基于化学沉淀法回收硫酸锰废液中的锰  

Recovery manganese from manganese sulfate waste solution basedon chemical precipitation method

作　　者：何欢 李绵庆 谭崇梅 HE Huan;LI Mianqing;TAN Chongmei(Shanghai Jayson New Energy Materials Group Co.,Ltd.,Shanghai 201306,China])

机构地区：[1]高点(深圳)科技有限公司,广东深圳518110 [2]上海锦源晟新能源材料集团有限公司,上海201306

出　　处：《电池》2025年第2期389-395,共7页Battery Bimonthly

摘　　要：为实现含锰废料的循环综合利用并减少污染物排放,通过化学沉淀法回收硫酸锰废液中的锰,并确定回收的最佳工艺参数,通过XRD、SEM和电感耦合等离子体光谱(ICP)等测试,分析锰沉淀物样品。当沉淀剂用量为理论值的1.2倍、反应温度为60℃、溶液的pH值为5、反应时间为1.5 h、搅拌速度为350 r/min时,废液中锰的回收率高于99%。晶相结构分析表明,沉淀物为二氧化锰(MnO_(2)),锰含量大于56%。以实验MnO_(2)制备的锰酸锂正极材料,表面颗粒均匀度较好,装配的扣式半电池以0.1 C倍率在3.00~4.35 V循环,首次放电比容量达到109.3 mAh/g,与商业级正极材料相当。To achieve the comprehensive utilization of manganese containing waste and reduce pollutant emissions,manganese from manganese sulfate waste liquid is recovered by chemical precipitation method,the optimal process parameters for recovery are determined.The manganese precipitate samples are analyzed by XRD,SEM and inductively coupled plasma(ICP)tests.When the dosage of precipitant is 1.2 times of the theoretical value,the reaction temperature is 60℃,the pH value of the solution is 5,the reaction time is 1.5 h and the stirring speed is 350 r/min,the recovery rate of manganese in the waste liquid is higher than 99%.Crystal structure analysis shows that the precipitate is manganese dioxide(MnO_(2))with a manganese content greater than 56%.The lithium manganese oxide cathode material prepared from experimental MnO_(2) has good surface particle uniformity,the assembled button half cell has an initial specific discharge capacity of 109.3 mAh/g when cycled at a rate of 0.1 C in 3.00-4.35 V,which is comparable to commercial grade cathode materials.

关 键 词：硫酸锰废液 化学沉淀 二氧化锰(MnO_(2)) 正极材料 

分 类 号：TM912.9[电气工程—电力电子与电力传动] TD98[矿业工程—选矿]