Yellow phosphorus flue dust (YPFD) is a kind of solid waste generated from yellow phosphorus production. Because it contains approximately 0.05 % of gallium (Ga), the recovery of Ga from YPFD has attracted the interest of many researchers. To reduce environmental pollution and storage problems associated with YPFD, a new vacuum thermal reduction method to recover Ga from YPFD was proposed in this study. Thermodynamic calculations and thermogravimetric analysis were first used to determine the initial reaction temperature between Ga₂O₃ and C. High-purity Ga₂O₃ and activated carbon were evenly mixed and heated at 1273 K and 10 Pa for 2 h. Experimental results showed that metallic Ga could be obtained in the condensation zone by vacuum carbothermal reduction. Based on this result, we next attempted to recover Ga from YPFD by vacuum carbothermal reduction. YPFD containing 30wt% carbon was heated at 1273 K and 10 Pa for 2 h, and the experimental results also yielded Ga enrichment in the condensation zone. Therefore, this study provides a new and potential useful technology for recovery of Ga from YPFD, as well as a certain practical approach to comprehensively utilizing such industrial waste.

黄磷烟尘（YPFD）是一种由黄磷生产产生的固体废物。由于它包含约0.05％的镓（Ga），因此从YPFD中回收Ga吸引了许多研究人员的兴趣。为了减少YPFD带来的环境污染和存储问题，本研究提出了一种从YPFD中回收Ga的新型真空热还原法。首先使用热力学计算和热重分析来确定Ga ₂ O ₃和C之间的初始反应温度。高纯度Ga ₂ O ₃将其与活性炭均匀混合并在1273 K和10 Pa下加热2 h。实验结果表明，通过真空碳热还原可以在缩合区获得金属Ga。基于此结果，我们接下来尝试通过真空碳热还原从YPFD中回收Ga。将含有30wt％碳的YPFD在1273 K和10 Pa下加热2 h，实验结果还表明在冷凝区中Ga富集。因此，本研究为从YPFD中回收Ga提供了一种新的，潜在的有用技术，并且为综合利用此类工业废物提供了一定的实用方法。