Characterization of shredded television scrap and implications for materials recovery
Characterization of shredded television scrap and implications for materials recovery
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DOI：
10.1016/j.wasman.2006.02.003
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发表时间：
2007-01-01
期刊：
影响因子：
8.1
通讯作者：
Forssberg, Eric
中科院分区：
文献类型：
--
作者：
Cui, Jirang;Forssberg, Eric
采用化学分析、粒度和形状分析、解离度分析、热重分析、沉浮试验、红外光谱等多种方法对电视废料进行了表征。通过对废旧电视、废旧个人电脑和废旧印刷电路板的比较发现，废旧电视中有色金属和贵金属的含量远远低于废旧个人电脑和废旧印刷电路板中的含量。预计利用传统的人工拆卸回收电视废料将不具有成本效益。颗粒形态分析结果表明，电视废渣中有色金属颗粒形态多样；它比塑料和印刷电路板更不均匀。此外，利用基于密度的技术，通过沉-浮试验对电视废料的可分离性进行了评价。结果表明，采用有效的重选工艺可以获得较高的铜回收率。塑料的鉴定表明，电视废料中的主要塑料是高冲击聚苯乙烯。由于塑料的密度存在一定的差异，塑料的重力分离在分离电视废塑料时可能会遇到一些挑战。(c) 2006 Elsevier Ltd.版权所有。
Characterization of TV scrap was carried out by using a variety of methods, such as chemical analysis, particle size and shape analysis, liberation degree analysis, thermogravimetric analysis, sink-float test, and IR spectrometry. A comparison of TV scrap, personal computer scrap, and printed circuit board scrap shows that the content of non-ferrous metals and precious metals in TV scrap is much lower than that in personal computer scrap or printed circuit board scrap. It is expected that recycling of TV scrap will not be cost-effective by utilizing conventional manual disassembly. The result of particle shape analysis indicates that the non-ferrous metal particles in TV scrap formed as a variety of shapes; it is much more heterogeneous than that of plastics and printed circuit boards. Furthermore, the separability of TV scrap using density-based techniques was evaluated by the sink-float test. The result demonstrates that a high recovery of copper could be obtained by using an effective gravity separation process. Identification of plastics shows that the major plastic in TV scrap is high impact polystyrene. Gravity separation of plastics may encounter some challenges in separation of plastics from TV scrap because of specific density variations. (c) 2006 Elsevier Ltd. All rights reserved.