ABSTRACT

In industrial electrolytic manganese metal process, the energy consumption closely related to the electrolysis of cathode and anode. The effect of Cl^- concentration on electrochemical oscillation at the anode of the electrolytic manganese metal cell was investigated. The results showed that the electrochemical oscillation at the anode was inhibited by Cl^-, and the amplitude and frequency of the electrochemical oscillation decreased as the increase of Cl^- concentration. When the concentration of Cl^- was 2.68 g/L, the cathode and anode electrodes could be effectively activated, and the manganese current efficiency reached its minimum, correspondingly, the power consumption reached its maximum. In addition, the presence of the chloride reduced the production of MnO₂ at the anode surface. ClO₄⁻ and free ions formed insoluble amorphous structures on the surface of the anode with the increase in reaction time and chloride ion concentration, and the insoluble amorphous structures prevented further generation of MnO₂. Thus, electrolytic manganese metal energy consumption decreased.

摘要

在工业电解金属锰过程中，能耗与阴极和阳极的电解密切相关。研究了Cl ^-浓度对电解锰金属电池阳极电化学振荡的影响。结果表明，阳极处的电化学振荡受到Cl ^{- 的}抑制，电化学振荡的幅度和频率随着Cl ^-浓度的增加而降低。当 Cl 的浓度^-为 2.68 g/L，阴极和阳极可以被有效激活，锰电流效率达到最低，相应地，功耗达到最高。此外，氯化物的存在减少了阳极表面MnO ₂的产生。随着反应时间和氯离子浓度的增加，ClO ₄ ^-和游离离子在阳极表面形成不溶性无定形结构，不溶性无定形结构阻止了MnO _{2 的}进一步生成。因此，电解金属锰的能耗降低。