摘要
研究了用硫酸浸出电解锰渣中的锰,通过单因素试验和正交试验优化了工艺参数,并对电解锰渣浸出前后的物相、结构、形貌,以及浸出锰动力学进行了分析,建立了锰浸出模型,探究了浸出机制。结果表明:在粒径200目、搅拌速度为400 r/min、浸出温度95℃、硫酸浓度1.5 mol/L、浸出时间120 min、液固体积质量比11/1优化条件下,Mn浸出率达97.90%;锰浸出动力学符合液-固未反应收缩核模型,受化学反应控制;在浸出锰过程中,可以通过控制液固体积质量比、温度提高Mn浸出率。
The leaching of manganese from electrolytic manganese residue with sulfuric acid was studied,and the process parameters were optimized by single factor test and orthogonal test.The phase,structure,morphology and leaching kinetics of electrolytic manganese residue before and after leaching were analyzed.The leaching model was established and the leaching mechanism was explored.The results show that under the optimal conditions of particle size of 200 mesh,stirring speed of 400 r/min,leaching temperature of 95℃,sulfuric acid concentration of 1.5 mol/L,leaching time of 120 min and liquid volume/solid mass ratio of 11/1,the leaching rate of Mn can reach 97.90%.Manganese leaching kinetics accords with the liquid-solid shrinkage model and is controlled by chemical reaction.In the process of manganese leaching,the leaching rate of Mn can be improved by controlling the liquid volume/solid mass ratio and temperature.
作者
孙宁宁
陈喜平
张雅琪
SUN Ningning;CHEN Xiping;ZHANG Yaqi(School of Material Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;National and Local Joint Engineering Research Center for Green Mineral Metallurgy and Processing,Zhengzhou 450001,China)
出处
《湿法冶金》
CAS
北大核心
2024年第1期39-46,共8页
Hydrometallurgy of China
基金
郑州大学科研发展基金资助项目(25124510001)。
关键词
电解锰渣
硫酸
浸出
锰
动力学
模型
机制
electrolytic manganese slag
sulfuric acid
leaching
manganese
kinetics
model
mechanism
