萃取分离电解锰阳极液中锰、镁离子试验研究

Separating of Manganese and Magnesium From Electrolytic Manganese Anode Solution Using P204

电解锰过程中,阳极液中的镁离子在闭路循环中会逐渐积累,使电流效率下降,能耗增大,同时也影响电解锰产品质量。研究了用P204-磺化煤油溶液萃取分离阳极液中的锰离子和镁离子,分别考察了P204体积分数、有机相皂化率、水相pH、相比等参数对锰离子和镁离子萃取率的影响。结果表明,在溶液温度35℃、P204体积分数25%、有机相皂化率50%、水相pH=4.0,Vo∶Va=2∶1的最佳条件下,经4级逆流萃取,锰离子萃取率达99.5%,镁离子萃取率为31.8%。

In the process of electrolytic manganese ,the magnesium ions in anode solution will gradually accumulated in closed cycle to reduce current efficiency and increase energy consumption ,and affect the quality of electrolytic manganese product .The separation of manganese and magnesium from the electrolytic manganese anode solution using P204 in sulfonated kerosene was investigated .The influence of several parameters on the extraction rate of manganese and magnesium were examined , such as P204 volume fraction in organic phase ,saponification rate of the organic phase ,water phase pH ,the ratio of organic phase volume to water phase volume .The results suggest that under the conditions of temperature of 35 ℃ ,P204 volume fraction of 25% ,organic phase saponification rate of 50% ,water phase pH of 4 .0 ,Vo ∶Va = 2∶1 ,and four‐stages countercurrent extraction ,satisfactory extraction efficiency （99 .5% ） of manganese ion is achieved ,while the extraction of magnesium is approximately 31 .8% ,manganese ion and magnesium ion are effectively separated at a low cost .