Inorganic Materials and Ceramic Matrix composites |
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Control Factors of Electrolytic Manganese and Particulate Electrolytic Manganese Dioxide in Double-membrane Three-chamber Electrolyzer |
XU Qi1, WANG Sanfan1, SUN Baichao2
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1 Engineering Research Center of Water Resources Utilization in Cold and Drought Region, Ministry of Education, School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China 2 China Construction Steel Structure Corp. LTD, Shenzhen 518000, China |
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Abstract Double-membrane three-chamber electrolysis method was used to electrolyze manganese and particulate electrolytic manganese dioxide in the same tank, and the middle compartment was used to recover sulfuric acid.The effects of Mn2+ concentration, current density, electrolysis temperature, cathode (NH4)2SO4 concentration and anode H2SO4 concentration on electrodeposition were investigated.The results showed that:when the concentration of Mn2+ in the catholyte was 40 g/L, the initial pH is 6.9, the concentration of (NH4)2SO4 in the catholyte was 110 g/L, the cathode current density was 400 A/m2, the concentration of Mn2+ in the anolyte was 40 g/L, and the concentration of H2SO4 in the anolyte was 2.5 mol/L, the anode current density was 800 A/m2, the pole spacing was 90 mm,the electrolysis temperature was 45 ℃, and the electrolysis time was 5 h, the cathode current efficiency reached 77.53%, the energy consumption was 6 725.28 kW·h/t, the anode current efficiency reached 84.87%, the energy consumption was 3 883.91 kW·h/t, and the acid recovery rate reached 63.2%.The surface of manganese metal is smooth and flat, and the grains are blocky and stacked in layers.The particulate electrolytic manganese dioxide particles are fine,the particle size distribution is uniform, and the crystal morphology is relatively regular.
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Published: 14 July 2020
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Fund:This work was financially supported by the National Natural Science Foundation of China (21466019), the Excellent Platform Fundation of Lanzhou Jiaotong University LZJTU(201606). |
About author:: Qi Xuis a master degree candidate of School of Environmental and Municipal Engineering, Lanzhou Jiaotong University,China.Her research focuses on cleaning and energy-saving technologies for manganese electrodeposition. Sanfan Wangis a professor and doctoral supervisor of Lanzhou Jiaotong University.He is mainly engaged in teaching and research work in environmental enginee-ring, municipal engineering, comprehensive utilization of water resources, heavy metal recycling and resource utilization.He has presided over more than 30 research projects and published more than 140 research papers.He has presided over the completion of the National Science and Technology Support Program for “Green Membrane Metal Electrochemical Production Technology and Equipment Research and Application Demonstration”. |
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1 Zhang D S,Ma Z,Spasova M,et al. Particle & Particle Systems Characte-rization, 2017, 34(3),1. 2 Banerjee A,Ziv B,Luski S,et al. Journal of Power Sources, 2017,341,457. 3 Zeng X B. China's Manganese Industry, 2014, 32(1),1(in Chinese). 曾湘波. 中国锰业, 2014, 32(1), 1. 4 Biswal A,Tripathy B C,Sanjay K. Cheminform, 2015, 72(5),58255. 5 Liu Z H,Sun X G,Pang Z P,et al. Materials Reports B:Research Papers, 2016,30(10),17(in Chinese). 刘珍红,孙晓刚,庞志鹏,等. 材料导报:研究篇, 2016,30(10),17. 6 Luo T S. China's Manganese Industry, 1997(4),40(in Chinese). 罗天盛. 中国锰业, 1997(4),40. 7 Liu R P,Liu H J,Zhao X,et al. Journal of Hazardous Materials, 2010, 176(1-3),926. 8 Niu S S.The study on preparing particle manganese dioxide and LiMn2O4 from manganese anode slag.Master's Thesis,Central South University,China,2012(in Chinese). 牛莎莎.从锰阳极渣制备微粒电解二氧化锰及锰酸锂的研究.硕士学位论文,中南大学,2012. 9 Chen H Q,Niu S S,Wang Z X,et al. Hunan Nonferrous Metals, 2015,31(3),51(in Chinese). 陈海清,牛莎莎,王志兴,等. 湖南有色金属, 2015,31(3),51. 10 Huang Q M,Wang C P,Zhou H,et al. Nonferrous Metals(Extractive Me-tallurgy), 2010(6),6(in Chinese). 黄齐茂,王春平,周红,等. 有色金属(冶炼部分), 2010(6),6. 11 Duan N,Dan Z G,Wang G F,et al. Journal of Cleaner Production, 2011,19(17-18),2082. 12 Li T,Wang S F,Zhou J. Materials Review, 2016,30(S2),432(in Chinese). 李韬,王三反,周键. 材料导报, 2016,30(S2),432. 13 Kazazi M. Ceramics International, 2018, 44(9),10863. 14 Sniekers J, Geysens P, Vander H T, et al. Dalton Transactions, DOI: 10.1039.C8DT00283E. 15 Zheng F,Huang B X,Bi W N,et al. China's Manganese Industry, 2016,34(5),75(in Chinese). 郑凡,黄炳行,闭伟宁,等.中国锰业, 2016,34(5),75. 16 Cai Z Y.Preparation of manganese sulfate by reduction leaching of pyrolusite with crap iron and its electrolytic techniques.Master's Thesis,Hunan University of Science and Technology,China,2012(in Chinese). 蔡振勇. 废铁屑还原浸出软锰矿制备硫酸锰及其电解工艺研究.硕士学位论文,湖南科技大学,2012. 17 Zhang H, Meng H M. Materials Science Forum, 2014, 789,355. 18 Nesvaderani F,Bonakdarpour A,Wilkinson D P. Journal of the Electrochemical Society, 2017,164(4),810. 19 Tang J, Meng H M,He Y F. Journal of Applied Electrochemistry, 2017,47(5),653. 20 Zhang H.Research on production recovery process and pilot test from the amberplex metal electrodeposition technology.Master's Thesis,Lanzhou Jiaotong University,China,2015(in Chinese). 张昊. 离子膜金属电积生产回收技术及中试研究.硕士学位论文,兰州交通大学,2015. 21 Yang W C.The study on manganese electrolytic deposition process and new anode.Master's Thesis,Central South University,China,2013(in Chinese). 杨文翠. 锰电解沉积工艺及新型阳极研究.硕士学位论文,中南大学,2013. 22 Feng Y L,Du Y L,Li H,et al. Hydrometallurgy of China, 2014,33(3),203(in Chinese). 冯雅丽,杜云龙,李辉,等. 湿法冶金, 2014,33(3),203. 23 Yang F,Jiang L X,Yu X Y,et al. The Chinese Journal of Nonferrous Metals, 2018,28(12),2568(in Chinese). 杨凡,蒋良兴,于枭影,等. 中国有色金属学报, 2018,28(12),2568. 24 Hayakawa S,Doihara K,Okita T,et al. Journal of Materials Science, 2019,54(17),11509. 25 Liu X Y, Martinez E, Uberuaga B P. Scientific reports, 2019,9(1),6499. |
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