Cai Yuanyuan, Nie Zuoren, Ma Liwen, Xi Xiaoli
Collaborative Innovation Center of Capital Resource-Recycling Material Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China.
Collaborative Innovation Center of Capital Resource-Recycling Material Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China; Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100124, China; National Engineering Laboratory for Industrial Big-data Application Technology, Beijing University of Technology, Beijing, 100124, China.
J Environ Manage. 2023 Dec 15;348:119270. doi: 10.1016/j.jenvman.2023.119270. Epub 2023 Oct 16.
As metal additive manufacturing (MAM) technology is booming in the aerospace sector, alternatives to the traditional production methods of metals such as mining, processing, and refining with severe emissions are urgently needed. This study proposed a closed-loop route for efficient recovery of molybdenum (Mo) and value-added reuse of tungsten (W) from Cr-Co-Ni-Mo-W alloy waste in MAM. The results showed that the leaching efficiency of Mo and W reached 99.3% and 99.9%, respectively, using the dual chemical-physical means of mixed-alkali roasting and leaching by microwave heating, while the discharge of waste liquor containing Cr was reduced. Leaching kinetic studies revealed that the metal leaching process was controlled by chemical reaction mechanism. Moreover, the 10%N1923 (primary amine)-5%TRPO (tri-alkyl phosphine oxide)-kerosene extraction system exhibited a synergistic extraction effect on Mo and W. After purification, Mo was recovered as Mo powder for MAM. Simultaneously, the recovered product of W, MnWO, was applied as a photocatalytic material with excellent degradation of methylene blue dye. Ultimately, the proposed method obtained recovery efficiencies of 98.4% and 99.3% for Mo and W, respectively, achieving efficient and environmentally-friendly reuse of these key metals.
随着金属增材制造（MAM）技术在航空航天领域蓬勃发展，迫切需要替代传统金属生产方法（如采矿、加工和精炼，这些过程会产生大量排放）。本研究提出了一种闭环路线，用于从MAM中的Cr-Co-Ni-Mo-W合金废料中高效回收钼（Mo）并对钨（W）进行增值再利用。结果表明，采用混合碱焙烧和微波加热浸出的双化学物理手段，Mo和W的浸出效率分别达到99.3%和99.9%，同时减少了含Cr废液的排放。浸出动力学研究表明，金属浸出过程受化学反应机理控制。此外，10%N1923（伯胺）-5%TRPO（三烷基氧化膦）-煤油萃取体系对Mo和W表现出协同萃取效果。经过提纯后，Mo被回收为用于MAM的Mo粉。同时，回收得到的W产物MnWO被用作光催化材料，对亚甲基蓝染料具有优异的降解性能。最终，所提出的方法对Mo和W的回收效率分别达到98.4%和99.3%，实现了这些关键金属的高效和环保再利用。
