微波煅烧重铀酸铵制备U_3O_8工艺研究  

Technology to Prepare for U_3O_8 by Calcinations From Ammonium Diuranate in Microwave Fields

作　　者：刘秉国[1,2] 彭金辉[1,2] 黄代富 张利波[1,2] 胡锦明 张泽彪[1,2] 孔冬成 郭胜惠[1,2] 李春湘 

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]昆明理工大学非常规冶金教育部重点实验室,云南昆明650093 [3]中核集团二七二铀业有限公司,湖南衡阳421002

出　　处：《原子能科学技术》2011年第5期523-527,共5页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(50734007);云南省科技计划资助项目(2007GA002);昆明理工大学分析测试基金资助项目(2008-16)

摘　　要：基于重铀酸铵在微波场中的升温特性,研究了微波煅烧重铀酸铵制备八氧化三铀的新工艺。探讨了微波功率、微波加热时间及物料量等因素对八氧化三铀产品中总铀和U4+含量的影响规律。研究结果表明,微波功率和微波加热时间对八氧化三铀产品中总铀和U4+含量的影响显著。在本实验范围内,微波煅烧重铀酸铵制备八氧化三铀的最佳工艺条件为:微波功率700W,微波加热时间10min,物料量60g。在最佳工艺条件下,八氧化三铀产品中总铀和U4+含量分别为84.62%和28.74%,其产品质量满足后续工序要求。微波煅烧重铀酸铵制备八氧化三铀是可行的。Base on the temperature rise characteristics,the technology to prepare for U3O8 by calcinations from ammonium diuranate was optimized in microwave fields.The effects of microwave heating power,heating time,and mass of sample on the contents of total uranium and U4＋ in U3O8 were investigated.The results show that microwave heating power and heating time significantly affect the contents of total uranium and U4＋ in U3O8.The optimal calcination conditions in range of experiments are as follows： Microwave heating power is 700 W,heating time is 10 min and mass is 60 g.Under these conditions the contents of total uranium and U4＋ in U3O8 are 84.62% and 28.74%,respectively.The quality of products meets the demand of next procedure.It is feasible to prepare for U3O8 by calcination from the ammonium diurante in microwave fields.

关 键 词：微波 重铀酸铵 升温特性 煅烧 八氧化三铀 

分 类 号：TL213.2[核科学技术—核燃料循环与材料]