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Kinetics analysis of decomposition of vanadium slag by KOH sub-molten salt method
Liu, Hui-bin1,2,3; Du, Hao1; Wang, Da-wei4; Wang, Shao-na1; Zheng, Shi-li1; Zhang, Yi1
2013-05-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume23Issue:5Pages:1489-1500
AbstractA novel process was developed for the decomposition of vanadium slag using KOH sub-molten salt under ambient pressure, and the effects of reaction temperature, alkali-to-ore mass ratios, particle size, and stirring speed on vanadium and chromium extraction were studied. The results suggest that the reaction temperature and KOH-to-ore mass ratio are more influential factors for the extraction of vanadium and chromium. Under the optimal reaction conditions (temperature 180 degrees C, initial KOH-to-ore mass ratio 4:1, stirring speed 700 r/min, gas flow 1 L/min, and reaction time 300 min), vanadium and chromium extraction rates can reach up to 95% and 90%, respectively. Kinetics analysis results show that the decomposing process of vanadium slag in KOH sub-molten salt can be well interpreted by the shrinking core model under internal diffusion control. The apparent activation energies for vanadium and chromium are 40.54 and 50.27 kJ/mol, respectively.
KeywordVanadium Slag Spinel Sub-molten Salt Method Kinetics Analysis Decomposition Activation Energy
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
Language英语
WOS Keyword80 DEGREES-C ; SOLUBILITY ; CHROMITE ; SYSTEM ; DIFFUSION ; OXYGEN
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000324003300037
Citation statistics
Cited Times:40[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13629
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.China ENFI Engn Corp, Beijing 100038, Peoples R China
4.China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Liu, Hui-bin,Du, Hao,Wang, Da-wei,et al. Kinetics analysis of decomposition of vanadium slag by KOH sub-molten salt method[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2013,23(5):1489-1500.
APA Liu, Hui-bin,Du, Hao,Wang, Da-wei,Wang, Shao-na,Zheng, Shi-li,&Zhang, Yi.(2013).Kinetics analysis of decomposition of vanadium slag by KOH sub-molten salt method.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,23(5),1489-1500.
MLA Liu, Hui-bin,et al."Kinetics analysis of decomposition of vanadium slag by KOH sub-molten salt method".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 23.5(2013):1489-1500.
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