Kinetics of decomposition of mullite and corundum in coal fly ash under highly alkaline condition

doi:10.1016/S1003-6326(19)64997-6

	Kinetics of decomposition of mullite and corundum in coal fly ash under highly alkaline condition
	Liu, Chun-li 1,2; Ma, Shu-hua 1; Ding, Jian 1; Lu, Yang 1,2; Zheng, Shi-li 1; Zhang, Yi 1
刊名	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
	2019-04-01
卷号	29 期号:4 页码:868-875
关键词	coal fly ash mullite corundum decomposition kinetics alumina
ISSN号	1003-6326
DOI	10.1016/S1003-6326(19)64997-6
英文摘要	Decomposition kinetics of mullite and corundum in coal fly ash with highly alkaline solution was studied. The effects of the reaction temperature and reaction time on decomposition rates of mullite and corundum and alumina extraction efficiency were investigated. The results show that increasing reaction temperature and reaction time increases the decomposition rates of mullite and corundum and alumina extraction efficiency, with the decomposition temperature of mullite lower than that of corundum. After 90 min reaction at 220 degrees C, more than 100 g alumina was extracted when recycling 1 L of alkaline solution. The decomposition processes of mullite and corundum corresponded with the shrinking unreacted core model, and the reaction rate was under chemical reaction control, with the activation energies of mullite and corundum being 67.46 and 161.82 kJ/mol, respectively.
资助项目	National Basic Research Program of China[2013CB632601]
WOS关键词	EXTRACTING ALUMINA ; HEAVY-METALS ; SULFATE ; ACID ; TRANSFORMATION ; TEMPERATURE ; DIFFRACTION ; RECOVERY ; SODALITE ; SOIL
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000467090500021
资助机构	National Basic Research Program of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/28259]
专题	中国科学院过程工程研究所
通讯作者	Ma, Shu-hua
作者单位	1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Chun-li,Ma, Shu-hua,Ding, Jian,et al. Kinetics of decomposition of mullite and corundum in coal fly ash under highly alkaline condition[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2019,29(4):868-875.
APA	Liu, Chun-li,Ma, Shu-hua,Ding, Jian,Lu, Yang,Zheng, Shi-li,&Zhang, Yi.(2019).Kinetics of decomposition of mullite and corundum in coal fly ash under highly alkaline condition.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,29(4),868-875.
MLA	Liu, Chun-li,et al."Kinetics of decomposition of mullite and corundum in coal fly ash under highly alkaline condition".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 29.4(2019):868-875.