电子废物资源化循环转化过程与代谢规律研究

选择废印刷电路板和废CRT玻壳玻璃的资源化过程作为承载实体,进行了研究分析.建立了电子废物资源化技术过程的物质能量转化模型;分析了废印刷电路板和废CRT玻壳玻璃的资源化过程中的物质流、能量流、废物流以及污染物的释放与迁移;核算了物质、能量转化清单.分析结果表明,废印刷电路板资源化过程中的分选环节能耗较高,达100kW×h/t,而拆解和非金属材料的热压成型是控制污染物排放的重点环节;废CRT玻壳玻璃资源化过程中屏玻璃和锥玻璃的再利用环节能耗较高,利用屏玻璃制造泡沫玻璃和锥玻璃冶炼铅的能耗分别为600, 250kW×h/t,破碎、研磨、锥玻璃冶炼铅是控制污染物排放的重点环节.

Recycling process and metabolic rule of electronic waste

Recycling processes of waste printed circuit board (PCB) and waste cathode ray tube (CRT) were selected as research projects. The material and energy conversion model of electronic waste recycling process was established; the material flow, energy flow, waste flow and the pollutant release and transfer were analyzed; the material, energy conversion list was calculated. The energy consumption of sorting reached to 100kW×h/t, and the dismantling and the hot pressing of non-metallic materials were the key links of the emission of pollutants in the recycling process of waste printed circuit board. Energy consumption in the reuse of panel glass and funnel glass were higher than other stages, the energy consumption of preparing foam glass and smelting lead were 600 and 250kW×h/t repectively, the crushing, grinding and the smelting of lead from funnel glass were key links of the emission of pollutants in the recycling process of cathode ray tube.