|About this Abstract
||Part C-1: Hydrometallurgy 2018
||Hydrometallurgical Extraction of Lead in Brine Solution from a TSL Processed Zinc Plant Residue
||Rajiv R. Srivastava, Jae-chun Lee, Tam Thi Nguyen, Min-seuk Kim, Jingu Kang
|On-Site Speaker (Planned)
||Rajiv R. Srivastava
Brine leaching of a TSL processed zinc-plant residue (ZPR) containing 83.3% anglesite mineral 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 the solubility limits of PbCl2 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 for lead present as anglesite (PbSO4). A 3-step leaching process could yield > 92% leaching efficiency while maintaining the parameters as: 10% pulp density in a 250 g/L NaCl solution, 80 °C temperatures, 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.
||Planned: At-meeting proceedings