Investigation on Vanadium Chemistry in Basic-Oxygen-Furnace (BOF) Slags—A First Approach

Basic oxygen furnace (BOF) slag accounts for the majority of all residual materials produced during steelmaking and may typically contain certain transition metals. Vanadium, in particular, came into focus in recent years because of its potential environmental toxicity as well as its economic value....

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Autores principales:	Sophie Wunderlich, Thomas Schirmer, Ursula E. A. Fittschen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	BOF-slag steel slag vanadium calcium orthosilicate electron probe microanalysis (EPMA) Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/5db7702d20f645f898da5c8e07233597
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spelling	oai:doaj.org-article:5db7702d20f645f898da5c8e072335972021-11-25T18:22:32ZInvestigation on Vanadium Chemistry in Basic-Oxygen-Furnace (BOF) Slags—A First Approach10.3390/met111118692075-4701https://doaj.org/article/5db7702d20f645f898da5c8e072335972021-11-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1869https://doaj.org/toc/2075-4701Basic oxygen furnace (BOF) slag accounts for the majority of all residual materials produced during steelmaking and may typically contain certain transition metals. Vanadium, in particular, came into focus in recent years because of its potential environmental toxicity as well as its economic value. This study addresses the vanadium chemistry in BOF slags to better understand its recovery and save handling of the waste stream. The experimental results from the electron probe microanalysis (EPMA) study show that vanadium is preferably incorporated in calcium orthosilicate-like compounds (COS), with two variations occurring, a low vanadium COS (COS-Si) (approx. 1 wt.%), and a high vanadium COS (COS-V) (up to 18 wt.%). Additionally, vanadium is incorporated in dicalcium ferrite-like compounds (DFS) with an average amount of 3 wt.%. Using powder x-ray diffraction analysis (PXRD), EPMA, and virtual component models, stoichiometric formulas of the main vanadium-bearing phases were postulated. The stoichiometries give an estimate of the oxidation states of vanadium in the respective hosts. According to these results, trivalent vanadium is incorporated on the Fe-position in dicalcium ferrite solid solution (DFS), and V<sup>4+</sup> and V<sup>5+</sup> are incorporated on the Si-position of the COS.Sophie WunderlichThomas SchirmerUrsula E. A. FittschenMDPI AGarticleBOF-slagsteel slagvanadiumcalcium orthosilicateelectron probe microanalysis (EPMA)Mining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1869, p 1869 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	BOF-slag steel slag vanadium calcium orthosilicate electron probe microanalysis (EPMA) Mining engineering. Metallurgy TN1-997
spellingShingle	BOF-slag steel slag vanadium calcium orthosilicate electron probe microanalysis (EPMA) Mining engineering. Metallurgy TN1-997 Sophie Wunderlich Thomas Schirmer Ursula E. A. Fittschen Investigation on Vanadium Chemistry in Basic-Oxygen-Furnace (BOF) Slags—A First Approach
description	Basic oxygen furnace (BOF) slag accounts for the majority of all residual materials produced during steelmaking and may typically contain certain transition metals. Vanadium, in particular, came into focus in recent years because of its potential environmental toxicity as well as its economic value. This study addresses the vanadium chemistry in BOF slags to better understand its recovery and save handling of the waste stream. The experimental results from the electron probe microanalysis (EPMA) study show that vanadium is preferably incorporated in calcium orthosilicate-like compounds (COS), with two variations occurring, a low vanadium COS (COS-Si) (approx. 1 wt.%), and a high vanadium COS (COS-V) (up to 18 wt.%). Additionally, vanadium is incorporated in dicalcium ferrite-like compounds (DFS) with an average amount of 3 wt.%. Using powder x-ray diffraction analysis (PXRD), EPMA, and virtual component models, stoichiometric formulas of the main vanadium-bearing phases were postulated. The stoichiometries give an estimate of the oxidation states of vanadium in the respective hosts. According to these results, trivalent vanadium is incorporated on the Fe-position in dicalcium ferrite solid solution (DFS), and V<sup>4+</sup> and V<sup>5+</sup> are incorporated on the Si-position of the COS.
format	article
author	Sophie Wunderlich Thomas Schirmer Ursula E. A. Fittschen
author_facet	Sophie Wunderlich Thomas Schirmer Ursula E. A. Fittschen
author_sort	Sophie Wunderlich
title	Investigation on Vanadium Chemistry in Basic-Oxygen-Furnace (BOF) Slags—A First Approach
title_short	Investigation on Vanadium Chemistry in Basic-Oxygen-Furnace (BOF) Slags—A First Approach
title_full	Investigation on Vanadium Chemistry in Basic-Oxygen-Furnace (BOF) Slags—A First Approach
title_fullStr	Investigation on Vanadium Chemistry in Basic-Oxygen-Furnace (BOF) Slags—A First Approach
title_full_unstemmed	Investigation on Vanadium Chemistry in Basic-Oxygen-Furnace (BOF) Slags—A First Approach
title_sort	investigation on vanadium chemistry in basic-oxygen-furnace (bof) slags—a first approach
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5db7702d20f645f898da5c8e07233597
work_keys_str_mv	AT sophiewunderlich investigationonvanadiumchemistryinbasicoxygenfurnacebofslagsafirstapproach AT thomasschirmer investigationonvanadiumchemistryinbasicoxygenfurnacebofslagsafirstapproach AT ursulaeafittschen investigationonvanadiumchemistryinbasicoxygenfurnacebofslagsafirstapproach
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Investigation on Vanadium Chemistry in Basic-Oxygen-Furnace (BOF) Slags—A First Approach

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