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An efficient method of chromium extraction from chromium-containing slag with a high silicon content
Yu, Kai-ping1,2,3; Chen, Bo3; Zhang, Hong-ling1,2; Zhu, Guang-jin1,2; Xu, Hong-bin1,2; Zhang, Yi1,2
2016-06-01
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume162Issue:JUNEPages:86-93
AbstractAn efficient process was proposed for extracting chromium from chromium-containing slag after desilication with aqueous NaOH solution. The effect of the NaOH concentration, liquid-to-solid mass ratio, and leaching temperature on the leaching rate of silicon was investigated. The results showed that 83.78% of the silicon, 41.87% of the aluminum, and 46.42% of the vanadium were removed from the slag under suitable conditions. The kinetic analysis results showed that the leaching rate of silicon is controlled by a chemical reaction under two regimes due to the two silicon-bearing minerals presented in the slag. The first stage is limited by the reaction between NaOH and SiO2, whereas the second stage is subject to the reaction between NaOH and 2MgO center dot 2Al(2)O(3)center dot 5SiO(2). The corresponding apparent activation energies were calculated to be 67.27 kJ/mol and 35.82 kJ/mol, respectively. The extraction rate of chromium from the leaching residue using lime-free roasting reached 98.41%, which was highly superior to the 9.85% obtained from the slag without desilication. (C) 2016 Elsevier B.V. All rights reserved.
KeywordChromium-containing Slag Desilication Kinetics Lime-free Roasting
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.hydromet.2016.02.020
Indexed BySCI
Language英语
WOS KeywordVANADIUM ; FLOTATION ; IRON ; COLLECTOR ; ORES
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China(11204304 ; National Basic Research Program (973 Program) of China(2013CB632600) ; National High-tech Research and Development Program of China(2011AA060702) ; 21376251 ; 21406233)
WOS IDWOS:000376544300012
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21089
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Fuzhou Univ, Coll Zijin Min, Fuzhou 350108, Fujian, Peoples R China
Recommended Citation
GB/T 7714
Yu, Kai-ping,Chen, Bo,Zhang, Hong-ling,et al. An efficient method of chromium extraction from chromium-containing slag with a high silicon content[J]. HYDROMETALLURGY,2016,162(JUNE):86-93.
APA Yu, Kai-ping,Chen, Bo,Zhang, Hong-ling,Zhu, Guang-jin,Xu, Hong-bin,&Zhang, Yi.(2016).An efficient method of chromium extraction from chromium-containing slag with a high silicon content.HYDROMETALLURGY,162(JUNE),86-93.
MLA Yu, Kai-ping,et al."An efficient method of chromium extraction from chromium-containing slag with a high silicon content".HYDROMETALLURGY 162.JUNE(2016):86-93.
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