反加料方式制备AUC的工艺研究  

Study on Preparation of AUC by Means of Contrary Feeding

作　　者：许奎[1] 刘锦洪[1] 胡柏贵[1] 雷茂林[1] 崔川江[1] 

机构地区：[1]中国核动力研究设计院核燃料及材料国家重点实验室,成都610041

出　　处：《核动力工程》2007年第4期63-65,共3页Nuclear Power Engineering

摘　　要：介绍了用NH3和CO2气作为沉淀剂,以反加料方式制备(NH4)4[UO2(CO3)3](AUC)的工艺研究。具体研究了反应温度、料液铀浓度、UF6水解液的加入速度等参数对反加料工艺制备AUC晶体的影响。试验表明:控制反应温度在60～70℃、料液铀浓度在200g/L、UF6水解液流量在40 L/h的条件下制得的AUC晶体氟含量低于1000μg/g,松装密度在0.8g/cm3～1.0g/cm3之间,具有很好的流动性。The precipitation of ammonium uranyl carbonate （AUC） use NH3 and CO2 gas by the contrary feeding method is investigated in this report. The influences factor such as reaction temperature, feed concentration, feeding speed has been studied. The experiment shows that controlling the reaction temperature in 60℃ - 70℃, feed concentration in 200g/L, feeding speed in 40L/h is feasible. The fluorine content of AUC crystal is under 1000/ag/g, the bulk density of AUC is in 0.8 g/cm^3 - 1.0g/cm^3, and it has the excellent flowability.

关 键 词：AUC UO2粉末 结晶 沉淀 

分 类 号：TL362.3[核科学技术—核技术及应用]