Ji Wentao, Xie Keqiang, Yan Shiyu, Huang Haiyi, Chen Haolin
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China; National Engineering Laboratory for Vacuum Metallurgy, Kunming 650093, Yunnan, China.
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China; National Engineering Laboratory for Vacuum Metallurgy, Kunming 650093, Yunnan, China.
J Hazard Mater. 2020 Dec 5;400:123234. doi: 10.1016/j.jhazmat.2020.123234. Epub 2020 Jun 17.
Gallium is widely used in the field of semiconductors, and is mainly recovered as a by-product from other production processes utilizing metals such as aluminum and zinc. As a waste generated during the production of yellow phosphorus, yellow phosphorus flue dust is a potential resource for recovery of gallium. In this study, vacuum carbothermic reduction technology was applied to extract gallium from yellow phosphorus flue dust. Under the optimal conditions of 1323 K, 40 min holding time, 50 wt% carbon content, and 1-10 Pa, the recovery rate of gallium was 92.5 %. The condensate was analyzed and the enrichment area of gallium in the condensation zone was determined. No hazardous gases and materials were generated during the process. Compared with other methods of recovering gallium from yellow phosphorus flue dust by hydrometallurgical process, this study has the advantages of short process, easy collection of products, low energy consumption. Overall, this work demonstrates a new and environmentally friendly method for the recovery of gallium from yellow phosphorus flue dust, and also provides a reference value for the comprehensive utilization of this material.
镓在半导体领域有广泛应用，主要作为利用铝和锌等金属的其他生产过程的副产品回收。作为黄磷生产过程中产生的废弃物，黄磷烟尘是回收镓的潜在资源。本研究采用真空碳热还原技术从黄磷烟尘中提取镓。在1323 K、保温时间40分钟、碳含量50 wt%、压力1 - 10 Pa的最佳条件下，镓的回收率为92.5%。对冷凝物进行了分析，并确定了冷凝区镓的富集区域。该过程未产生有害气体和物质。与通过湿法冶金工艺从黄磷烟尘中回收镓的其他方法相比，本研究具有流程短、产品易收集、能耗低的优点。总体而言，这项工作展示了一种从黄磷烟尘中回收镓的新型环保方法，也为该材料的综合利用提供了参考价值。
