The method for preparing powder of uranium dioxide by uranium hexafluoride

With uranium hexafluoride (UF 6 ) preparation uranium dioxide (UO 2 ) method comprise that (1) makes UF 6 Gas and steam reaction also are controlled at predetermined 200-700 ℃ with temperature and fluoridize uranyl (UO to form at least a being selected from 2 F 2 ) and O/U than the solid uranium compound of the uranium oxide of (oxygen/uranium atom than) 2.7-3; (2) with this compound dissolution in water or nitric acid to form the uranyl aqueous solution; (3) this solution and ammonia react are formed ammonium diuranate (ADU) precipitation; (4) filter this precipitation; (5) dry should the precipitation; (6) this is drying precipitated, (7) reduce this roasting precipitation in roasting, controls UO thus 2 The characteristic of powder.