机械活化强化废弃荧光粉中稀土金属的回收  

Rare Earth Metals Recovery from Scrap Fluorescent Powder by Mechanical Activation

作　　者：苑文仪[1] 孟雯[2] 王晓岩[2] 陈钦[1] 王景伟[1] 

机构地区：[1]上海第二工业大学上海电子废弃物资源化产学研合作开发中心,上海201209 [2]上海第二工业大学环境与材料工程学院,上海201209

出　　处：《上海第二工业大学学报》2015年第1期1-6,共6页Journal of Shanghai Polytechnic University

基　　金：上海第二工业大学科研启动基金(No.EGD14XQD06);国家自然科学基金(No.21407105);上海市自然科学基金(No.14ZR1416700);上海高校知识服务平台项目(No.ZF1224)资助

摘　　要：根据废弃荧光粉的矿物特性,采用机械活化方式对其进行预处理,考察了机械球磨转速、球磨时间对荧光粉物理化学性质的影响,并对活化后样品在硫酸溶液中的浸出行为进行研究分析。研究结果表明,废弃荧光粉经过机械活化处理后,结构由颗粒状变成无定形云絮状,比表面积相应增加,且由晶态向非晶态转化,内能增加,浸出反应活性增强。在最优机械活化和浸出条件下,废弃荧光粉中稀土金属La和Y的浸出率分别达到83.1%和99.1%。In the research, mechanical activation was used to pre-treat scrap fluorescent powder according to its characterization. Effect of rotational speed and mechanical activation duration on the properties of scrap fluorescent powder and leaching behavior of mechanically-activated samples in sulfate solution were investigated. The results show that after mechanical activation, the fluorescent powder is very fine with the surface cotton-like. It induces its transferring into amorphous structure, increase in specific surface area and inner energy and reaction activity. At the optimal mechanical activation and leaching conditions, leaching rates of La and Y from scrap fluorescent powder are 83.1 % and 99.1 %, respectively.

关 键 词：废弃荧光粉 稀土金属 机械活化 酸浸 

分 类 号：X76[环境科学与工程—环境工程]