添加剂对单膜双室同槽电解膜电积工艺的影响

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。

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

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.