废旧线路板非金属组分中玻璃纤维的脱除研究
Removal of Glass Fibers from Nonmetallic Fractions of Waste Printed Circuit Boards
投稿时间:2017-11-16  修订日期:2017-11-16
DOI:
中文关键词:  废弃线路板  非金属组分  摩擦电选  玻璃纤维  资源化
英文关键词:Waste printed circuit boards  Nonmetallic fractions  Triboelectric separation  Glass fibers, Recycling
基金项目:感谢国家自然基金面上项目(51574234,51674257)资助,感谢国家青年基金项目(51404267)资助,感谢江苏省自然科学基金青年基金项目(BK20160267)资助,感谢上海电子废弃物资源化协同创新中心(ZF1224)资助,感谢中国矿业大学现代分析与计算中心提供技术支持
作者单位E-mail
冯驿 中国矿业大学化工学院 yqhe_cumt@126.com 
何亚群 中国矿业大学 化工学院 yqhe@cumt.edu.cn 
王海锋   
张涛   
张光文   
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中文摘要:
      废弃线路板非金属组分中玻璃纤维会影响其回收再利用效率。为改善此现状,本研究利用实验室摩擦静电分选系统探究从非金属组分中脱除玻璃纤维的可行性。用X射线荧光光谱仪(XRF)和扫描电子显微镜(SEM)对非金属组分及其分选产品进行分析。结果表明废弃线路板非金属组分中含有大量的玻璃纤维,且其主要元素为铝、硅、钙。无机组分与有机组分具有明显的荷电差异,这为摩擦电选分离出玻璃纤维提供了理论基础。在摩擦电选试验中玻璃纤维荷正电,富集在负极产品中,而塑料颗粒荷负电,富集在正极产品中。XRF和SEM结果表明摩擦电选可以有效地从废弃电路板非金属组分中脱除玻璃纤维。
英文摘要:
      The recycling efficiency of nonmetallic fraction from waste printed circuit boards was affected by the presence of glass fibers. In order to improve the status quo, the feasibility of removing glass fibers from non-metallic fractions was investigated using a laboratory triboelectric separation system. Mineralogical characteristics of nonmetallic fractions and the separation products were analyzed by X-ray fluorescence (XRF) and scanning electron microscope (SEM). Results demonstrate that large amounts of glass fibers remain in nonmetallic fractions, and their main elements are Al, Si, and Ca. There are obvious differences in tribocharge characteristics between inorganic fractions and organic fractions, which provides a theoretical basis for the removal of glass fibers by triboelectric separation. In the experiments, glass fibers tribocharge positively and are concentrated in negative product, while plastic particles tribocharge negatively and are concentrated in positive product. The XRF and SEM results demonstrate that triboelectric separation can remove glass fibers from nonmetallic fractions efficiently.
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