铝电解废阴极-赤泥协同处置回收铁实验研究  

Study on Co-processing and Iron Recovery from Aluminum Electrolysis Spent Cathode Carbon and Red Mud

作　　者：刘遇萍 陈王莹 杨秀龙 龙海 Liu Yuping;Chen Wangying;Yang Xiulong;Long Hai(School of Chemistry and Materials Engineering,Liupanshui Normal University,Liupanshui 553004,China)

机构地区：[1]六盘水师范学院化学与材料工程学院,贵州六盘水553004

出　　处：《云南化工》2024年第3期28-32,共5页Yunnan Chemical Technology

基　　金：大学生创新创业训练计划(S202210977062);六盘水市科技计划项目(52020-2022-PT-04)。

摘　　要：铝电解废阴极和赤泥是铝冶炼生产过程中不可避免的大宗危险固体废弃物,对生态环境存在威胁,但也具有极大的回收潜能。通过短流程一步还原法,以废阴极中碳为还原剂,将赤泥中铁还原为可磁选的单质铁或四氧化三铁,实现“双废”协同处置。研究表明:在温度600℃、时间300 min、m(废阴极)/m(赤泥)=0.75∶1条件下,铁回收率为60.02%。Aluminum electrolysis spent cathode carbon and red mud are inevitable large hazardous solid in aluminum industry,which poses a threat to the ecological environment,but also great recycling potential.A short process one-step reduction method was proposed.Carbon in the spent cathode was used as reductant to reduce iron in red mud to magnetically separable elemental iron or ferric oxide,achieving a“dual waste”collaborative disposal.The results showed that under conditions of 600℃,300 minutes,and ration of spent cathode to red mud is 0.75∶[KG-3/5]1,the iron recovery rate was 60.02%.

关 键 词：铝电解废阴极 赤泥 还原 铁回收率 

分 类 号：X751[环境科学与工程—环境工程]