铝电解大修渣加压碱浸-再生冰晶石工业化技术研究  

Research on industrialization technology of pressurized leaching of overhauling slag and regeneration of cryolite from aluminum electrolysis process

作　　者：江俊 尹剑 马路通 周志昌 吴佳壕 孟海平 赵大秀 李得能 郭敏 林艳[1,3] Jiang Jun;Yin Jian;Ma Lutong;Zhou Zhichang;Wu Jiahao;Meng Haiping;Zhao Daxiu;Li Deneng;Guo Min;Lin Yan(College of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming650093,China;Yunnan Yunlv Runxin Aluminum Industry Co.,Ltd.,Gejiu471003,China;Engineering Research Center for Coprocessing and Utilization of Aluminum Electrolysis Solid Waste,Gejiu 471003,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]云南云铝润鑫铝业有限公司,云南个旧471000 [3]云南省铝电解固废协同处理及利用工程研究中心,云南个旧471003

出　　处：《轻金属》2024年第8期11-16,34,共7页Light Metals

基　　金：云南省科技计划工业高新技术专项(202203AA080007)。

摘　　要：本文探究了铝电解大修渣在不同浸出条件下氟、钠、铝等元素迁移规律和浸出液再生制备冰晶石的工艺参数。试验了不同浸出条件与冰晶石沉淀条件,在NaOH浓度50 g/L、反应温度120℃、液固比5∶1、物料粒度60~80目、反应时间3 h的条件下,钠、氟、铝的浸出率可达到80%~85%,浸出渣达到无害化要求;在反应时间4 h,反应温度90℃,酸碱液体积1∶3.5条件下,再生冰晶石纯度达到90%,能够满足铝电解回用要求。This paper explores the migration patterns of elements such as fluorine,sodium and aluminum under different leaching conditions in aluminum electrolysis overhaul slag,as well as the process parameters for preparing cryolite through leaching solution regeneration.Different leaching conditions and cryolite precipitation conditions were tested,NaOH concentration of 50 g/L,reaction temperature of 120℃,liquid-solid ratio of 5∶1,material particle size of 60~80 mesh,and reaction time of 3 h.Under these conditions,sodium,fluorine and aluminum leaching rates can reach 80%~85%,and the leaching residue meets the requirements for harmless treatment.Under the conditions of reaction time 4 h,reaction temperature 90℃,and acid-base solution volume 1∶3.5,the purity of regenerated cryolite reaches 90%,which can meet the requirements of aluminum electrolysis for reuse.

关 键 词：铝电解 危废渣 加压浸出 中和沉淀 再生冰晶石 

分 类 号：TF821[冶金工程—有色金属冶金]