Study on EMD Ion Transport Mechanism of Co-production of Electrolytic Manganese with Single Membrane and Two Chambers
SONG Xiaosan1,2, ZHENG Yangyang1, WANG Sanfan1, ZHANG Zhihua3, SONG Zhengping3, MA Lin3
1 Engineering Research Center of Ministry of Education for Comprehensive Utilization of Water Resources in Cold and Drought Areas, Lanzhou Jiaotong University,Lanzhou 730070, China 2 Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China 3 Ningxia Tianyuan Manganese Material Research Institute, Zhongning 755100,China
Abstract: In view of the many drawbacks in the traditional cloth-type membrane bag electrolysis technology process,a single-membrane double-chamber membrane electrolysis process was proposed, using MnSO4+(NH4)2SO4 as the electrolyte system to realize co-production of electroly-tic manganese dioxide at the anode while producing manganese at the cathode,and recover sulfuric acid in the anode chamber. By measuring the changes of the ion components in the cathode and anode chambers, the ion transmission behavior in the electrolysis process is analyzed in depth to verify the technical feasibility of the single-membrane double-chamber electrolysis with the same tank. The experimental results show that the single-membrane double-chamber electrolysis method can effectively realize the electrolytic production of manganese dioxide in parallel with the electrodeposition of metal manganese, and at the same time recover sulfuric acid at the anode. The sulfuric acid concentration reaches 1.5 mol/L, which meets the front-end manganese ore acid leaching process requirements,promote the efficient recycling of resources.The cathode manganese production rate and anodic acid recovery rate using TRJAM-10W anion exchange membrane are the highest, reaching 77.0% and 64.3%, respectively, while the anode EMD production rate of Ionsep-HC anion exchange membrane is the highest at 27.3%. TRJAM-10W anion exchange membrane has the lowest cell voltage of 4.43 V, and its electrical energy consumption is also the lowest at 5 607 kW·h·t-1.
宋小三, 郑洋洋, 王三反, 张志华, 宋正平, 马林. 单膜双室同槽电解金属锰联产EMD离子的传输机理研究[J]. 材料导报, 2021, 35(18): 18141-18145.
SONG Xiaosan, ZHENG Yangyang, WANG Sanfan, ZHANG Zhihua, SONG Zhengping, MA Lin. Study on EMD Ion Transport Mechanism of Co-production of Electrolytic Manganese with Single Membrane and Two Chambers. Materials Reports, 2021, 35(18): 18141-18145.
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2021, Vol. 35 
