Scholarlink

<p>The disposal of lithium-rich waste barrier material from aluminum electrolysis presents significant safety and economic challenges. Notably, the release of hydrogen fluoride gas during acid leaching, the intricate separation of lithium from aluminum, and filtration issues due to silicon–aluminum gels in the residue are critical concerns. Therefore, a novel method involving water leaching, calcification roasting, and secondary water leaching is proposed. This technique employs calcium fluoride and calcium–aluminum–silicon slag to immobilize fluorine, aluminum, and silicon while selectively extracting lithium. Systematic evaluations of the distribution and safe utilization of lithium, sodium, aluminum, silicon, fluorine, and cyanides within the waste barrier material were conducted. Additionally, the chemical composition, phase composition, and microstructural changes during the calcium roasting process were examined. Consequently, this research establishes a theoretical framework for the safe dissociation of cyanides and the immobilization of fluorides and aluminum-silicon components, providing a robust foundation for the effective treatment and high-value utilization of waste barrier material.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Selective Leaching of Lithium by Immobilization of Aluminum, Silicon, and Fluorine Via Calcium Roasting of Waste Barrier Material

  • 期刊论文

  • 发表日期：

    2026年3月30日

查看全文
  • Yuting Chen,
  • Jun Yan,
  • Weiping Liu,
  • Wei Sun,
  • Shafiq Alam

摘要

The disposal of lithium-rich waste barrier material from aluminum electrolysis presents significant safety and economic challenges. Notably, the release of hydrogen fluoride gas during acid leaching, the intricate separation of lithium from aluminum, and filtration issues due to silicon–aluminum gels in the residue are critical concerns. Therefore, a novel method involving water leaching, calcification roasting, and secondary water leaching is proposed. This technique employs calcium fluoride and calcium–aluminum–silicon slag to immobilize fluorine, aluminum, and silicon while selectively extracting lithium. Systematic evaluations of the distribution and safe utilization of lithium, sodium, aluminum, silicon, fluorine, and cyanides within the waste barrier material were conducted. Additionally, the chemical composition, phase composition, and microstructural changes during the calcium roasting process were examined. Consequently, this research establishes a theoretical framework for the safe dissociation of cyanides and the immobilization of fluorides and aluminum-silicon components, providing a robust foundation for the effective treatment and high-value utilization of waste barrier material.