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Study on the denitrogenization kinetics of uranium during electron beam cold hearth refining
Chen, B.1; Du, Z. H.1; Liu, K.1; Zhang, X. J.2; Wang, Z. H.2
Corresponding AuthorChen, B.(bchen@imr.ac.cn)
2020-02-01
Source PublicationVACUUM
ISSN0042-207X
Volume172Pages:6
AbstractAn investigation of kinetics of release of nitrogen from uranium melt were carried out under pressure of less than 0.01Pa via electron beam cold hearth refining. The results indicated that electron beam smelting was an effective purifacation method to reduce nitrogen, the nitrogen decreased sharply to be 10% of initial after 60 min refining. The nitrogen removal rate is first order with respect to nitrogen content in the melt, and the release process is controlled by nitrogen transfer in liquid diffusion layer. The mass transfer coefficient was determined, and the values were estimated to be 0.82 x 10(-5) m s(-1) and 1.40 x 10(-5) m s(-1) at 1940 degrees C and 2320 degrees C, respectively. The release of denitrogenation increased with melt temperature, and apparent activation energy of the release was calculated to be 68 kJ mol(-1) from Arrhenius type equation.
KeywordUranium Electron beam cold hearth refining Denitrogenation Dynamics
DOI10.1016/j.vacuum.2019.109014
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000509788900011
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137240
Collection中国科学院金属研究所
Corresponding AuthorChen, B.
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.China Acad Engn Phys, Mianyang 621900, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Chen, B.,Du, Z. H.,Liu, K.,et al. Study on the denitrogenization kinetics of uranium during electron beam cold hearth refining[J]. VACUUM,2020,172:6.
APA Chen, B.,Du, Z. H.,Liu, K.,Zhang, X. J.,&Wang, Z. H..(2020).Study on the denitrogenization kinetics of uranium during electron beam cold hearth refining.VACUUM,172,6.
MLA Chen, B.,et al."Study on the denitrogenization kinetics of uranium during electron beam cold hearth refining".VACUUM 172(2020):6.
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