The Experiment Of CO₂+O₂ In-situ Leaching Of Uranium And Its Dynamics

This experiment is based on CO₂+O₂in situ leaching of uranium technology characteristics.The CO₂+O₂static leaching test and CO₂+O₂pressurized column leaching test were carried out on a sandstone type uranium deposit in Xinjiang.Obtained the following conclusions:?1?CO₂+O₂pressurized static leaching test showed.when the total pressure is2.0 MPa of CO₂+O₂and the liquid-solid ratio of 10:1 which it is an optimal leaching condition and the uranium leaching rate of 66.67%.Show that the uranium deposit is suitable for CO₂+O₂leaching process and the test results for the follow-up of CO₂+O₂pressure column leaching experiment provides guidance basis.?2?CO₂+O₂pressurized column leaching experiments showed.when the liquid-solid ratio are closed to 3:1,the uranium leaching rate reach 86.62%,besides the leaching process is stable and no other impurities.Show that the uranium deposit is suitable for CO₂+O₂leaching process and the test results for the CO₂+O₂field leaching experiment and engineering design which be to provide theoretical basis and guidance.?3?At the beginning of CO₂+O₂pressurized column leaching experiments,the uranium leaching liquid concentration is low and then rapidly rising.The peak value is reached when the liquid-solid ratio is 0.25:1.And then gradually reduced to a certain concentration and then decreased slowly.The gentle period was longer when account for about two-thirds of the leaching process.The leaching cycle is 34 day??4?According the test data of CO₂+O₂pressure column leaching,and it be based on the reaction kinetics equation,the kinetic equation of the leaching process was obtained through data fitting and sorting.The leaching process was mainly controlled by diffusion at the early stage of leaching and the latter was mainly controlled by chemical reaction.