摘要
以氟化锰为脱除剂,通过单因素实验研究氟化锰过量系数、溶液pH值、反应温度以及反应时间对硫酸锰溶液中钙镁脱除率的影响。在氟化锰过量系数2.0、溶液pH=5、反应温度85℃、反应时间80 min的优化工艺条件下,钙和镁脱除率分别为97.06%和95.48%。在此基础上进行了动力学研究,硫酸锰溶液中钙和镁的沉淀反应均符合Avrami方程,其表观活化能分别为48.01 kJ/mol和53.23 kJ/mol,表面化学反应是影响钙镁沉淀反应速率的限制性环节。
The effects of excess coefficient of manganese fluoride,pH value of solution,reaction temperature and reaction time on the removal rate of calcium and magnesium from manganese sulfate solution were studied by performing single factor experiment with manganese fluoride as a removal agent.Under the optimum conditions,including an excess coefficient of manganese fluoride of 2.0,pH of 5,reaction temperature of 85℃and reaction time of 80 min,the removal rates of calcium and magnesium can reach 97.06%and 95.48%,respectively.The kinetic study on this basis shows that the precipitation reactions of both calcium and magnesium in manganese sulfate solution conform to the Avrami equation,with apparent activation energies of 48.01 kJ/mol and 53.23 kJ/mol,respectively.The surface reaction is a factor to limit the precipitation rates of calcium and magnesium.
作者
裴正清
王家伟
王海峰
杨春元
周兴杰
郑可欣
鲁菊
马德华
路坊海
PEI Zhengqing;WANG Jiawei;WANG Haifeng;YANG Chunyuan;ZHOU Xingjie;ZHENG Kexin;LU Ju;MA Dehua;LU Fanghai(College of Materials and Metallurgy,Guizhou University,Guiyang 550025,Guizhou,China;Guizhou Key Laboratory of Metallurgical Engineering and Process Energy Conservation,Guiyang 550025,Guizhou,China;Engineering Technology Research Center of Manganese Material for Batteries,Tongren 554300,Guizhou,China;School of Materials and New Energy Engineering,Guizhou Institute of Technology,Guiyang 550003,Guizhou,China)
出处
《矿冶工程》
CAS
北大核心
2024年第1期111-115,共5页
Mining and Metallurgical Engineering
基金
铜市科研(2021)13号
黔科合重大专项[2022]003
黔科合支撑[2022]重点020
黔科合支撑[2023]一般243。
关键词
硫酸锰溶液
除钙
除镁
钙镁
氟化锰
沉淀
工艺条件
动力学
manganese sulfate solution
calcium removal
magnesium removal
calcium and magnesium
manganese fluoride
precipitation
process conditions
kinetics
