Preparation of U3O8 by calcination from ammonium uranyl carbonate in microwave fields Process optimization》.pdfVIP

Annals of Nuclear Energy 85 (2015) 879–884 Contents lists available at ScienceDirect Annals of Nuclear Energy journal homepage: www.elsevi /locate/anucene Preparation of U O by calcination from ammonium uranyl carbonate 3 8 in microwave fields: Process optimization Liu Bing-Guo a,b, Peng Jin-Hui a,b,⇑, C. Srinivasakannan d, Zhang Li-Bo a,b, Hu Jin-Ming c, Guo Sheng-Hui a,b, Kong Dong-Cheng c a State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China b Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, PR China c No. 272, Nuclear Industry Factory, China National Nuclear Corporation, Hengyang 421002, PR China d Chemical Engineering Department, The Petroleum Institute, Abudhabi, United Arab Emirates a r t i c l e i n f o a b s t r a c t Article history: The effects of process conditions on preparation of U O by calcination from ammonium uranyl carbonate 3 8 Received 3 September 2014 in microwave fields were assessed and optimized for maximizing the total uranium as well as calcination Received in revised form 26 June 2015 temperature, adopting as Central Composite Design (CCD) methodology. The process variables assessed Accepted 1 July 2015 were calcination temperature, calcination duration and mass of sample. A quadratic model relating t