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Green and efficient pre-concentration of niobium from low-grade niobite via super gravity
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Lan, Xi, Gao, Jintao, Li, Zushu, Li, Xiang and Guo, Zhancheng (2023) Green and efficient pre-concentration of niobium from low-grade niobite via super gravity. Metallurgical and Materials Transactions B, 54 . pp. 2095-2104. doi:10.1007/s11663-023-02818-0 ISSN 1073-5615.
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WRAP-Green-efficient-pre-concentration-niobium-low-grade-niobite-super-gravity-23.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only until 19 May 2024. Contact author directly, specifying your specific needs. - Requires a PDF viewer. Download (9Mb) |
Official URL: http://doi.org/10.1007/s11663-023-02818-0
Abstract
Bayan Obo ore, located in Baotou China, is the second largest niobium (Nb) deposit in the world. However, mining of niobium from this ore has not yet been established industrially due to its extremely low niobium content and complex mineral properties. In this study, an efficient pre-concentration technique of super gravity was proposed to increase the grade purity of Nb in the low-grade niobite to an acceptable metallurgical mineral grade. Firstly, the transformation behavior of iron-bearing phases and the present morphology of niobium during the selective reduction process were systematically investigated, and the optimum reduction conditions for the maximum enrichment of niobium into the slag were considered. Subsequently, complete separation of Nb-rich slag and metallic iron was achieved via super gravity at low temperature, the niobium slag with a grade of 4.05 wt pct was acquired at 1200 °C and G = 1000, which was four times higher than that in the initial ore, and the recovery ratios of MFe and Nb2O5 were high up to 94.29 and 97.62 pct, respectively. This research developed a green pre-concentration technology for upgrading low-grade Nb minerals and facilitating the subsequent employment of hydrometallurgical separation techniques.
Item Type: | Journal Article | |||||||||
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Subjects: | Q Science > QD Chemistry | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
Library of Congress Subject Headings (LCSH): | Niobium, Niobium -- Industrial applications, Niobium -- Environmental aspects, Supergravity | |||||||||
Journal or Publication Title: | Metallurgical and Materials Transactions B | |||||||||
Publisher: | Springer New York LLC | |||||||||
ISSN: | 1073-5615 | |||||||||
Official Date: | August 2023 | |||||||||
Dates: |
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Volume: | 54 | |||||||||
Page Range: | pp. 2095-2104 | |||||||||
DOI: | 10.1007/s11663-023-02818-0 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Reuse Statement (publisher, data, author rights): | “This version of the article has been accepted for publication, after peer review (when applicable) but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://doi.org/10.1007/s11663-023-02818-0. Use of this Accepted Version is subject to the publisher’s Accepted Manuscript terms of use https://www.springernature.com/gp/open-research/policies/acceptedmanuscript-terms”." | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Date of first compliant deposit: | 13 June 2023 | |||||||||
RIOXX Funder/Project Grant: |
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