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The volatilization behaviour of typical fluorine-containing slag in steelmaking

It was taken as typical steelmaking fluorine-containing slag systems with the remelting electroslag, continuous casting mould flux and refining slag. The volatilization behaviour of each slag system was analysed by thermogravimetric (TG) and mass spectrometry (MS) detection. The results showed that...

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Autores principales: Zhao, Zhongyu, Zhao, Junxue, Tan, Zexin, Qu, Boqiao, Cui, Yaru
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7481700/
https://www.ncbi.nlm.nih.gov/pubmed/32968527
http://dx.doi.org/10.1098/rsos.200704
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author Zhao, Zhongyu
Zhao, Junxue
Tan, Zexin
Qu, Boqiao
Cui, Yaru
author_facet Zhao, Zhongyu
Zhao, Junxue
Tan, Zexin
Qu, Boqiao
Cui, Yaru
author_sort Zhao, Zhongyu
collection PubMed
description It was taken as typical steelmaking fluorine-containing slag systems with the remelting electroslag, continuous casting mould flux and refining slag. The volatilization behaviour of each slag system was analysed by thermogravimetric (TG) and mass spectrometry (MS) detection. The results showed that the remelting electroslag volatilized significantly above 1300°C and the volatiles were mainly CaF(2), MgF(2) with a small amount of SiF(4) and AlF(3); the continuous casting mould flux volatilization was divided into two stages, in the first stage (500°C∼800°C), CaF(2) and Na(2)O reacted to form NaF, and in the second stage (greater than 1200°C), the CaF(2) evaporation was highlighted; for CaF(2)-CaO-based refining slag, the volatilization was the most significant at the eutectic point 84% CaF(2)–16% CaO, and the volatility can be reduced by adding 5% SiO(2). This research will be guiding significance for the composition and performance control of fluorine-containing slag and metallurgical environmental protection in the steelmaking process.
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spelling pubmed-74817002020-09-22 The volatilization behaviour of typical fluorine-containing slag in steelmaking Zhao, Zhongyu Zhao, Junxue Tan, Zexin Qu, Boqiao Cui, Yaru R Soc Open Sci Chemistry It was taken as typical steelmaking fluorine-containing slag systems with the remelting electroslag, continuous casting mould flux and refining slag. The volatilization behaviour of each slag system was analysed by thermogravimetric (TG) and mass spectrometry (MS) detection. The results showed that the remelting electroslag volatilized significantly above 1300°C and the volatiles were mainly CaF(2), MgF(2) with a small amount of SiF(4) and AlF(3); the continuous casting mould flux volatilization was divided into two stages, in the first stage (500°C∼800°C), CaF(2) and Na(2)O reacted to form NaF, and in the second stage (greater than 1200°C), the CaF(2) evaporation was highlighted; for CaF(2)-CaO-based refining slag, the volatilization was the most significant at the eutectic point 84% CaF(2)–16% CaO, and the volatility can be reduced by adding 5% SiO(2). This research will be guiding significance for the composition and performance control of fluorine-containing slag and metallurgical environmental protection in the steelmaking process. The Royal Society 2020-08-26 /pmc/articles/PMC7481700/ /pubmed/32968527 http://dx.doi.org/10.1098/rsos.200704 Text en © 2020 The Authors. http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/http://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Chemistry
Zhao, Zhongyu
Zhao, Junxue
Tan, Zexin
Qu, Boqiao
Cui, Yaru
The volatilization behaviour of typical fluorine-containing slag in steelmaking
title The volatilization behaviour of typical fluorine-containing slag in steelmaking
title_full The volatilization behaviour of typical fluorine-containing slag in steelmaking
title_fullStr The volatilization behaviour of typical fluorine-containing slag in steelmaking
title_full_unstemmed The volatilization behaviour of typical fluorine-containing slag in steelmaking
title_short The volatilization behaviour of typical fluorine-containing slag in steelmaking
title_sort volatilization behaviour of typical fluorine-containing slag in steelmaking
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7481700/
https://www.ncbi.nlm.nih.gov/pubmed/32968527
http://dx.doi.org/10.1098/rsos.200704
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