Hazardous characteristics and transformation mechanism in hydrometallurgical disposing strategy of secondary aluminum dross

doi:10.1016/j.jece.2021.106470

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Hazardous characteristics and transformation mechanism in hydrometallurgical disposing strategy of secondary aluminum dross
	Li, Yong 1,2; Qin, Ziyi 1,3; Li, Chunlei 1; Qu, Yi 4; Wang, Haibin 1; Peng, Li 1; Wang, Yi 1
刊名	Journal of Environmental Chemical Engineering
	2021-12-01
卷号	9 期号:6
关键词	Aluminum hydroxide Aluminum nitride Ammonia Carbides Fluorine compounds Hydrometallurgy Leaching Particle size Active phasis Condition Harmlessness Leaching process Particles sizes Recovery and utilizations Secondary aluminum dross Sustainable Transformation behavior Transformation mechanisms
DOI	10.1016/j.jece.2021.106470
英文摘要	To further understand the transformation behavior of active phase during hydrometallurgical disposal, and then provide theoretical guidance for the recovery and utilization of secondary aluminum dross (SAD) valuable resource, factors affecting the harmlessness efficiency, transformation behavior of active phase and kinetics of the leaching process investigated. The results indicate that harmless residues can be achieved when treated at the conditions of liquid-solid ratio of 5, leaching temperature of 80 , extracting time of 4 h and SAD particle size less than 2000 μm. The capacity of emissing gas, which is composed of small amount of ammonia, methane and dominant proportion of hydrogen, increases with the enlargement of particle size. The small particles with relative high proportion of aluminum carbide and aluminum nitride tend to release more methane and ammonia. During hydrometallurgical process, the active substances generate intermediate phase of aluminum hydroxide spontaneously, cover on the interface of SAD particles, and then react with acidic or alkaline medium. The hydrolysis of active phases and the dissolution of fluoride follow the Avrami-Erofeyev Model and internal diffusion model, respectively, while the rate both of them are all controlled by diffusion. This work is hopeful for providing a deep insight into disposal and comprehensive utilization of SAD. © 2021 Elsevier Ltd
WOS研究方向	Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000707256200002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151102]
专题	石油化工学院
作者单位	1.College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Zhongnan Testing Technology Co., Ltd, Wuhan; 430051, China; 3.Wuchang Polytechnic College, Wuhan; 430202, China; 4.Lanzhou Branch of Aluminum Corporation of China Limited, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Li, Yong,Qin, Ziyi,Li, Chunlei,et al. Hazardous characteristics and transformation mechanism in hydrometallurgical disposing strategy of secondary aluminum dross[J]. Journal of Environmental Chemical Engineering,2021,9(6).
APA	Li, Yong.,Qin, Ziyi.,Li, Chunlei.,Qu, Yi.,Wang, Haibin.,...&Wang, Yi.(2021).Hazardous characteristics and transformation mechanism in hydrometallurgical disposing strategy of secondary aluminum dross.Journal of Environmental Chemical Engineering,9(6).
MLA	Li, Yong,et al."Hazardous characteristics and transformation mechanism in hydrometallurgical disposing strategy of secondary aluminum dross".Journal of Environmental Chemical Engineering 9.6(2021).