Department of System Innovation, Graduate School of Engineering, The University of Tokyo, Japan.
Waste Manag. 2012 Oct;32(10):1937-44. doi: 10.1016/j.wasman.2012.05.016. Epub 2012 Jun 6.
In order to develop an effective recycling system for obsolete Liquid Crystal Displays (LCDs), which would enable both the leaching of indium (In) and the recovery of a pure glass fraction for recycling, an effective liberation or size-reduction method would be an important pre-treatment step. Therefore, in this study, two different types of liberation methods: (1) conventional grinding, and (2) electrical disintegration have been tested and evaluated in the context of Life Cycle Assessment (LCA). In other words, the above-mentioned methods were compared in order to find out the one that ensures the highest leaching capacity for indium, as well as the lowest environmental burden. One of the main findings of this study was that the electrical disintegration was the most effective liberation method, since it fully liberated the indium containing-layer, ensuring a leaching capacity of 968.5mg-In/kg-LCD. In turn, the estimate for the environmental burden was approximately five times smaller when compared with the conventional grinding.
为了开发一种有效的废弃液晶显示器（LCD）回收系统，既能浸出铟（In），又能回收用于回收的纯净玻璃碎片，有效的解放或减小粒径的方法将是一个重要的预处理步骤。因此，在这项研究中，两种不同类型的解放方法：（1）常规研磨和（2）电分离，在生命周期评估（LCA）的背景下进行了测试和评估。换句话说，比较了上述方法，以找出一种方法，既能确保最高的铟浸出能力，又能将环境负担降到最低。本研究的主要发现之一是，电分离是最有效的解放方法，因为它完全解放了含铟层，确保了 968.5mg-In/kg-LCD 的浸出能力。相比之下，当与常规研磨相比时，环境负担的估计值大约小了五倍。
