添加剂对单膜双室同槽电解膜电积工艺的影响

doi:10.16085/j.issn.1000-6613.2020-1872

化工进展 ›› 2020, Vol. 39 ›› Issue (S2): 440-446.DOI: 10.16085/j.issn.1000-6613.2020-1872

添加剂对单膜双室同槽电解膜电积工艺的影响

郑洋洋¹^,²(), 宋小三¹^,²(), 王三反¹^,², 张志华³, 宋正平³, 马林³

^1.兰州交通大学环境与市政工程学院，甘肃兰州 730070
^2.兰州交通大学寒旱地区水资源综合利用教育部工程研究中心，甘肃兰州 730070
^3.宁夏天元锰材料研究院，宁夏中宁 755100

收稿日期:2020-09-15 出版日期:2020-11-20 发布日期:2020-11-17
通讯作者: 宋小三
作者简介:郑洋洋（1994—），男，硕士研究生，研究方向为重金属回收与资源化利用。E-mail：zhengyy8018@163.com。
基金资助:
国家科技支撑计划(2015BAE04B01);国家自然科学基金(21466019);宁夏回族自治区重点研发计划重点项目(2020BDE92023)

Influence of additives on the electrowinning process of single membrane and double chamber in the same cell

Yangyang ZHENG¹^,²(), Xiaosan SONG¹^,²(), Sanfan WANG¹^,², Zhihua ZHANG³, Zhengping SONG³, Lin MA³

^1.School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China
^2.Engineering Research Center of Ministry of Education for Comprehensive Utilization of Water Resources in Cold and Drought Areas, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China
^3.Ningxia Tianyuan Manganese Material Research Institute, Zhongning 755100, Ningxia, China

Received:2020-09-15 Online:2020-11-20 Published:2020-11-17
Contact: Xiaosan SONG

摘要/Abstract

摘要：

采用单膜双室膜电积工艺在MnSO₄+(NH₄)₂SO₄电解液体系中电沉积金属锰，同时阳极联产电解二氧化锰并富集回收硫酸，研究了两种典型无机、有机复合添加剂亚硒酸、聚丙烯酰胺+硫脲对膜电积工艺效果的影响。结果表明，单膜双室同槽电解工艺中添加剂的使用对产锰率、酸回收率以及能耗等都有较大改善。无机添加剂亚硒酸的最适浓度在0.3g/L时，其产锰率可达84.9%，酸回收率为79.5%，能耗为5545kW·h/t；有机复合添加剂聚丙烯酰胺浓度为0.01g/L、硫脲浓度为0.02g/L时，其产锰率可达75.1%，酸回收率为76.5%，能耗为6034kW·h/t，此时电沉积锰表面白皙光亮、均匀细致，其形貌、质量都有很大的改观。

关键词: 单膜双室, 添加剂, 产锰率, 酸回收率, 能耗

Abstract:

The single membrane double chamber membrane electrowinning process is used to electrodeposit manganese metal in the MnSO₄+(NH₄)₂SO₄ electrolyte system. At the same time, the anode co-produces electrolytic manganese dioxide and enriches and recovers sulfuric acid. The effect of two typical inorganic and organic compound additives selenious acid, polyacrylamide+thiourea on the effect of membrane electrowinning was studied. The results showed that the use of additives in the single membrane, double chamber, same-cell electrolysis process greatly improved the manganese production rate, acid recovery rate and energy consumption. When the optimal concentration of the inorganic additive selenite is 0.3g/L, the manganese production rate can reach 84.9%, the acid recovery rate is 79.5%, and the energy consumption is 5545kW·h/t; When the concentration of the organic compound additive polyacrylamide is 0.01g/L and thiourea is 0.02g/L, the manganese production rate can reach 75.1%, the acid recovery rate is 76.5%, and the energy consumption is 6034kW·h/t. At this time, the surface of the electrodeposited manganese is white, bright, uniform and detailed, and its morphology and quality are greatly improved.

Key words: single membrane double chamber, additive, manganese production rate, acid recovery rate, energy consumption

中图分类号:

TF792

郑洋洋, 宋小三, 王三反, 张志华, 宋正平, 马林. 添加剂对单膜双室同槽电解膜电积工艺的影响[J]. 化工进展, 2020, 39(S2): 440-446.

Yangyang ZHENG, Xiaosan SONG, Sanfan WANG, Zhihua ZHANG, Zhengping SONG, Lin MA. Influence of additives on the electrowinning process of single membrane and double chamber in the same cell[J]. Chemical Industry and Engineering Progress, 2020, 39(S2): 440-446.

图/表 7

图1 单膜双室同槽电解实验原理

图2 产锰率和能耗随亚硒酸浓度的变化情况

图3 槽电压和酸回收率随亚硒酸浓度的变化情况

图4 不同亚硒酸浓度条件下电沉积锰SEM图（×500倍）

图5 产锰率和能耗随硫脲浓度的变化情况

图6 槽电压和酸回收率随硫脲浓度的变化情况

图7 不同硫脲浓度条件下电沉积锰SEM图（×500倍）

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添加剂对单膜双室同槽电解膜电积工艺的影响

Influence of additives on the electrowinning process of single membrane and double chamber in the same cell

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