摘要
铝电解废槽衬是铝电解工业产生的一种危险固体废弃物,含可溶的氟化物和氰化物,会对周围的环境造成危害。介绍了铝电解废槽衬的形成原因、废阴极炭块的综合回收利用工艺以及废耐火材料的无害化处理技术。总结了废槽衬中有害物质的存在形式及分布位置,分析了电解铝过程中钠的渗透行为以及阴极炭块石墨化过程的机理及影响因素。
Spent pot-lining from aluminum smelters is a kind of dangerous solid waste produced by aluminum electrolytic industry,and it contains soluble fluoride and cyanide,which is harmful to the surrounding environment.The formation process of waste aluminum electrolytic tank lining,comprehensive utilization of cathode carbon block,and harmless treatrnent technology of refractory were briefly introduced.Moreover,the existence form and distribution of harmful substances in spent pot-lining were summarized.The penetration behavior of sodium in electrolytic aluminum was described whereas the mechanism and influencing factors of graphitization of cathode carbon block were also analyzed.
作者
李雪莲
曾华
徐芮
王丽
LI Xue-lian;ZENG;Hua;XU Rui;WANG Li(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083)
出处
《矿冶》
CAS
2022年第3期50-58,共9页
Mining And Metallurgy
基金
国家重点研发计划项目(2018YFC1901901,2018YFC1901904)。
关键词
废槽衬
固体废弃物
分离回收
无害化处理
石墨化
spent pot-lining
solid waste
separation and recovery
harmless treatment
graphitization
