Research on Re-extraction Technology for Uranium Refining Based on Fractionation Extraction

Abstract TBP extraction in nitric acid system is the core purification process of wet method for uranium refining and conversion. Reextraction based on fractionation was proposed, according to characteristics requirements extraction. The operation line step reextraction were obtained through mathematical model, control law explained. bench test carried out investigate stable concentration variation related components. study shows that can run stably. After extraction, organic phase reach 120g/L, saturation 96.7%, raffinate less than 10mg/L, impurity components greatly reduced. technology facility which maintains state high vs. low concentration.