Scholarlink

<p>Focusing on the efficient and sustainable utilization of strategic rare metal beryllium, a novel method for direct extraction of metallic beryllium <i>via</i> electrolysis of BeO in molten LiF–NaF salts is proposed in this study. Based on the thermodynamic evaluation on the electrolytic process, the redox behaviors of Be<sup>2+</sup> and BeO in molten fluorides were systematically studied by employing multiple electrochemical techniques. It is found that the reduction of Be<sup>2+</sup> on nickel is a reversible, single-step process controlled by diffusion. According to the redox potentials obtained from electrochemical measurements, constant voltage electrolysis was performed at 3.3 V to ascertain the feasibility of directly extracting beryllium metal from BeO. After electrolysis in molten LiF–BeF<sub>2</sub>–BeO system for 5.5 hours, scaly beryllium metals were stripped from cathode and beryllium beads were finally obtained after remelting. The results of XRD, SEM, and ICP-OES analyses indicate that the electrolysis products are pure beryllium metal with the purity up to 99.57 pct. This work affords a theoretical and technical foundation for efficient extraction of high-purity beryllium metal through direct electrolysis of BeO in molten fluorides.</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

Electrochemical Behavior of Be2+ for Direct Extraction of High-Purity Beryllium from BeO by Electrolysis in Molten LiF–BeF2

  • 期刊论文

  • 发表日期：

    2025年4月11日

查看全文
  • Zheng Zeng,
  • Xianjun Chen,
  • Hongmeng Weng,
  • Chenxue Wang,
  • Naweikeran Sailimu,
  • Zhongsheng Hua

摘要

Focusing on the efficient and sustainable utilization of strategic rare metal beryllium, a novel method for direct extraction of metallic beryllium via electrolysis of BeO in molten LiF–NaF salts is proposed in this study. Based on the thermodynamic evaluation on the electrolytic process, the redox behaviors of Be2+ and BeO in molten fluorides were systematically studied by employing multiple electrochemical techniques. It is found that the reduction of Be2+ on nickel is a reversible, single-step process controlled by diffusion. According to the redox potentials obtained from electrochemical measurements, constant voltage electrolysis was performed at 3.3 V to ascertain the feasibility of directly extracting beryllium metal from BeO. After electrolysis in molten LiF–BeF2–BeO system for 5.5 hours, scaly beryllium metals were stripped from cathode and beryllium beads were finally obtained after remelting. The results of XRD, SEM, and ICP-OES analyses indicate that the electrolysis products are pure beryllium metal with the purity up to 99.57 pct. This work affords a theoretical and technical foundation for efficient extraction of high-purity beryllium metal through direct electrolysis of BeO in molten fluorides.