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投稿时间：2022-01-13 修订日期：2022-01-23 录用日期：2022-01-26 网络发布日期：2022-04-12
投稿时间：2022-01-13 修订日期：2022-01-23 录用日期：2022-01-26 网络发布日期：2022-04-12
中文摘要: 铝电解废阴极炭块由于含有氟化物和少量氰化物被称为危险固体废弃物，直接填埋或堆存都对环境有很大危害。提出了铝电解槽碳质固废连续隔氧超高温氟、碳高效分离回收技术。通过TGA热重试验和热力学模拟分析热处理过程中的热行为，并利用XRF、XRD和SEM-EDS等分析手段探究焙烧前后阴极炭块的赋存状态及分布规律。研究表明，经隔氧超高温热处理后，所得的石墨碎产品中氰化物充分分解、氟化物含量仅为0.074%，石墨碎中石墨含量达到98.53%。
Abstract:Spent cathode carbon blocks of aluminum electrolysis is called dangerous solid waste because it contains fluoride and a small amount of cyanide. Direct landfill or stockpiling will do great harm to the environment. The efficient separation and recovery technology of fluorine and carbon from solid waste of aluminum electrolysis cell with continuous oxygen isolation and ultra-high temperature were put forward. The thermal behavior during heat treatment was analyzed by TGA test and thermodynamic simulation, and the occurrence and distribution of cathode carbon blocks before and after roasting were investigated by XRF, XRD and SEM-EDS. The results show that the cyanide in graphite scrap obtained after oxygen isolation ultra-high temperature thermal treatment is fully decomposed, the content of fluoride is only 0.074%, and the content of graphite is 98.53%.
keywords: spent cathode carbon blocks oxygen isolation ultra-high temperature thermal treatment TGA thermodynamic analysis
文章编号： 中图分类号： 文献标志码：
基金项目:国家重点研发计划项目(2018YFC1901901，2018YFC1901904)
| 作者 | 单位 | |
| 刘艳 | 中南大学 资源加工与生物工程学院 | liuyan2017r@163.com |
| 王帅 | 中南大学 资源加工与生物工程学院 | |
| 骆有发 | 矿冶科技集团有限公司 | |
| 刘海营 | 矿冶科技集团有限公司 | |
| 申士富 | 矿冶科技集团有限公司 | |
| 王金玲 | 矿冶科技集团有限公司 | |
| 王丽* | 中南大学 资源加工与生物工程学院 | li_wang@csu.edu.cn |
引用文本：
刘艳,王帅,骆有发,刘海营,申士富,王金玲,王丽.隔氧超高温热处理对废阴极炭块的脱毒机理[J].有色金属（冶炼部分）,2022(5):138-146.
LIU Yan,WANG Shuai,LUO You-fa,LIU Hai-ying,SHEN Shi-fu,WANG Jin-ling,WANG Li.Detoxification Mechanism of Spent Cathode Carbon Blocks by Oxygen Isolation Ultra-high Temperature Thermal Treatment[J].Nonferrous Metals (Extractive Metallurgy),2022(5):138-146.
刘艳,王帅,骆有发,刘海营,申士富,王金玲,王丽.隔氧超高温热处理对废阴极炭块的脱毒机理[J].有色金属（冶炼部分）,2022(5):138-146.
LIU Yan,WANG Shuai,LUO You-fa,LIU Hai-ying,SHEN Shi-fu,WANG Jin-ling,WANG Li.Detoxification Mechanism of Spent Cathode Carbon Blocks by Oxygen Isolation Ultra-high Temperature Thermal Treatment[J].Nonferrous Metals (Extractive Metallurgy),2022(5):138-146.
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