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The process of vanadium migration and silicon extraction by alkaline leaching from high silicon stone coal under reduction conditions
Wu, Hao1,2; Feng, Yali1; Zhang, Heng1; Li, Haoran2
2019-04-10
Source PublicationMETALLURGICAL RESEARCH & TECHNOLOGY
ISSN2271-3646
Volume116Issue:3Pages:7
AbstractIt is difficult to utilize stone coal with a vanadium grade of below 0.7%. With the aim of effectively utilizing the silicon and vanadium in stone coal, the vanadium concentration and silicon extraction processes by alkaline leaching under reducing conditions were investigated. The effect of NaOH mass fraction, temperature and the amount of hydrazine hydrate on the leaching process was researched. Moreover, the laws of phase transformation and the migration process of vanadium were revealed. The results show that the dissolution of quartz resulted in the exposure of muscovite and goldmanite, but the phase of muscovite and goldmanite was not damaged. Under the optimal operation conditions (25% mass fraction of NaOH, liquid-solid ratio 2:1 at 200 degrees C for 4 hours), 90.14% of silicon was removed. At the same time, the modulus of sodium silicate product reached 1.88 and the content of V2O5 enriched from 0.5% to 2.51%. In addition, V(IV) was partially reduced to V(III) by adding hydrazine hydrate in an amount of 10% by mass. V(IV) migrated from the liquid phase to the alkali leaching slag, and the recovery of vanadium increased from 89.48% to 94.43%. All the obtained results suggest an efficient process for separation and extraction of vanadium and silicon.
Keywordstone coal silicon extraction vanadium phase vanadium migration reduction conditions
DOI10.1051/metal/2018101
Language英语
WOS KeywordTECHNOLOGY
Funding ProjectMajor Science and Technology Program for Water Pollution Control and Treatment[2015ZX07205-003] ; China Ocean Mineral Resources Research and Development Program[DY125-15-T-08]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationMajor Science and Technology Program for Water Pollution Control and Treatment ; China Ocean Mineral Resources Research and Development Program
WOS IDWOS:000464059100005
PublisherEDP SCIENCES S A
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28245
Collection中国科学院过程工程研究所
Corresponding AuthorFeng, Yali
Affiliation1.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Key State Lab Biochem Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wu, Hao,Feng, Yali,Zhang, Heng,et al. The process of vanadium migration and silicon extraction by alkaline leaching from high silicon stone coal under reduction conditions[J]. METALLURGICAL RESEARCH & TECHNOLOGY,2019,116(3):7.
APA Wu, Hao,Feng, Yali,Zhang, Heng,&Li, Haoran.(2019).The process of vanadium migration and silicon extraction by alkaline leaching from high silicon stone coal under reduction conditions.METALLURGICAL RESEARCH & TECHNOLOGY,116(3),7.
MLA Wu, Hao,et al."The process of vanadium migration and silicon extraction by alkaline leaching from high silicon stone coal under reduction conditions".METALLURGICAL RESEARCH & TECHNOLOGY 116.3(2019):7.
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