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ID 58229
Author
Matsuda, Yamato Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University
Uddin, Md. Azhar Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University
Kato, Yoshiei Graduate School of Environmental and Life Science, Okayama University ORCID
Miyata, Yasuhito Slag & Refractories Research Department, Steel Research Laboratory, JFE Steel Corporation
Kiso, Eiji Marketing Development, Slag & Cement Division, Nippon Steel Corporation
Abstract
The alkali elution behavior of steelmaking slag in seawater was kinetically investigated and simulated under continuous flow in an open channel vessel with packed bed of steelmaking slag. Two types of steelmaking slags, viz. decarburization slag and dephosphorization slag, were used in this study. The alkali elution rate of decarburization slag was larger than that of dephosphorization slag due to larger free CaO content. The pH value for dephosphorization slag was almost the same as the seawater pH value in 3–4 days, whereas that for decarburization slag was stabilized in 3 days although the pH value was slightly larger than that of seawater. The capacity coefficients of alkali elution for dephosphorization and decarburization slags decreased together in an exponential manner with time. Based on a regression equation on the mass transfer capacity coefficient change with time, the alkali elution behavior was simulated and the calculated results agreed well with the experimental ones. The temporal pH change was predicted by changing slag surface area and seawater flow rate as a parameter. According to the simulation results for dephosphorization slag, the seawater pH value did not reach a high level in the ocean area.
Keywords
Steelmaking slag
Alkali elution
Seawater
Open channel
Packed bed
Note
This fulltext is available in Feb., 2021
Published Date
2020-02-03
Publication Title
Journal of Sustainable Metallurgy
Volume
volume6
Publisher
The Minerals, Metals & Materials Society
Start Page
132
End Page
141
ISSN
2199-3823
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
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Author
DOI
Web of Science KeyUT
Related Url
isVersionOf https://doi.org/10.1007/s40831-020-00264-9