start-ver=1.4
cd-journal=joma
no-vol=6
cd-vols=
no-issue=
article-no=
start-page=132
end-page=141
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2020
dt-pub=20200203
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Alkali Elution Behavior of Steelmaking Slag Packed in an Open Channel Vessel in Seawater
en-subtitle=
kn-subtitle=
en-abstract=
kn-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.
en-copyright=
kn-copyright=

en-aut-name=MatsudaYamato
en-aut-sei=Matsuda
en-aut-mei=Yamato
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=UddinMd. Azhar
en-aut-sei=Uddin
en-aut-mei=Md. Azhar
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=KatoYoshiei
en-aut-sei=Kato
en-aut-mei=Yoshiei
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=MiyataYasuhito
en-aut-sei=Miyata
en-aut-mei=Yasuhito
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=KisoEiji
en-aut-sei=Kiso
en-aut-mei=Eiji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

affil-num=1
en-affil=Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University
kn-affil=

affil-num=2
en-affil=Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University
kn-affil=

affil-num=3
en-affil=Graduate School of Environmental and Life Science, Okayama University
kn-affil=

affil-num=4
en-affil=Slag & Refractories Research Department, Steel Research Laboratory, JFE Steel Corporation
kn-affil=

affil-num=5
en-affil=Marketing Development, Slag & Cement Division, Nippon Steel Corporation
kn-affil=
en-keyword=Steelmaking slag
kn-keyword=Steelmaking slag
en-keyword=Alkali elution
kn-keyword=Alkali elution
en-keyword=Seawater
kn-keyword=Seawater
en-keyword=Open channel
kn-keyword=Open channel
en-keyword=Packed bed
kn-keyword=Packed bed
END