Scholarlink

<p>The development of low-temperature electrolytes and inert anode technology is pivotal for advancing aluminum electrolysis, offering improved energy efficiency, emission mitigation, and process optimization. However, conventional low-temperature electrolytes suffer from limited alumina solubility, and inert anode corrosion kinetics remain unclear. In this study, we investigated the effects of low-temperature electrolyte composition optimization on alumina solubility and metal anode stability. The results demonstrate that the addition of KF within the molar ratio range of 1.0–2.0 in KF-AlF<sub>3</sub> electrolytes effectively reduces the primary crystallization temperature of the molten salt system. Furthermore, both KF incorporation and increased superheat significantly enhance the dissolution kinetics and saturation solubility of alumina. Metal anodes generate a metal oxide layer on the surface during the corrosion process. Compared to Ni and Fe, Cu anodes have a more stable oxide layer and stronger corrosion resistance. The optimized electrolyte enables low-temperature operation with high alumina solubility, demonstrating ideal properties for electrolysis. These findings support advanced electrolyte development and provide a foundation for integrating low-temperature electrolytes with inert anode technologies.</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

Crystallization Temperatures, Alumina Solubilities and Electrolysis with Metal Anodes in Low-Temperature KF-AlF3-Al2O3 Melts

  • 期刊论文

  • 发表日期：

    2025年10月24日

查看全文
  • Yu Hua,
  • Gaosheng Li,
  • Yunze Qiao,
  • Lijun Wei,
  • Guangxin Wu,
  • Yiyang Zhan,
  • Chenyang Shi,
  • Ying-de Huang,
  • Wenjie Yang

摘要

The development of low-temperature electrolytes and inert anode technology is pivotal for advancing aluminum electrolysis, offering improved energy efficiency, emission mitigation, and process optimization. However, conventional low-temperature electrolytes suffer from limited alumina solubility, and inert anode corrosion kinetics remain unclear. In this study, we investigated the effects of low-temperature electrolyte composition optimization on alumina solubility and metal anode stability. The results demonstrate that the addition of KF within the molar ratio range of 1.0–2.0 in KF-AlF3 electrolytes effectively reduces the primary crystallization temperature of the molten salt system. Furthermore, both KF incorporation and increased superheat significantly enhance the dissolution kinetics and saturation solubility of alumina. Metal anodes generate a metal oxide layer on the surface during the corrosion process. Compared to Ni and Fe, Cu anodes have a more stable oxide layer and stronger corrosion resistance. The optimized electrolyte enables low-temperature operation with high alumina solubility, demonstrating ideal properties for electrolysis. These findings support advanced electrolyte development and provide a foundation for integrating low-temperature electrolytes with inert anode technologies.