Cui Jirang, Forssberg Eric
Division of Mineral Processing, Luleå University of Technology, SE-971 87 Luleå, Sweden.
Waste Manag. 2007;27(3):415-24. doi: 10.1016/j.wasman.2006.02.003. Epub 2006 Apr 19.
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.
通过多种方法对电视废料进行了表征，如化学分析、粒度和形状分析、解离度分析、热重分析、浮沉试验和红外光谱分析。电视废料、个人电脑废料和印刷电路板废料的比较表明，电视废料中有色金属和贵金属的含量远低于个人电脑废料或印刷电路板废料。预计通过传统的手工拆解回收电视废料将不具有成本效益。颗粒形状分析结果表明，电视废料中的有色金属颗粒形成了多种形状；它比塑料和印刷电路板的颗粒更加不均匀。此外，通过浮沉试验评估了基于密度技术对电视废料的可分离性。结果表明，通过有效的重力分离过程可以获得较高的铜回收率。对塑料的鉴定表明，电视废料中的主要塑料是高抗冲聚苯乙烯。由于比重变化，塑料的重力分离在从电视废料中分离塑料时可能会遇到一些挑战。
