Study on the denitrogenization kinetics of uranium during electron beam cold hearth refining

doi:10.1016/j.vacuum.2019.109014

IMR OpenIR

	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
通讯作者	Chen, B.(bchen@imr.ac.cn)
	2020-02-01
发表期刊	VACUUM
ISSN	0042-207X
卷号	172 页码:6
摘要	An 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.
关键词	Uranium Electron beam cold hearth refining Denitrogenation Dynamics
DOI	10.1016/j.vacuum.2019.109014
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000509788900011
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/137243
专题	中国科学院金属研究所
通讯作者	Chen, B.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.China Acad Engn Phys, Mianyang 621900, Sichuan, Peoples R China
推荐引用方式 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.