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探讨了反应温度、H2SO4浓度、CuSO4浓度、反应时间、SO2气流量等因素对SO2还原铜电解液中As(Ⅴ)的影响,并对浓缩共晶作用下铜电解液中As(III)的脱除行为进行了研究。研究表明:As(V)还原率随着反应温度和H2SO4浓度的升高而降低,随着SO2气流量的增大及反应时间的延长而升高。当反应温度为65°C,H2SO4浓度为203g/L,CuSO4浓度为80g/L,SO2流量为200mL/min,反应时间为2h时,铜电解液中As(Ⅴ)还原率为92%;铜电解液中的As(V)还原后,将铜电解液浓缩至H2SO4浓度为645g/L时,As、Cu、Sb、Bi脱除率分别达到83.9%,87.1%,21%,84.7%.XRD分析结果表明:结晶产物中含有As2O3和CuSO4·5H2O等物相。
The effects of reaction temperature, H2SO4 concentration, CuSO4 concentration, reaction time and SO2 gas flow on As (Ⅴ) in SO2 reduction copper electrolyte were investigated. As (Ⅲ) In addition to the behavior of the study. The results show that the reduction rate of As (V) decreases with the increase of reaction temperature and H2SO4 concentration, and increases with the increase of SO2 gas flow rate and reaction time. When the reaction temperature is 65 ° C, H2SO4 concentration of 203g / L, CuSO4 concentration of 80g / L, SO2 flow rate of 200mL / min, the reaction time was 2h, the As (Ⅴ) reduction rate of the copper electrolyte was 92% After the reduction of As (V) in the electrolyte, the removal efficiencies of As, Cu, Sb and Bi reached 83.9%, 87.1%, 21% and 84.7%, respectively, after concentrating the copper electrolyte to a concentration of 645g / The analysis results show that the crystalline product contains As2O3 and CuSO4 · 5H2O and other phases.