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 PbCl 2 is as an important factor with respect to the brine concentration and pulp density in lixiviant. The dissociated sulfate ions hinder the formation of PbCl 2 on prolong leaching (above 60 min), while exhibiting the reverse solubility of lead as PbSO 4. 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.
CITATION STYLE
Srivastava, R. R., Lee, J., Nguyen, T. T., Kim, M., & Kang, J. (2018). Hydrometallurgical Extraction of Lead in Brine Solution from a TSL Processed Zinc Plant Residue (pp. 1205–1212). https://doi.org/10.1007/978-3-319-95022-8_97
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