Pre-treatment method for uranium dioxide raw material for MOX

The invention relates to a pre-treatment method for a uranium dioxide raw material for MOX. The pre-treatment method comprises: selecting a uranium oxide raw material, selecting a corresponding sintering boat, uniformly paving the uranium dioxide raw material into the sintering boat, introducing dried air (Ar-1%H2 to Ar-10%H2) into a sintering furnace at a speed of 0.4-23.4 L/h, slowly increasingthe temperature in the sintering furnace to 45-200 DEG C at a heating rate of 3-21 DEG C/min, carrying out thermal insulation for 1-48 h, and cooling the temperature of the sintering furnace to a roomtemperature at a rate of 3-20 DEG C/min. According to the present invention, the pre-treatment method has characteristics of simple technology and easy achieving, and can be safely and reliably usedin the pre-treatment of the uranium dioxide raw material for MOX. 种MOX用二氧化铀原料预处理方法，包括：选取氧化铀原料、选择相应的烧结舟、将二氧化铀原料均匀平铺至步骤二的烧结舟中、以0.4～23.4L/h的速度对煅烧炉内通入Ar-1％H～Ar-10％H的干燥空气、将煅烧炉内的温度，以3～21℃/min的升温速率缓慢升温至45～200℃，保温1～48h、以3～20℃/min的速率将煅烧