| 초록 |
Liquid crystal displays (LCD) have become main-stream of the flat panel displays for notebook computers, desktop computer monitors and televisions. More than 4 million sets of flat panel displays will be discarded by 2020 if expected lifespan of 10 years assumed. If the waste flat panel displays are not properly managed, they will have significantly adverse impacts on ecosphere and human health along with significant loss of valuable resources such as plastics, glass, ferrous and nonferrous metals, rare earth and rare metals. Therefore, a comprehensive recycling technology was developed for efficient and environmentally sound recovery of valuable materials from wastes. The overall aim of this project was to demonstrate a technically and commercially viable recycling process for flat panel displays based on existing available technology and treatment techniques. Three key technologies include manual disassembly, sorting and separation of plastic case and metal frame, removal of harmful substances such as liquid crystal and mercury in cold cathode fluorescent lamps, and chemical recovery of indium from ITO electrodes of LCD panels. The mainly recovered material fractions were ferrous and non-ferrous metals, printed circuit boards, plastics and glass with liquid crystal section and thin film sheets. |
