Abstract
Brine leaching of a TSL processed zinc-plant residue (ZPR), containing 83.3% anglesite , has been investigated for lead recovery . A prior treatment of ZPR in acid solution did not show any significant effect of acid concentration in zinc dissolution. The study reveals that the solubility limits of PbCl2 is as an important factor with respect to the brine concentration and pulp density in lixiviant. The dissociated sulfate ions hinder the formation of PbCl2 on prolong leaching (above 60 min), while exhibiting the reverse solubility of lead as PbSO4. A 3-step leaching process could yield >92% leaching efficiency when the parameters were maintained as: 10% pulp density in a 250 g/L NaCl solution, 80 °C temperature, and 60 min time. This leaves the insoluble ferrite, sulfides and oxy-sulfates of zinc and lead in the final residue as revealed by the XRD characterization .
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The paper is based on the Basic Research Project of the Korea Institute of Geoscience and Mineral Resources (KIGAM).
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Srivastava, R.R., Lee, Jc., Nguyen, T.T., Kim, Ms., Kang, J. (2018). Hydrometallurgical Extraction of Lead in Brine Solution from a TSL Processed Zinc Plant Residue. In: Davis, B., et al. Extraction 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-95022-8_97
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DOI: https://doi.org/10.1007/978-3-319-95022-8_97
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