反加料方式制备AUC的工艺研究

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Study on Preparation of AUC by Means of Contrary Feeding

National Key Laboratory for Nuclear Fuel and Materials, Nuclear Powder Institute of China, Chengdu, 610041, China

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。
- AUC /
- UO₂粉末 /
- 结晶 /
- 沉淀
Abstract: 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 1000μg/g,the bulk density of AUC is in 0.8 g/cm³～1.0g/cm³,and it has the excellent flow-ability.
- AUC /
- UO₂ Powder /
- Crystal /
- Precipitation