Behavior of ironmaking slag permeation to carbonaceous material layer

Kousuke Saito, Ko Ichiro Ohno, Takahiro Miki, Yasushi Sasaki, Misutaka Hino

研究成果: ジャーナルへの寄稿学術誌査読

27 被引用数 (Scopus)

抄録

To investigate the slag permeation to packed bed of carbonaceous materials, the measurement of molten slag's densities, surface tensions and dynamic contact angle on carbonaceous materials at relatively low temperatures (from 1 673 to 1 773 K) are carried out by applying the sessile droplet method. The interfacial compositions of slags and carbonaceous materials were examined by SEM/EDX. SiC at carbonaceous material surface was not observed. The variation of measured density, contact angle and surface tension with time were found to be almost negligible with given slag composition and at given temperature. It is reported that carbonaceous material wettability at the temperature of more than 1 873K was strongly dependent on the slag composition as well as carbon properties. The almost constant contact angel with time in this study can be attributed to the negligible formation of SiC at carbonaceous material surface. The slag permeation model has been developed along with the measurement of physical properties. The maximum retention height of liquid layer on the sphere packing layer is expressed by Hc=A/Lc+Lc2, where A is constant and Hc and Lc are the dimensionless slag layer retention height and the dimensionless sphere's diameter, respectively. Slag layer retention height on the carbonaceous material packing layer is evaluated using the measured physical properties. The proposed characteristic length λ(=√-γL cosθ/ρg) in the model can be used to characterize the slag permeation behaviour.

本文言語英語
ページ(範囲)1783-1790
ページ数8
ジャーナルisij international
46
12
DOI
出版ステータス出版済み - 2006
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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