【摘要】 在流化床中,用三碳酸铀酰铵分解还原制得的UO₂,吸收氢氟化生产UF₄尾气中的HF,在UO₂转化率为60％、床层温度控制在300℃左右的情况下,吸收流化床排放尾气中HF浓度可小于7～8％（重量）,即HF表观过剩系数已降至0％左右。因此,利用三碳酸铀酰铵分解还原生产的UO₂所具有的高氢氟化反应性,采用双级流化床串联气固逆流流动工艺流程,可以大大降低氢氟化工艺中HF过剩量。更多还原

【Abstract】 In a fluidi/ed bed,UO2 obtained from the decomposition-reduction of AUC (Ammonium Uranyl Carbonate) was fed to absorb HF remaining in the exhaust gas of UF4 production process. In the case of QQtyo conversion of UO2 and the reaction temperature in the region of 300t!?HF remaining in the exhaust gas in absorbing fluidized bed was less than 7?%(w/w), i.e. apparent stoichiome?trie excess of HF had reduced to Q% more or less.Hence, with the high hydrofluorination reactivity of UO2 obtained from the decompositioneduction of AUC, it is possible to reduce evidently the stoichiometric excess of HF in the hydrofluorination process by two fluidized beds in series in which solids move against the gas flow.更多还原