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介绍了重铀酸铵(ADU)转化为UO_2粉末过程中的除氟机理、工艺流程及影响UO_2粉末中含氟量的主要因素;并特别指出转炉尾气气固分离设备——金属过滤器的加热温度是ADU转化为UO_2粉末过程中除氟的关键因素;通过试验确定的最佳除氟工艺参数及在此工艺参数下生产的UO_2粉末的含氟量<100μg/g,基体相对密度>96.5％。
In this paper, the defluorination mechanism, technological process and the main factors affecting the content of fluorine in UO_2 powder are introduced in the process of conversion of ammonium uranyl (ADU) to UO_2 powder. In particular, the heat of metal filter The temperature is the key factor to remove fluoride during the conversion of ADU into UO_2 powder. The optimum fluoride removal process parameters and the fluorine content of UO_2 powder <100μg / g, the relative density of matrix> 96.5% .