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<p>Beryllium (Be) is mainly produced by magnesiothermic reduction of beryllium fluoride (BeF<sub>2</sub>), a process which exhibits problems of a low Be extraction rate (<i>R</i><sub>Be</sub>) and low Be purity. This study investigates the reaction mechanism of magnesiothermic reduction of BeF<sub>2</sub> and proposes the addition of CaCl<sub>2</sub> for synergistic smelting reduction, with a view to improving the extraction rate and purity of Be. The results of TG-DTA indicate that the addition of CaCl<sub>2</sub> can effectively suppress the intensity of the magnesiothermic reduction reaction of BeF<sub>2</sub>. The mass loss of the material during reduction decreased from 3.09 wt&#xa0;pct (without CaCl<sub>2</sub> addition) to 0.82 wt&#xa0;pct (with CaCl<sub>2</sub> addition), demonstrating that the addition of CaCl<sub>2</sub> is capable of reducing the volatilisation loss and improve the extraction rate of Be. The magnesiothermic reduction of BeF<sub>2</sub> with CaCl<sub>2</sub> addition results in an increased extraction rate of 93.3 wt&#xa0;pct for Be. Furthermore, the addition of CaCl<sub>2</sub> led to a reduction in the melting point of the slag, enhanced its fluidity, and reduced the impurity content in the Be beads, resulting in a purity of 99.4 wt&#xa0;pct for Be. This study successfully overcomes the technical challenges associated with the low extraction rate and purity of BeF<sub>2</sub> by magnesiothermic reduction, which is beneficial for enhancing the production efficiency of Be on an industrial scale.</p> Graphical Abstract <p></p>

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Enhanced Magnesiothermic Reduction of Beryllium Fluoride with CaCl2 Addition for Beryllium Production

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Chao Wang,
  • Dawei Yu,
  • Xueyi Guo,
  • Zean Wang,
  • Yaqi Xie,
  • Qinghua Tian

摘要

Beryllium (Be) is mainly produced by magnesiothermic reduction of beryllium fluoride (BeF2), a process which exhibits problems of a low Be extraction rate (RBe) and low Be purity. This study investigates the reaction mechanism of magnesiothermic reduction of BeF2 and proposes the addition of CaCl2 for synergistic smelting reduction, with a view to improving the extraction rate and purity of Be. The results of TG-DTA indicate that the addition of CaCl2 can effectively suppress the intensity of the magnesiothermic reduction reaction of BeF2. The mass loss of the material during reduction decreased from 3.09 wt pct (without CaCl2 addition) to 0.82 wt pct (with CaCl2 addition), demonstrating that the addition of CaCl2 is capable of reducing the volatilisation loss and improve the extraction rate of Be. The magnesiothermic reduction of BeF2 with CaCl2 addition results in an increased extraction rate of 93.3 wt pct for Be. Furthermore, the addition of CaCl2 led to a reduction in the melting point of the slag, enhanced its fluidity, and reduced the impurity content in the Be beads, resulting in a purity of 99.4 wt pct for Be. This study successfully overcomes the technical challenges associated with the low extraction rate and purity of BeF2 by magnesiothermic reduction, which is beneficial for enhancing the production efficiency of Be on an industrial scale.

Graphical Abstract