Environment-Friendly Technology of Recovering Full Resources of Waste Capacitors
Environment-Friendly Technology of Recovering Full Resources of Waste Capacitors
复制标题
废旧电容器全资源化环保技术
DOI：
10.1021/acssuschemeng.6b01569
复制
发表时间：
2017-01
影响因子：
8.4
通讯作者：
Rongliang Qiu
中科院分区：
文献类型：
--
作者：
Jujun Ruan;Jie Zheng;Lipeng Dong;Rongliang Qiu
随着电子垃圾的产生，世界上沿着产生了大量的废弃印刷电路板（PCB）。在废弃的多氯联苯中含有高纯度的金属。我国废弃多氯联苯的回收造成了严重的环境污染。从环境保护的角度出发，提出了从废弃PCB基板中回收资源的新技术。除了基板外，废弃PCB还含有许多电子元件。然而，几乎没有关于电子部件回收技术的报告。提出了一种环境友好的废电容器回收工艺。通过粉碎释放包含废电容器的材料。然后，黑色金属（镍合金）和有色金属（铝）从破碎的废电容器分离的磁/涡流分离。镍合金颗粒和铝颗粒可以被送到冶炼厂。磁涡流分选的最佳操作参数为进料速度为0.5 m/s，磁场转速为4.0 m/s。采用真空热解法将废旧电容器中的非金属材料转化为沸点<100 °C的油。原油富含烷烃、Si-CH 3基团和C-Cl基团，需要进行精制以获得纯有机产品。本研究为废弃PCB中电子元器件的处理提供了一种环境友好的技术。
High quantities of waste printed circuit boards (PCBs) have been produced along with the generation of e-waste in the world. High purity metals were contained in waste PCBs. Recovery of waste PCBs caused serious pollution in China. With the view of environment protection, new technologies have been proposed to recover resources from basal boards of waste PCBs. Besides basal boards, waste PCBs contain many electronic components. However, little recovery technology was reported for electronic components. An environmental-friendly technology was proposed to recover waste capacitors of waste PCBs. The materials comprising waste capacitors were liberated by crushing. Then, ferrous metals (nickel alloy) and nonferrous metals (aluminum) were separated from crushed waste capacitors by magnetic/eddy current separation. Nickel alloy particles and aluminum particles can be sent to smelting plants. The optimized operation parameters of magnetic/eddy current separation were fed at speeds of 0.5 m/s, and the rotation speed of the magnetic field was 4.0 m/s. Nonmetallic materials of waste capacitors were translated to oils (boiling points <100 °C) by the method of vacuum pyrolysis. The oils were enriched in alkane, Si-CH3groups, and C–Cl groups and needed to be refined for purity organic products. This study contributed an environmental-friendly technology to treat electronic components of waste PCBs.
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