亚硫酸铵在电沉积锰工艺中的作用

Effects of Ammonium Sulfite on Electrolytic Manganese

研究了以(NH_(4))_(2)SO_(3)作添加剂,以MnSO_(4)-(NH_(4))_(2)SO_(4)-H_(2)O体系电沉积金属锰,考察了电流密度、亚硫酸铵用量、Mn^(2+)质量浓度、温度对阴极锰沉积量和电流效率的影响。结果表明:以MnSO_(4)-(NH_(4))_(2)SO_(4)-H_(2)O体系电解锰,在温度45℃、Mn^(2+)质量浓度35 g/L、硫酸铵质量浓度120 g/L、电流密度298.08 A/m^(2)、pH=7.5、(NH_(4))_(2)SO_(3)用量0.12 g/L条件下,电流效率为67.42%,电沉积的锰为α-Mn。

Electrodeposition manganese in MnSO_(4)-(NH_(4))_(2)SO_(4)-H_(2)O system using(NH_(4))_(2)SO_(3)as additive was researched.The effects of current density,ammonium sulfite dosage,Mn^(2+)mass concentration and temperature on cathode manganese deposition and current efficiency were examined.The results show that in MnSO_(4)-(NH_(4))_(2)SO_(4)-H_(2)O system,under the optimum conditions of 45℃,Mn^(2+)mass concentration of 35 g/L,ammonium sulfate mass concentration of 120 g/L,pH=7.5,current density of 298.08 A/m^(2)and(NH_(4))_(2)SO_(3)dosage of 0.12 g/L,the current efficiency is 67.42%and electrodeposited manganese isα-Mn.