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首页> 外文期刊>Environmental Science & Technology >Application of Vacuum Metallurgy to Separate Pure Metal from Mixed Metallic Particles of Crushed Waste Printed Circuit Board Scraps
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Application of Vacuum Metallurgy to Separate Pure Metal from Mixed Metallic Particles of Crushed Waste Printed Circuit Board Scraps

机译：真空冶金技术从粉碎的废印刷电路板废料的混合金属颗粒中分离纯金属

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摘要

The principle of separating pure metal from mixed metallic particles (MMPs) by vacuum metallurgy is that the vapor pressures of various metals at the same temperature are different. As a result, the metal with high vapor pressure and low boiling point can be separated from the mixed metals through distillation or sublimation, and then it can be recycled through condensation under a certain condition. The vacuum metallurgy separation (VMS) of MMPs of crushed waste printed circuit boards (WPCBs) has been studied in this paper. Theoretical analyses show that the MMPs (copper, zinc, bismuth, lead, and indium, for example) can be separated by vacuum metallurgy. The copper particles (0.15-0.20 mm) and zinc particles (< 0.30 mm) were chosen to simulate the MMPs of crushed WPCBs. Experimental results show that the separated efficiency of zinc in the copper-rich particles achieves 96.19 wt % when the vacuum pressure is 0.01 -0.10 Pa, the heating temperature is 1123 K, and the heating time is 105 min. Under this operation condition, the separated efficiency of zinc in the copper-rich particles from crushed WPCBs achieves 97.00 wt % and the copper purity increases from 90.68 to 99.84 wt %.
机译：通过真空冶金从混合金属颗粒（MMP）中分离纯金属的原理是，在相同温度下各种金属的蒸汽压是不同的。结果，可以通过蒸馏或升华将高蒸气压和低沸点的金属与混合金属分离，然后可以在一定条件下通过缩合将其再循环。本文研究了压碎废印刷电路板（WPCB）的MMP的真空冶金分离（VMS）。理论分析表明，MMP（例如铜，锌，铋，铅和铟）可以通过真空冶金分离。选择铜颗粒（0.15-0.20毫米）和锌颗粒（<0.30毫米）来模拟压碎的WPCB的MMP。实验结果表明，在真空压力为0.01 -0.10 Pa，加热温度为1123 K，加热时间为105 min的条件下，富铜颗粒中锌的分离效率达到96.19 wt％。在此操作条件下，从压碎的WPCB中分离出的富铜颗粒中锌的分离效率达到97.00 wt％，铜纯度从90.68 wt。％增加到99.84 wt％。

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  • 来源
    《Environmental Science & Technology》 |2008年第20期|7676-7681|共6页
  • 作者

    LU ZHAN; ZHENMING XU;

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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