NDLI: Composition-dependent reactive wetting of molten slag on coke substrates

Content Provider	Springer Nature Link
Author	Oh, Joon Seok Lee, Joonho
Copyright Year	2015
Abstract	The reactive wetting behavior of molten CaO–SiO$_{2}$–Al$_{2}$O$_{3}$–MgO slag drops on a coke substrate was investigated using the sessile drop method at 1500 °C in flowing Ar. The wetting behavior of slags in blast furnaces is known to affect the energy efficiency of ironmaking, but has not yet been sufficiently characterized. In this study, the ratio of MgO to CaO was varied from 0.01 to 0.56, while the concentrations of SiO$_{2}$ and Al$_{2}$O$_{3}$ were fixed at 34 and 17 wt%, respectively. The contact angle between slag and coke remained constant for a certain period of time, and then suddenly decreased remarkably. The time until this dramatic contact angle change increased with increasing the ratio of MgO to CaO. Chemical analysis revealed that the reduction of SiO$_{2}$ in the slag improved the wettability by forming SiC on the coke substrate, while MgO in the slag was preferentially reduced and prevented the reduction of SiO$_{2}$. Consequently, with increasing MgO content, the wettability of the molten slag on the coke substrate decreased.
Starting Page	1813
Ending Page	1819
Page Count	7
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	51
Issue Number	4
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2015-11-23
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Materials Science Characterization and Evaluation of Materials Polymer Sciences Continuum Mechanics and Mechanics of Materials Crystallography Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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