Study on alkali mechanical activation for recovering rare earth from waste fluorescent lamps

doi:10.1016/j.jre.2017.05.016

	Study on alkali mechanical activation for recovering rare earth from waste fluorescent lamps
	He, Ling 1,2; Ji, Wen 1; Yin, Yanwei 1; Sun, Weimin 1,2
刊名	JOURNAL OF RARE EARTHS
	2018-01
卷号	36 期号:1 页码:108-112
关键词	Rare earth Spinel structure Recovery rate Alkali mechanical activation Waste phosphors Rare earths
ISSN号	1002-0721
DOI	10.1016/j.jre.2017.05.016
英文摘要	Recycling of rare earth from waste fluorescent lamps is becoming increasingly important in future sustainable development. However, cerium and terbium are usually difficult to recover due to the stable spinel structure. In the research, alkali mechanical activation was innovatively used to pretreat the waste phosphors for recovering rare earths. The effect of alkali mechanical activation on the structural changes of waste phosphors was explored using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Meanwhile, the effects of different parameters including milling speed, activation time, and amount of alkali on the leaching rates of rare earth were investigated. The rare earth elements recovery rates are observed to increase rapidly, particularly with increases in rotational speed and activation time. Under optimal conditions, the maximum leaching rates of Ce and Tb reach 85.0% and 89.8%, respectively. And the total recovery rates of rare earth reach 95.2%. All the results indicate that alkali mechanical activation can effectively destroy the spinel structure and produce substantial physicochemical changes. These changes lead to the easy dissolution of rare earths in acid solution, and greatly improve the leaching of cerium and terbium. (C) 2018 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths.
资助项目	Lanzhou University of Technology[SKLAB02014010] ; National Natural Science Foundation of China[516744130] ; Natural Science Fund of Gansu Province of China[1508RJZA049]
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000419223200010
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32863]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	He, Ling
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	He, Ling,Ji, Wen,Yin, Yanwei,et al. Study on alkali mechanical activation for recovering rare earth from waste fluorescent lamps[J]. JOURNAL OF RARE EARTHS,2018,36(1):108-112.
APA	He, Ling,Ji, Wen,Yin, Yanwei,&Sun, Weimin.(2018).Study on alkali mechanical activation for recovering rare earth from waste fluorescent lamps.JOURNAL OF RARE EARTHS,36(1),108-112.
MLA	He, Ling,et al."Study on alkali mechanical activation for recovering rare earth from waste fluorescent lamps".JOURNAL OF RARE EARTHS 36.1(2018):108-112.