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<p>Tin-containing polymetallic materials (TCPM) are typical tin-containing secondary resources generated in the process of recovering tin from zinc smelting system. However, TCPM contain a large amount of antimony, zinc and other impurities in addition to the valuable metal tin, which are difficult to deal with in the tin smelting process, accompanied by the risk of environmental pollution, which seriously restricts the sustainable development of the tin smelting industry. In this study, a method was developed for one-step removal of antimony and zinc from TCPM and tin enrichment using anthracite. Under the optimized roasting conditions (roasting temperature 750 °C, 10&#xa0;pct anthracite addition ratio, holding time 3&#xa0;hours, system pressure 10&#xa0;Pa), the removal rate of antimony and zinc reached 93.26 and 98.06&#xa0;pct, respectively. Meanwhile, the antimony and zinc contents in the roasting products were reduced to 0.48 and 0.26&#xa0;pct, respectively. The mechanism is to adjust the phase composition of antimony, zinc and tin in TCPM through anthracite, and reduce SnO<sub>2</sub>, Sb<sub>2</sub>O<sub>5</sub>, NaSb(OH)<sub>6</sub>, Zn<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>, ZnO to Sb<sub>2</sub>O<sub>3</sub>, Zn and Sn in TCPM. Using the differences in volatilization properties of Sb<sub>2</sub>O<sub>3</sub>, Zn and Sn under vacuum conditions, the separation of antimony, zinc and tin was achieved with high efficiency.</p>

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Recovery of Secondary Resources: Highly Efficient Removal of Antimony and Zinc from Tin-Containing Polymetallic Materials

  • 期刊论文

  • 发表日期：

    2025年4月21日

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  • Zhen Yang,
  • Huan Luo,
  • Tengteng Shi,
  • Tongda Deng,
  • Fengkang Wang,
  • Xianjun Lei,
  • Wenlong Jiang,
  • Bin Yang,
  • Baoqiang Xu

摘要

Tin-containing polymetallic materials (TCPM) are typical tin-containing secondary resources generated in the process of recovering tin from zinc smelting system. However, TCPM contain a large amount of antimony, zinc and other impurities in addition to the valuable metal tin, which are difficult to deal with in the tin smelting process, accompanied by the risk of environmental pollution, which seriously restricts the sustainable development of the tin smelting industry. In this study, a method was developed for one-step removal of antimony and zinc from TCPM and tin enrichment using anthracite. Under the optimized roasting conditions (roasting temperature 750 °C, 10 pct anthracite addition ratio, holding time 3 hours, system pressure 10 Pa), the removal rate of antimony and zinc reached 93.26 and 98.06 pct, respectively. Meanwhile, the antimony and zinc contents in the roasting products were reduced to 0.48 and 0.26 pct, respectively. The mechanism is to adjust the phase composition of antimony, zinc and tin in TCPM through anthracite, and reduce SnO2, Sb2O5, NaSb(OH)6, Zn3(AsO4)2, ZnO to Sb2O3, Zn and Sn in TCPM. Using the differences in volatilization properties of Sb2O3, Zn and Sn under vacuum conditions, the separation of antimony, zinc and tin was achieved with high efficiency.