| 摘要 |
Method for obtaining uranium trioxyde of high reactivity by thermal denitration of hydrated uranyl nitrate having the formula UO2(NO3)2, xH2O, wherein 2 < x < 6, characterized in that said uranyl nitrate is subjected in its solid form to a heat treatment whereby the uranyl nitrate is heated from an initial temperature, always lower than its melting temperature, to a final temperature of at least 260<o>C, by conducting the treatment in such a way that the instant product temperature is always lower than the melting temperature corresponding to its instantaneous composition and that the partial pressure of the water steam in the treatment housing is at the most equal to 65 millimeters of mercury. Said method is particularly interesting to obtain UO3 of high reactivity. |
