中文摘要：

聚氯乙烯（polyvinyl chloride,PVC）和废弃液晶显示屏（liquid crystal displays,LCDs）协同热解,可利用PVC产生的氯化氢提取LCDs中的铟,实现废弃PVC塑料和LCDs废物综合利用。通过PVC和LCDs协同热解实验,在PVC热解温度和载气流速一定条件下,采用采用Design-Expert 8.0.5b软件对氯铟比、氯化温度、氯化时间等因素进行实验方案设计和结果分析。结果表明,在其他操作条件一定的前提下,氯铟比、氯化温度、氯化时间对铟回收率的影响均为显著;通过分析实验结果并建立数学模型,最终得到实际可操作的最佳实验条件,其结果为氯化温度为500℃、氯化时间为30 min和氯铟比为11∶1,铟回收率为97.50%。本研究对于废弃PVC塑料和LCDs的资源化综合利用具有重要的参考价值。

英文摘要：

Hydrogen chloride generated via polyvinyl chloride （PVC） pyrolysis could be used to recover indium from waste liquid crystal displays （LCDs） via chloridizing metallurgy processes, which in turn achieve the comprehensive utilization of the waste PVC plastic and LCDs.Design-Expert 8.0.5b was used to design and analyze the results of experiments to obtain the optimal indium recovery with a constant PVC pyrolysis temperature and carrier gas flow rate and varying Cl/In ratio, chlorination temperature, and chlorination time.The results indicate that these three factors exert significant influences on the recovery of indium.The indium recovery of each experiment was analyzed, and a mathematical model was established.Indium recovery could reach 97.50% at the optimal actual operating conditions, i.e., chlorination temperature of 500℃, chlorination time of 30 min, and Cl/In value of 11：1.The present study may provide important guidance for the recycling and comprehensive utilization of waste PVC plastic and LCDs.