摘要
通过碳热还原强化酸浸的方法高效去除CRT锥玻璃中的重金属铅,同时将脱铅残渣转变为玻璃微珠产品。实验考察了还原温度、碳粉加入量和保温时间对锥玻璃中铅浸出效果的影响。研究结果表明,经碳热还原预处理后锥玻璃中的氧化铅转变为单质铅并主要富集在玻璃微珠表面,通过酸浸处理可高效回收锥玻璃中的铅。当锥玻璃与10%碳粉混合均匀,在1 200℃条件下处理30 min,锥玻璃中铅的浸出效率可达94.80%,脱铅残渣为粒径范围1~15μm的玻璃微珠。
In this paper,Pb O in funnel glass was efficiently removed by acid leaching enhanced by carbon thermal reduction and the residue was prepared into glass microspheres synchronously. The influencing factors included the reduction temperature,amount of carbon added,and the holding time. The results indicated that Pb O in the funnel glass can be quickly reduced to metallic Pb and were mainly located on the surface of the glass microspheres. Therefore,the generated Pb can be efficiently removed by acid leaching. The leaching rate of Pb was 94. 80% when the temperature,added carbon amount,and holding time were fixed at 1 200 ℃,10% and30 min,respectively. Spherical glass microspheres of 1 to 15 μm were obtained after the acid leaching treatment.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第12期7271-7276,共6页
Chinese Journal of Environmental Engineering
基金
河南省高校矿山环境保护与生态修复省级重点实验室培育基地开放基金资助(KF2014-02)
河南省教育厅科学技术研究重点项目基础研究(13140055)
河南理工大学博士基金(B2014-073)
关键词
电子废弃物
重金属
碳热还原
酸浸
含铅玻璃
waste electrical and electronic equipments
heavy metals
carbon thermal reduction
acid leaching
lead glass
