An Efficient and Environmental Friendly Route for PbS Crystal Recovery from Lead Ash Generated in Tin Removal Section (LATR) via High-speed Leaching and Recrystallization method

  • Wei Zhang Zhengzhou University, Zhengzhou, China 
  • Yakun Feng
  • Xiaoqian Peng
  • Huihui Shi
  • Qiting Zuo
Keywords: Lead ash; PbS crystal; Leaching; Recrystallization; Recovery; Environmental friendly

Abstract


Abstract: This paper mainly investigated on synthesis of high purity PbS crystal directly from lead ash which was collected from Tin ash removal process (LATR). The LATR was firstly disposed by nitric acid leaching system to generate the lead nitrate solution. The generated lead nitrate solution was then mixed with sodium sulfide to synthesize PbS crystal at 25 °C. The effects of molar ratio of HNO3 to Pb in the LATR on Pb leaching efficiency was investigated, the results were demonstrating that the Pb leaching efficiency could attain to 82.9 % at molar ratio of 3. The leaching ratio of As, Cu, Fe, and Al generally increased with increasing molar ratio of HNO3 to Pb in the LATR, while most of Sn was left in the residue. In the process of creating PbS crystal by using the leaching solution, the yield of PbS crystal increased with increasing molar ratio of Na2S to Pb in the filtrate. The yield of PbS could up to 93.1 % at molar ratio of 1.5. Overall, this method proved to be an efficient and environmental friendly route for synthesis of high quality PbS crystal directly from the common lead containing waste from the lead smelting factory.

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J. Min. Metall. Sect. B-Metall., 57 (3) (2021) 301 - 447
Published
2021/11/18
How to Cite
Zhang, W., Feng, Y., Peng, X., Shi, H., & Zuo, Q. (2021). An Efficient and Environmental Friendly Route for PbS Crystal Recovery from Lead Ash Generated in Tin Removal Section (LATR) via High-speed Leaching and Recrystallization method. Journal of Mining and Metallurgy, Section B: Metallurgy, 57(3), 389-400. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/25593
Issue
Vol. 57 No. 3 (2021)
Section
Original Scientific Paper

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