液体阴极法回收盐渣中钚离子的模拟实验

    Simulation Experiment on Recovering Plutonium Ion From Pyrochemical Salt Residues by Liquid Cathod Method

    • 摘要: 采用液体阴极法电解NaCl-KCl-CeCl3熔盐,回收熔盐中的铈离子以模拟高温化学工艺废盐渣中钚离子的回收。研究了初始CeCl3浓度、温度、阴极电流密度对电解指标的影响,确定了初始CeCl3质量分数为5%、温度750 ℃、阴极电流密度0.10 A/cm2时,熔盐对Ce的净化系数可达130,盐渣中残留的CeCl3质量分数可降低到0.04%以下。实验证实了液体阴极法有望应用于废盐渣中钚离子的回收。

       

      Abstract: The liquid cathod method was used for recovering cerium ion from NaCl-KCl-CeCl3 molten salt, as simulation experiment of recovering plutonium ion from pyrochemical salt residues. The effects of the initial mass fraction of CeCl3, temperature and cathod current density (Dk) on the electrolytic index were studied. The optimum technological conditions were determined. At CeCl3 initial mass fraction 5%, electrolytic temperature 750 ℃ and Dk=0.10 A/cm2, the decontamination coefficient is above 130, and the mass fraction of CeCl3 in residues is below 0.04%. The results confirm that the liquid cathod method is expected to be used for recovering plutonium ion from pyrochemical salt residues.

       

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