CAS OpenIR
Leaching Behavior and Kinetics of Ilmenite Ore with NaOH Hydrothermal Method
Gao Minglei1,2; Xue Xiangxin1; Wang Shaona3; Li Lanjie2; Yang He1; Zhao Beibei2; Chang Fuzeng2
2020-05-01
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume49Issue:5Pages:1512-1520
AbstractThe 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".
Keywordilmenite ore NaOH hydrothermal method titanium leaching degree leaching behavior kinetics
Language英语
WOS KeywordHYDROCHLORIC-ACID ; DECOMPOSITION
Funding ProjectNatural Science Foundation of Hebei Province[E2017318007] ; Key Program of National Natural Science Foundation of China[U1502273]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNatural Science Foundation of Hebei Province ; Key Program of National Natural Science Foundation of China
WOS IDWOS:000554635000007
PublisherNORTHWEST INST NONFERROUS METAL RESEARCH
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/41636
Collection中国科学院过程工程研究所
Corresponding AuthorXue Xiangxin
Affiliation1.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
Recommended Citation
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.
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