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Liu, L., Kauppinen, T., Tynjälä, P., Hu, T., & Lassi, U. (2023). Water leaching of roasted vanadium slag: Desiliconization and precipitation of ammonium vanadate from vanadium solution. Hydrometallurgy, 215, 105989. https://doi.org/10.1016/j.hydromet.2022.105989

Water leaching of roasted vanadium slag : desiliconization and precipitation of ammonium vanadate from vanadium solution

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Author: Liu, Longjie1; Kauppinen, Toni1,2; Tynjälä, Pekka1,2;
Organizations: 1University of Oulu, Research unit of Sustainable Chemistry, PO Box 4300, FI-90570 Oulu, Finland
2University of Jyvaskyla, Kokkola University Consortium Chydenius, Talonpojankatu 2B, FI-67100 Kokkola, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.9 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2023032032513
Language: English
Published: Elsevier, 2023
Publish Date: 2023-03-20
Description:

Abstract

This research investigated water leaching of roasted vanadium slag and studied the effects of leaching parameters, such as agitation speed, temperature, liquid-to-solid ratio, and leaching time. Further, solution purification via desiliconization and precipitation of ammonium vanadate were studied using the vanadium solution obtained from the water leaching of roasted vanadium slag. Vanadium solution contains residual silicon (1.67 g/L), which should be removed before ammonium vanadate precipitation. Based on the results, vanadium can be effectively recovered from vanadium slag and a recovery efficiency of 96.9% was obtained under optimal water leaching conditions. During solution purification, silicon can be precipitated with Al2(SO4)3 to very low levels without any significant vanadium loss. The ammonium vanadate precipitation achieved a high precipitation efficiency of >99%.

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Series: Hydrometallurgy
ISSN: 0304-386X
ISSN-E: 1879-1158
ISSN-L: 0304-386X
Volume: 215
Article number: 105989
DOI: 10.1016/j.hydromet.2022.105989
OADOI: https://oadoi.org/10.1016/j.hydromet.2022.105989
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
Subjects:
Desiliconization
Precipitation
Vanadate
Vanadium slag
Water leaching
Article
Funding: This research was funded by the ADCHEM project, Tekes (grant number: 1792/31/2016).
Copyright information: © 2022 The Authors. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
  https://creativecommons.org/licenses/by/4.0/