摘要
阐述了废弃荧光灯回收利用的潜在意义,介绍了国内外废弃荧光灯资源回收与处置方法。采用回收利用法处理废弃荧光灯,其中包括荧光灯的破碎与物理分离,汞的无害化处理,以及稀土三基色荧光粉的回收和分离。根据稀土三基色荧光粉的特点,目前国外主要采用超临界CO2萃取法、湿法冶金法、风力分选法、离心法和浮选法分离回收稀土,对循环利用稀土资源具有一定的意义。
This paper formulates the latent significance of recycling and reusing spent fluorescent lamps,introduces some methods of recovering and disposing spent fluorescennt lamps home and abroad.The method of recycling and reusing spent fluorescent lamps includs three steps：smashing and physicaly saperating ; harmless disposal of mercury ; recovering and saperating tri-chromatic rare earth fluorescent powder. According to the characteristics of tri-chromatic rare earth fluorescent powder, at present overseas mainly uses the methods of supercritical CO2 extraction,hydrometallurgy,pneumatic separation,centrifugation and floatability for separating and recoving earth resource circulation using. rare earth.This has the certain significance to the rare earth resource circulation using.
基金
教育部留学回国人员科研启动基金资助项目(教外司留[2005]383号)
关键词
废弃荧光灯
资源回收
汞
稀土三基色荧光粉
Spent fluorescent lamps
Reutilization
Mercury
Tri-chromatic Rare Earth Fluorescent Powder
