CO_2+O_2地浸采铀饱和树脂酸化技术与应用

Technology and Application of Acidified Saturated Resin in CO_2+O_2 In-situ Leach Uranium Mine

介绍了CO_2+O_2地浸采铀和酸法地浸采铀的水冶回收工艺,依据新疆某地浸铀矿山的铀矿水冶工艺现状,提出将CO_2+O_2地浸采铀工艺下饱和树脂纳入酸法地浸水冶回收系统进行处理的酸化工艺。分析了CO_2+O_2浸出工艺下碳酸铀酰型饱和树脂的酸化转化机理,开展了以酸法水冶系统中淋洗剂、转型剂、洗涤合格液为酸化剂的搅拌浸泡试验。结果表明,酸法水冶系统中的洗涤合格液是符合工艺要求的酸化剂,可充分利用洗涤合格液中的剩余酸度对碳酸铀酰型饱和树脂进行转化,并将转化后树脂对铀的吸附容量由74.71 g/L提高至76.73 g/L,实现了与酸法水冶系统再饱和树脂的共同淋洗和转型。

Firstly,the recovery process of CO2+O2 in-situ leaching metallurgy and acid in-situ leaching metallurgy was introduced.According to the status of the uranium process in a distributed uranium mine in Xinjiang,the acidification process was put forward to take the saturated resin under the CO2+O2 leaching process into the acid leaching recovery system.Then,the acidification mechanism of uranyl carbonate saturated resin under the CO2+O2 leaching process was analyzed.The acidification tests were carried out with the eluent agent,transition agent and pregnant liquid as acidification agent.The results show that the pregnant liquid is a suitable acidifier which meets the requirements of the technique.The residual acidity in the pregnant liquid was used to acidize the uranyl carbonate saturated resin,and the adsorption capacity of resin for uranium increases from 74.71 g/L to 76.73 g/L.It is realized that the saturated resin in CO2+O2 leaching process and the re-saturated resin in acid leaching process are eluted and transited together.