Leaching Behavior and Kinetics of Ilmenite Ore with NaOH Hydrothermal Method

	Leaching Behavior and Kinetics of Ilmenite Ore with NaOH Hydrothermal Method
	Gao Minglei 1,2; Xue Xiangxin 1; Wang Shaona 3; Li Lanjie 2; Yang He 1; Zhao Beibei 2; Chang Fuzeng 2
刊名	RARE METAL MATERIALS AND ENGINEERING
	2020-05-01
卷号	49 期号:5 页码:1512-1520
关键词	ilmenite ore NaOH hydrothermal method titanium leaching degree leaching behavior kinetics
ISSN号	1002-185X
英文摘要	The leaching behavior and kinetics of ilmenite ore in NaOH hydrothermal system were researched, and an innovative metallurgical process of leaching titanium from ilmenite ore by NaOH hydrothermal method was proposed to overcome the severe dilute H2SO4 waste water pollution of current titanium extraction process in industry. Results that the optimal reaction conditions are as follows: the reaction temperature 240 degrees C, NaOH concentration 400 g.L-1, the mass ratio of alkali to ore 3.5:1, partial oxygen pressure 0.5 MPa, reaction time 2 h, agitation speed 600 r/min, and ore particle size <75 mu m, and the leaching degree of titanium can reach 95%. Based on XRD analyses and SEM microstructure observation, the decomposition behavior of ilmenite ore was investigated and the generating of sodium titanium particles was observed. The producing phenomenon of the product layer is not found during leaching. The leaching kinetics study shows that the leaching rate of ilmenite ore in NaOH hydrothermal system is controlled by the solid product layer diffusion with the apparent activation energy of 47.39 kJ/mol, and the empirical rate equation is "1-2X/3-(1-X)(2/3)=[735.09exp(-47389.8/RT)]t".
资助项目	Natural Science Foundation of Hebei Province[E2017318007] ; Key Program of National Natural Science Foundation of China[U1502273]
WOS关键词	HYDROCHLORIC-ACID ; DECOMPOSITION
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000554635000007
资助机构	Natural Science Foundation of Hebei Province ; Key Program of National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/41635]
专题	中国科学院过程工程研究所
通讯作者	Xue Xiangxin
作者单位	1.Northeastern Univ, Shenyang 110819, Peoples R China 2.HBIS Grp ChengSteel, Chengde 067102, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Gao Minglei,Xue Xiangxin,Wang Shaona,et al. Leaching Behavior and Kinetics of Ilmenite Ore with NaOH Hydrothermal Method[J]. RARE METAL MATERIALS AND ENGINEERING,2020,49(5):1512-1520.
APA	Gao Minglei.,Xue Xiangxin.,Wang Shaona.,Li Lanjie.,Yang He.,...&Chang Fuzeng.(2020).Leaching Behavior and Kinetics of Ilmenite Ore with NaOH Hydrothermal Method.RARE METAL MATERIALS AND ENGINEERING,49(5),1512-1520.
MLA	Gao Minglei,et al."Leaching Behavior and Kinetics of Ilmenite Ore with NaOH Hydrothermal Method".RARE METAL MATERIALS AND ENGINEERING 49.5(2020):1512-1520.