of lead and zinc and the metallization rate of iron were investigated. The results show that the volatilization rates of lead and zinc were 96.97% and 99.89%, respectively, and the iron metallization rate was 91.97% under the optimal reduction roasting conditions of a coal dosage of 25.0wt% and reduction roasting at 1250°C for 60 min. The magnetic concentrate with an iron content of 90.59wt% and an iron recovery rate of 50.87% was obtained under the optimum conditions in which 96.56% of the reduction product particles were smaller than 37 μm and the magnetic field strength was 24 kA/m. Therefore, the results of this study demonstrate that recovering valuable metals such as lead, zinc, and iron from jarosite residues is feasible using the developed approach.

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Authors and Affiliations

  1. Key Laboratory for High-Efficient Mining and Safety of Metal Mines of Ministry of Education, University of Science and Technology Beijing, Beijing, 100083, China

    Ya-yun Wang, Hui-fen Yang, Bo Jiang, Rong-long Song & Wei-hao Zhang

  2. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Ya-yun Wang, Hui-fen Yang, Bo Jiang, Rong-long Song & Wei-hao Zhang

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  1. Ya-yun Wang
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  2. Hui-fen Yang
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Correspondence to Hui-fen Yang.

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Wang, Yy., Yang, Hf., Jiang, B. et al. Comprehensive recovery of lead, zinc, and iron from hazardous jarosite residues using direct reduction followed by magnetic separation. Int J Miner Metall Mater 25, 123–130 (2018). https://doi.org/10.1007/s12613-018-1555-1

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  • DOI: https://doi.org/10.1007/s12613-018-1555-1

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