Study on the Growth Law of Manganese in Electrolysis Process of MnSO4 Solution Containing Magnesium

Abstract

Abstract At present, there was no good industrial removal method for soluble impurity Mg2+ in electrolytic manganese industrial production, so MgSO4-MnSO4-(NH4)2 SO4 compound salt crystal with minimal solubility was formed by cyclic enrichment in solution. On the one hand, it caused the loss of manganese, ammonium and other main components, on the other hand, a large amount of storage caused environmental pollution. In order to find out the harmful effect of magnesium on the production of manganese in an all-round way, this paper studied the growth and deposition of manganese when the concentration of Mg2+ was 25g/L. The results showed that with the increase of electrolysis time, the grain size increases from 42.11μm for 2h to 185.71 μm for 10h, and the current efficiency gradually decreased from 73.3% for 2h to 67.26% for 10h. After 8 hours of electrolysis, the growth rate of grain size and the decrease rate of current efficiency were improved, and there were a certain relationship between them.