过硫酸铵强化电解锰渣浸出实验研究  

Research on Leaching of Electrolytic Manganese Residue Enhanced by Ammonium Persulfate

作　　者：张迎春 刘作华[1] 郑国灿[1] 谢昭明[1] Zhang Yingchun;Liu Zuohua;Zheng Guocan;Xie Zhaoming(School of Chemistry and Chemical Engineering,Chongqing University,Chongqing,400044)

机构地区：[1]重庆大学化学化工学院,重庆400044

出　　处：《当代化工研究》2024年第16期18-20,共3页Modern Chemical Research

基　　金：国家重点研发计划项目“电解锰渣复盐解耦与全组元梯次利用技术”(项目编号:2022YFC3901204);国家重点研发计划项目“多源锰资源禀赋特性与组元迁移转化规律研究”(项目编号:2022YFC3901201)。

摘　　要：电解锰渣中残余较多的锰,不仅浪费锰资源,还会制约锰渣的综合利用。利用过硫酸铵强化浸出锰渣中的锰,降低污染物含量,研究了浸出工艺参数对锰浸出率和浸出毒性的影响,并对浸出前后电解锰渣的物相及形貌进行了分析,探究其浸出机理。结果表明:在浸出时间120 min,过硫酸铵浓度30 g/L,浸出温度90℃,液固体积质量比6 mL/g条件下,锰浸出率约为88.91%。浸出后锰渣中的锰、氨氮浸出毒性,水溶性盐总量和有机质含量大幅降低,满足《一般工业固体废物贮存和填埋污染控制标准》(GB 18599—2020)进入Ⅱ类场的要求。过硫酸铵能腐蚀破坏锰渣中团聚包裹结构,同时提供酸性环境,促进锰的溶出。The residual manganese in electrolytic manganese residue not only wastes manganese resources,but also restricts the compre-hensive utilization of manganese residue.Ammonium persulfate has been used to leach manganese from manganese residue and reduce the content of pollutants.The influence of leaching parameters on the manganese leaching rate and leaching toxicity was studied.The phase,structure and mor-phology of electrolytic manganese residue before and after leaching was analyzed to explore the leaching mechanism.The results showed that under the conditions of leaching time of 120 min,ammonium persulfate concentration of 30 g/L,leaching temperature of 90℃and liquid-solid mass ra-tio of 6 mL/g,the leaching rate of Mn was about 88.91%.And the leaching concentration of manganese and ammonia nitrogen,total soluble salt and organic matter in manganese residue decreased significantly,which meets the requirements of"General Industrial Solid Waste Storage and Landfill Pollution Control Standard"(GB 18599—2020)to enter the ClassⅡfield.Ammonium persulfate can corrode and destroy the agglomeration struc-ture of manganese residue,and provide an acidic environment to promote the dissolution of manganese.

关 键 词：电解锰渣 过硫酸铵 浸出 毒性浸出 机制 

分 类 号：TQ[化学工程]