Influence of the electrolyte composition on the electrical conductivity, density and viscosity of the zinc electrolyte

摘要

The electrical conductivity, density and viscosity of acidic zinc sulfate solutions containing magnesium and manganese sulfates for zinc electrowinning were measured. The concentrations of the sulfates were selected from ato 3.0 mol/l for H2S04, ZnSO, and MgS04, and ato 0.2 mol/l for MnS04. The temperature was between 303 and 323 K. The effects of alcohol additions such asmethanol, ethylene glycol and glycerin to the acidic zinc sulfate solutions were also investigated.The electrical conductivity for the sulfate solutions of H2S04-ZnS04-MgSO,-MnS04-H20 system increased with the concentration of the H2S04and with temperature. The density of the solutions increased with the concentration of sulfates, but slightly decreased with temperature. Theirviscosities increased with the concentration of the sulfates and decreased with temperature.The alcohol additions to the acidic zinc sulfate solutions had little effect on the density and viscosity. Nevertheless, the electrical conductivity of the solutions decreased with the concentration of the alcohol additions.