某高耗酸砂岩型铀矿床碱法地浸采铀试验研究  

Alikaline In-situ Leaching of Uranium in High-acid-consumption Sandstone-type Uranium Deposit

作　　者：邢拥国 蒋小辉 霍建党[3] 刘金辉[1] 

机构地区：[1]东华理工大学水资源与环境工程学院,江西南昌330013 [2]中核内蒙古矿业有限公司,内蒙古呼和浩特010000 [3]核工业北京化工冶金研究院,北京101149

出　　处：《湿法冶金》2017年第6期467-472,共6页Hydrometallurgy of China

摘　　要：研究了某高耗酸砂岩型铀矿床碱法地浸采铀。碱法浸出分矿层预氧化、CO_2+O_2中性浸出及CO_2+O_2+NH_4HCO_3浸出3个阶段。试验结果表明:在矿层预氧化基础上,浸出液铀质量浓度随浸出剂中HCO_3^-质量浓度提高而升高,最佳HCO_3^-质量浓度为800mg/L;HCO_3^-是控制浸出液铀质量浓度的关键因素,O2将U4+氧化为U6+,CO_2既可提供HCO_3^-,又可调节浸出剂pH;浸出过程顺利,浸出效果较好,生产成本低,可有效回收砂岩型铀矿床中的铀。The alkaline in-situ leaching of uranium in a high-acid-consumption sandstone type uranium deposit was carried out.The process is consisted of three stages with ore pre-oxidation,CO2＋O2 leaching and CO2 ＋ O2 ＋ NH4 HCO3 leaching stage.The test results show that the uranium concentration in leaching solution is increased with the HCO3^- concentration in leaching agent based on the preoxidation.The best HCO3^- concentration in leaching agent is 800 mg/L.The HCO3^- is a key factor for controlling concentration of uranium in leaching solution,O2 is an oxidant to oxidize U4＋to U6＋.CO2 not only provide HCO3^-,but also adjust the pH of leaching agent.The process is suitable for in-situ leaching of uranium from high acid consumption uranium deposit,and can recovery uranium with good effective and low cost.

关 键 词：高耗酸 矿床 铀 碱法地浸 

分 类 号：TL212[核科学技术—核燃料循环与材料]