主要介绍了流化床一步脱硝还原制备的二氧化铀、混合铀氧化物和流化床脱硝制备的三氧化铀的同时还原氢氟化。提出了一种在氢氟化过程中同时进行氨还原改善脱硝产品氢氟化反应性的方法,以便生产出高品位的四氟化铀。实验证明,在此工艺中应用一步半法生产的混合铀氧化物可制备高品位的四氟化铀。在某些条件下,此法也可以改善一步法生产的二氧化铀的反应性。 This paper mainly introduces the simultaneous hydrofluorination of uranium dioxide prepared by one-step reduction of fluidized bed, uranium dioxide, mixed uranium oxide and uranium trioxide prepared by fluidized bed denitration. A method for simultaneously improving the hydrofluorination reactivity of denitration products during the hydrofluorination process is proposed to produce high-grade uranium tetrafluoride. Experiments show that in this process using a one-and-a-half production of mixed uranium oxide can be prepared high-grade uranium tetrafluoride. Under certain conditions, this method can also improve the reactivity of uranium dioxide produced by one-step process.