CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
Leaching of niobium and tantalum from a low-grade ore using a KOH roast-water leach system
Wang, Xiaohui1,2; Zheng, Shili1; Xu, Hongbin1; Zhang, Yi1; Zheng, SL
2009-09-01
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume98Issue:3-4Pages:219-223
AbstractA new process is proposed for the leaching and recovery of niobium and tantalum from a low-grade refractory niobium-tantalum ore after adding pure Nb(2)O(5) to adjust the niobium to tantalum ratio. The ore was roasted and decomposed with KOH then leached with water. Experiments were carried out to study the effect of the Nb(2)O(5)-to-Ta(2)O(5) mass ratio, decomposition temperature, alkali-to-ore mass ratio and decomposition time on the leaching of niobium and tantalum, as well as the associated impurity elements, such as titanium, iron, manganese, silicon and tin. The optimal conditions were determined to be: Nb(2)O(5)-to-Ta(2)O(5) mass ratio 2.33:1; KOH-to-ore mass ratio 2:11; reacting for 60 min at 400 degrees C. Leaching with water extracted -95% Nb and 94% Ta together with about 80% Si and Sn. 50% Ti and <20% Fe and Mn. The niobium and tantalum was recovered as high purity (Nb,Ta)205 (99.3%) through evaporation, crystallization and phase transformation processes. (C) 2009 Elsevier B.V. All rights reserved.
KeywordNiobium-tantalum Ore Alkali Roast Potassium Hydroxide Water Leach
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.hydromet.2009.05.002
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000268439800004
Citation statistics
Cited Times:40[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6592
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorZheng, SL
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xiaohui,Zheng, Shili,Xu, Hongbin,et al. Leaching of niobium and tantalum from a low-grade ore using a KOH roast-water leach system[J]. HYDROMETALLURGY,2009,98(3-4):219-223.
APA Wang, Xiaohui,Zheng, Shili,Xu, Hongbin,Zhang, Yi,&Zheng, SL.(2009).Leaching of niobium and tantalum from a low-grade ore using a KOH roast-water leach system.HYDROMETALLURGY,98(3-4),219-223.
MLA Wang, Xiaohui,et al."Leaching of niobium and tantalum from a low-grade ore using a KOH roast-water leach system".HYDROMETALLURGY 98.3-4(2009):219-223.
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