Effect of Surface Morphology on the Flow of Entrained Fine Particles by Ascending Gas through Packed Beds

Nobuyuki Hidaka; Toshitatsu Matsumoto; Katsuki Kusakabe; Shigeharu Morooka

Korean Journal of Chemical Engineering, Vol.16, No.6, 852-855, November, 1999

DOI10.1007/BF02698365 Export Citation

Effect of Surface Morphology on the Flow of Entrained Fine Particles by Ascending Gas through Packed Beds

Nobuyuki Hidaka^{1, †}, Toshitatsu Matsumoto¹, Katsuki Kusakabe^{1, 2}, and Shigeharu Morooka^{1, 2}

¹Department of Applied Chemistry and Chemical Engineering, Kagoshima University, Kagoshima, Japan
²Department of Material Physics and Chemistry, Graduate School of Engineering, Kyushu University, Fukuoka, Japan

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Coarse particles of glass or cokes were packed in vertical columns, 1- and 2-m in height, and fine particles of glass or coke were entrained through the columns by the ascending gas flow. These systems were used as a model to investigate the flow of fine coal particles introduced into a blast furnace. The effects of properties of packed particles, as well as fines, on the static and dynamic holdups of fines were then investigated. The static holdup of fines was strongly affected by the surface roughness of the packed particles, while the dynamic holdup of fines was not. These results suggest that the fine particles are trapped in the form of static holdup in the isolated narrow spaces bounded with packed particles, and that they remain on the surface of the packed particles which are exposed to the gas flow for only a short period of time.

Keywords:Entrainment;Blast Furnace;Packed Bed;Gas-Solid Flow;Holdup

[References]

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[2] Ariyama T, Sato M, Asakawa Y, Kag. Kog. Ronbunshu, 22, 171 (1996)

[3] Chen J, Nogami H, Akiyama T, Takahashi R, Yagi J, ISIJ Intern., 34, 133 (1994)

[4] Hidaka N, Iyama J, Matsumoto T, Kusakabe K, Morooka S, Powder Technol., 95(3), 265 (1998)

[5] Hidaka N, Matsumoto T, Kusakabe K, Morooka S, J. Chem. Eng. Jpn., 32(2), 197 (1999)

[6] Kusakabe K, Yamaki T, Morooka S, Matsuyama H, Tetsu-to-Hagane, 77, 1407 (1991)

[7] Kusakabe K, Yamaki T, Morooka S, Tetsu-to-Hagane, 77, 1413 (1991)

[8] Shibata K, Shimizu M, Inaba S, Takahashi R, Yagi J, ISIJ Intern., 31, 434 (1991)

[9] Sugiyama T, Tetsu-to-Hagane, 82, 29 (1996)

[10] Yagi J, ISIJ Intern., 33, 619 (1993)

[11] Yamaoka H, Tetsu-to-Hagane, 77, 403 (1986)

[12] Yamaoka H, Tetsu-to-Hagane, 77, 2194 (1986)