"CO2+O2"中性浸出铀水冶一体化工艺研究OA

A uranium deposit in Xinjiang adopts the"CO2+O2"neutral leaching process.When trea-ting the leachate with a fixed bed,the resin's adsorption capacity is reduced with the increase in oper-ating time,and there are problems such as long leaching and transformation operation cycles,and poor process connection.To solve this problem,the research has been conducted on the integrated process of resin saturation readsorption,hydrochloric acid transformation regeneration and water elu-tion.The analysis reveals that resin pollutants mainly contain elements such as Ca,Fe,Al,etc.,and industrial hydrochloric acid can effectively detoxify them.This integrated process utilizes low concen-tration acidic qualified solution to disturb ion exchange equilibrium,promoting the conversion of UO2(CO3)3-to UO2Cl42-and achieving saturation readsorption;the resin is transformed into chlorou-ranyl type and activated with hydrochloric acid transformation;during water washing,as ρ(Cl-)de-creases,UO2Cl42-gradually dissociates into UO22+.The results show that this process increases the resin capacity by more than twice,improves the leaching efficiency by 37％,shortens the operating time by 58.3％,and reduces the cost of hydrometallurgy by 61 700 yuan per ton of uranium,achie-ving the synergistic operation of resin detoxification,regeneration transformation,and uranium leac-hing.The integrated process provides an efficient solution for the"CO2+O2"neutral leaching and uranium hydrometallurgy.