双膜三室同槽电解金属锰和微粒电解二氧化锰的控制因素

doi:10.11896/cldb.19070057

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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.

Key words： manganese particulate electrolytic manganese dioxide double-membrane three-chamber current efficiency acid recovery

Published: 14 July 2020

CLC number:

TF792

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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XU Qi,WANG Sanfan,SUN Baichao. Control Factors of Electrolytic Manganese and Particulate Electrolytic Manganese Dioxide in Double-membrane Three-chamber Electrolyzer[J]. Materials Reports, 2020, 34(14): 14016-14022.

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http://www.mater-rep.com/EN/10.11896/cldb.19070057 OR http://www.mater-rep.com/EN/Y2020/V34/I14/14016

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