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Co-extraction of vanadium and chromium from high chromium containing vanadium slag by low-pressure liquid phase oxidation method
Wu, Kanghua1,2,3; Wang, Yaru2,4; Wang, Xinran2; Wang, Shaona2; Liu, Biao2; Zhang, Yi1,2,3; Du, Hao2,4
2018-12-01
Source PublicationJOURNAL OF CLEANER PRODUCTION
ISSN0959-6526
Volume203Pages:873-884
Abstract

High chromium containing vanadium slag is refractory, and therefore cannot be processed efficiently by traditional roasting method. In this study, a low pressure leaching process using NaOH solution to co-extract both vanadium and chromium has been proposed. The effects of NaOH concentration, leaching temperature, oxygen pressure, and liquid-to-solid mass ratio on the vanadium and chromium leaching rate were discussed in detail. The results suggested that the NaOH concentration and leaching temperature were more influential factors for the extraction of vanadium and chromium. Under the optimal reaction conditions (temperature 200 degrees C, liquid-to-solid mass ratio of 6:1, NaOH mass concentration of 50%, agitation speed 700 rpm, pressure of 1 MPa, and reaction time 180 min), the recoveries of vanadium and chromium could reach up to 98.3% and 93.3%, respectively. The kinetics study indicated that the dissolution process of vanadium slag followed the shrinking core model, and the extraction of vanadium and chromium were both governed by the internal diffusion control. Furthermore, the apparent activation energies for the oxidation of vanadium and chromium were calculated to be 27.58 and 36.74 kJ/mol, respectively. The result from this study provides insights on effectively co-extracting V and Cr from high Cr-containing vanadium slag while minimizing the environmental contamination. (C) 2018 Elsevier Ltd. All rights reserved.

KeywordVanadium Slag High Chromium Liquid Oxidation Pressure Leaching
DOI10.1016/j.jclepro.2018.08.288
Language英语
WOS KeywordAcid Leaching Process ; Sulfuric-acid ; Extraction ; Kinetics ; Decomposition ; Dissolution ; Recovery ; Cleaner ; System ; Steel
Funding ProjectNational Natural Science Foundation of China[51774261] ; National Natural Science Foundation of China[91634111] ; Sino-German Collaboration Project[51761135108]
WOS Research AreaScience & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
WOS SubjectGreen & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences
Funding OrganizationNational Natural Science Foundation of China ; Sino-German Collaboration Project
WOS IDWOS:000447568700069
PublisherELSEVIER SCI LTD
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/26298
Collection中国科学院过程工程研究所
Corresponding AuthorDu, Hao
Affiliation1.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Natl Engn Res Ctr Distillat Technol, Tianjin 300072, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100149, Peoples R China
Recommended Citation
GB/T 7714
Wu, Kanghua,Wang, Yaru,Wang, Xinran,et al. Co-extraction of vanadium and chromium from high chromium containing vanadium slag by low-pressure liquid phase oxidation method[J]. JOURNAL OF CLEANER PRODUCTION,2018,203:873-884.
APA Wu, Kanghua.,Wang, Yaru.,Wang, Xinran.,Wang, Shaona.,Liu, Biao.,...&Du, Hao.(2018).Co-extraction of vanadium and chromium from high chromium containing vanadium slag by low-pressure liquid phase oxidation method.JOURNAL OF CLEANER PRODUCTION,203,873-884.
MLA Wu, Kanghua,et al."Co-extraction of vanadium and chromium from high chromium containing vanadium slag by low-pressure liquid phase oxidation method".JOURNAL OF CLEANER PRODUCTION 203(2018):873-884.
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