摘要
以生产采区7个地浸单元为例,对蒙其古尔铀矿床CO_2+O_2地浸浸出过程进行了分析。结果表明,450~600mg/L的CO_2用量能够有效调节地浸体系pH以控制碳酸钙饱和沉淀,并能产生浸铀所需HCO_3^-;200~300mg/L的O_2对该矿层氧化效果明显,并可将SO_4^(2-)浓度控制在较低水平,有效避免产生硫酸钙沉淀;浸出液铀浓度与矿化条件和地浸单元注抽比均呈显著的相关关系。CO_2+O_2浸出工艺适合该矿床地浸生产。
Uranium leaching process of CO2＋O2 in-situ leaching for seven leaching units at Mengqiguer deposit was analyzed. The results show that 450-600 mg/L of CO2 can not only control pH value at reasonable level to prevent calcium carbonate precipitation, but also produce enough HCO3^- for uranium leaching. With obvious effect on oxidizing of ore deposit, oxygen with content of 200-300 mg/L controls SO4^2- at a lower content to avoid calcium sulfate precipitation. The resolved uranium is in positive correlation with mineralization conditions and ratio of injection rate to production rate in each leaching unit. CO2＋O2 leaching technology is suitable for uranium in-situ leaching of the deposit under study.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2018年第3期55-59,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
国家自然科学基金资助项目(41572231)
国家重点基础研究发展计划(973)项目(2015CB453002)
关键词
砂岩型铀矿
CO2+O2地浸
化学堵塞
影响因素
sandstone type uranium deposit
CO2＋O2 in-situ leaching
chemical blocking
influence factors
