Investigation on the Conversion of the Final Uranium Concentrate

Batch precipitation of the final treated uranium concentrate as ammonium diuranate (ADU) or peroxide was investigated as a function of pH and excess peroxide at room temperature. It was found that as the pH increases, the amount of uranium in the supernatant decreases and at a pH between 5.0 and 6.5 an almost negligible quantities of uranium were present in the supernatant solution when ammonium hydroxide was used as the precipitant. On the other hand the quantities of uranium in the supernatant decreased as the amount of peroxide increased and at an excess of peroxide of 200Vo a negligible amount of uranium was found in the supernatant at a pH of (1.8 - 2.0).The precipitation was done from different concentrations of uranium, namely 25, 50, 100, 175, 250, and 350 glL.It is concluded that the use of ammonium hydroxide and peroxide precipitants proved to be efficient for uranium precipitations. Moreover, the first precipitant is practically preferable.