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	Kinetics of rare earth leaching from a mangnese-removed weathered rare-earth mud in hydrochloric acid solutions
	Chi, R ; Tian, J ; Zhu, G ; Wu, Y ; Li, S ; Wang, C ; Zhou, ZA
	2010-05-10 ; 2010-05-10
关键词	kinetics leaching hydrochloric acid rare earth rare earth mud ELEMENT PRECIPITATION RECOVERY Chemistry, Multidisciplinary Engineering, Chemical
中文摘要	The kinetics of leaching rare earth from a manganese-removed weathered rare earth mud (MRW-RE mud) in hydrochloric acid solutions was investigated in this study as a function of temperature, particle size, and HCl concentration. It was found that the leaching process can be described by a shrinking-core model, with the apparent activation energy about 10.17 kJ/M. When the concentration of hydrochloric acid was below 4M, the RE leaching rate was controlled by the diffusion of reactants and leaching products through a porous ore. However, when HCl concentration was higher than 4 M, the leaching process was limited by both chemical reaction and reagent diffusion. Based on the experimental results, an empirical equation relating the rate constant of rare earth leaching to the particle size and leaching temperature was established for the purpose of process deign.
语种	英语 ; 英语
出版者	TAYLOR & FRANCIS INC ; PHILADELPHIA ; 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/23138]
专题	清华大学
推荐引用方式 GB/T 7714	Chi, R,Tian, J,Zhu, G,et al. Kinetics of rare earth leaching from a mangnese-removed weathered rare-earth mud in hydrochloric acid solutions[J],2010, 2010.
APA	Chi, R.,Tian, J.,Zhu, G.,Wu, Y.,Li, S.,...&Zhou, ZA.(2010).Kinetics of rare earth leaching from a mangnese-removed weathered rare-earth mud in hydrochloric acid solutions..
MLA	Chi, R,et al."Kinetics of rare earth leaching from a mangnese-removed weathered rare-earth mud in hydrochloric acid solutions".(2010).

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