氯化物和硫酸盐体系电解锰工艺比较  

Comparison of Electrolytic Manganese Process in Chloride and Sulfate Electrolyte

作　　者：李彦[1] 郑凡[1] 王铎 朱华[1] 

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430079

出　　处：《中国锰业》2018年第1期122-125,共4页China Manganese Industry

基　　金：国家科技支撑计划(2015BAB01B01)

摘　　要：采用与传统硫酸盐体系相似的电解质浓度,利用阴离子交换膜电解槽分别在氯化物和硫酸盐电解质体系中开展锰的恒电流沉积实验。结果表明:锰离子浓度同为20 g/L时,氯化物体系的电流效率高出硫酸盐体系5%~6%。当提高锰离子浓度为0.75 mol/L,同时调节阴极电解液pH=7.0时,采用亚硫酸铵为添加剂时,电流效率可达76%,比现有工业无硒电解工艺高近20%;采用SeO_2添加剂(加入量为0.03 g/L SeO_2)时,电流效率达88%,能耗降至4 300 kW·h/t。研究证实:采用氯化物体系电解沉积锰确实具有高效率、低能耗的优点。Applying the similar sulfate electrolyte concentration in current industrial process,the galvanostatic electrolysis deposition of manganese was carried out on chloride and sulfate electrolyte in an anion exchange of electrolytic membrane reactor,respectively. The results show that the current efficiency in chloride electrolyte is 5% ~ 6% higher than that in the sulfate electrolyte when the concentration of manganese ions will be 20 g/L. As the concentration of manganese ions will be further improved to 0. 75 mol/L and the pH value controlled to 7. 0.The current efficiency can be up to 76% when using ammonium sulfite as additive. When 0. 03 g/L SeO_2 was used as the additive,the current efficiency can be further increased to 88% and the energy consumption is reduced to 4 300 k W·h/t. The results show that electro deposition of manganese in chloride baths really have the advantages of high current efficiency and low energy consumption.

关 键 词：金属锰 电沉积 氯化锰 工艺对比 

分 类 号：TF111.33[冶金工程—冶金物理化学]