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TY - JOUR T2 - Journal of Mining and Metallurgy, Section B: Metallurgy TI - Sb recovery from an As pre-removed lead anode slime using a ZnS-Na2CO3 smelting reduction VL - 60 IS - 2 SP - 177 EP - 189 PY - 2024 DA - 26 September 2024 DO - 10.2298/JMMB231230017D UR - https://doi.org/10.2298/JMMB231230017D AU - Dong, Z.-Q. AU - Zhang, R. AU - Sun, Y.-X. AU - Gu, Z.-D. AU - Guo, X.-Y. AU - Li, Lei Wang, S.-S. AD - a Central South University, School of Metallurgy and Environment, Changsha, China; b Shandong Humon Smelting CO., LTD, Yantai, China; c Donghua University, College of Environmental Science and Engineering, Shanghai, China; AB - Lead anode slime is produced in large quantities during lead electrolysis, which has a high Sb content of 10-50 wt% and can be easily recycled. However, in a general alkaline pressure leaching process for pre-removal of As, Sb was partially converted to Na3SbO4 with high stability. This limited the Sb reduction and recovery in the subsequent Na2CO3 smelting reduction. Considering this fact, ZnS was creatively used as an additive in this study to destroy the stable structure of Na3SbO4 and increase Sb reduction, and meanwhile ZnS was reduced to volatile Zn (g) and recycled. In a certain range, increasing the amount of coke and ZnS increased the Sb yield, and Pb recycling could be accelerated. However, when an excessive amount of ZnS was added, the Sb compounds could be sulfurized and then combined with the generated PbS and Na2S, forming a sodium matte of Na-Pb-Sb-S. This limited the Sb reduction and reduced the Sb yield. Under the optimum conditions of a coke content of 13%, a ZnS/Sb molar ratio of 0.32, a smelting temperature of 1200 癈 and a holding time of 90 min, Sb, Pb and Zn yields of up to 94.8%, 96.1% and 98.9%, respectively, were obtained. KW - As pre-removed lead anode slime KW - Sb recovery KW - ZnS KW - Phase transformation KW - Smelting reduction N1 - Correspondence Address: X.-Y. Guo; L. Li ; Central South University, School of Metallurgy and Environment, Changsha, China; Donghua University, College of Environmental Science and Engineering, Shanghai, China; email: xyguo@csu.edu.cn; tianxiametal1008@dhu.edu.cn N1 - J. Min. Metall. Sect. B-Metall., 60 (2) (2024) 177-189. doi:10.2298/JMMB231230017D PB - Technical Faculty in Bor SN - 1450-5339 (ISSN) LA - English J2 - J. Min. Metall. Sect. B Metall. M3 - Article ER -