Behavior of Ironmaking Slag Permeation to Carbonaceous Material Layer

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著者

    • OHNO Ko-ichiro
    • Department of Metallurgy, Graduate School of Engineering, Tohoku University
    • MIKI Takahiro
    • Department of Metallurgy, Graduate School of Engineering, Tohoku University
    • SASAKI Yasushi
    • Department of Metallurgy, Graduate School of Engineering, Tohoku University
    • HINO Misutaka
    • Department of Metallurgy, Graduate School of Engineering, Tohoku University

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 1 873 K 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.<br>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 <i>H</i><sub>C</sub>=<i>A</i>/<i>L</i><sub>C</sub>+<i>L</i><sub>C</sub>/2, where <i>A</i> is constant and <i>H</i><sub>C</sub> and <i>L</i><sub>C</sub> 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 (=√(−γ<sub>L</sub> cos θ/ρℊ)) in the model can be used to characterize the slag permeation behaviour.

収録刊行物

  • ISIJ international

    ISIJ international 46(12), 1783-1790, 2006-12-15

    The Iron and Steel Institute of Japan

参考文献:  9件中 1-9件 を表示

  • <no title>

    SAWA Y.

    ISIJ Int. 41(Supplement), S17, 2001

    被引用文献1件

  • <no title>

    OHNO K.

    ISIJ Int. 44, 2033, 2004

    被引用文献1件

  • <no title>

    JIMBO I.

    Proc. of The Sixth Int. Iron and Steel Cong., 1990, 1990

    被引用文献1件

  • <no title>

    RAASK E.

    Mineral Impurities in Coal Combustion, 1985

    被引用文献1件

  • <no title>

    MUKAI K.

    J. Jpn. Inst. Met. 45, 147, 1981

    被引用文献1件

  • <no title>

    BARRETT L. R.

    J. Soc. Glass Tech. 43, 179T, 1959

    被引用文献1件

  • <no title>

    OHNO K.

    Steel Res. 74(1), 5, 2003

    被引用文献4件

  • <no title>

    MEHTA A. S.

    Scand. J. Metall. 29, 17, 2000

    被引用文献5件

  • Computer Aided Interfacial Measurements.

    Jimbo Itaru , Cramb Alan W.

    ISIJ International 32(1), 26-35, 1992

    J-STAGE DOI 被引用文献13件

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