离子交换膜电解法处理氯化亚铁浸出液试验研究

Treatment of Ferrous Chloride Solution by Ion Exchange Membrane Electrolysis Process

研究了采用离子交换膜电解法从氯化亚铁浸出液中提取铁并再生氯化铁溶液,考察了Fe2+质量浓度、溶液pH、电解温度、电流密度、极板间距及Fe3+质量浓度等对电解电流效率及槽电压的影响。试验结果表明:在Fe2+质量浓度100g/L、阴极电流密度15A/dm2、温度35℃、溶液pH=1.3、极板间距30mm、电解时间3h条件下,阴、阳极电流效率分别可达96%和99%,槽电压可控制在3V以下。

The extraction of iron and recycling of ferric chloride from ferrous chloride solution by ion exchange membrane electrolysis process were studied. The influences of Fe^2＋ concentration in the solution,solution pH, current density, temperature, polar plate spacing and Fe^3＋ concentration in the solution on current efficiency and cell voltage were examined. The results indicate that the current efficiency of cathode and anode and cell voltage are 96%, 99% and below 3 V, respectively at the conditions of Fe^2＋ concentration of 100 g/L,solution pH of 1.3,cathode current density of 15 A/dm^2 , temperature of 35℃,polar plate spacing of 30 mm and electrolysis time of 3 h.