Degradation Characteristics of Iron Ore Fines of a Wide Size Distribution in Fluidized-bed Reduction

この論文にアクセスする

この論文をさがす

著者

    • CHUNG Uoo-chang
    • Smelting Reduction Project Team, Iron and Steel Engineering Center, Research Institute of Industrial Science and Technology
    • LEE Il-ock
    • Smelting Reduction Project Team, Iron and Steel Engineering Center, Research Institute of Industrial Science and Technology
    • KIM Hang-goo
    • Smelting Reduction Project Team, Iron and Steel Engineering Center, Research Institute of Industrial Science and Technology
    • SAHAJWALLA Veena
    • School of Materials Science and Engineering, The University of New South Wales
    • CHUNG Won-bae
    • Department of Metallurgical Engineering, Pusan National University

抄録

Three mechanisms of the degradation behavior of iron ore fines (IOF) sized 1 to 5 mm during fluidized-bed reduction have been investigated: mechanical degradation (MD), thermal degradation (TD) and reactional degradation (RD). The effects of operational parameters such as ore type, temperature, superficial gas velocity, and reducing gas composition have also been studied. The degradation in three mechanisms has been quantitatively evaluated by the amount of IOF smaller than 1 mm which was produced and by the weight change of IOF in the bed during fluidization. The reactional degradation becomes the most predominant aspect among the three and the thermal degradation is the least when the IOF has a low water content, while the degradations of all three aspects are not much different in contribution when the IOF has a high water content. For the effect of operating parameters, the IOF of a lower sphericity showed a higher degradation in the cold fluidization under inert atmosphere but this effect was lessened or negligible under a fluidized-bed reduction at a high temperature. A higher water content in the IOF demonstrated a higher degradation at a high temperature. In the fluidized-bed reduction, the degradation was little affected by the reaction temperature, the superficial gas velocity, and the reducing gas composition. In addition, all three aspects of degradation were mostly completed in the early stage, within 15 min, of the operations.

収録刊行物

  • ISIJ international

    ISIJ international 38(9), 943-952, 1998-09-15

    The Iron and Steel Institute of Japan

参考文献:  18件中 1-18件 を表示

  • Ironmaking 2000

    MEIJER H. K. A.

    18th Advanced Technology Symp. 2, 1994

    被引用文献1件

  • <no title>

    DAVIE M.

    Iron Steelmaker 7, 1996

    被引用文献1件

  • <no title>

    MALGARINI G.

    Iron Steel Eng. 30, 1997

    被引用文献1件

  • <no title>

    MIYAZAKI T.

    Tetsu-to-Hagane 78, 1238, 1996

    被引用文献1件

  • <no title>

    HASAN A.

    Iron Steelmaker 35, 1995

    被引用文献1件

  • <no title>

    CUSACK B. L.

    Iron Steelmaker 13, 1995

    被引用文献1件

  • <no title>

    SATOU K.

    CAMP-ISIJ 4, 1159, 1991

    被引用文献1件

  • <no title>

    RAY Y. -C.

    Power Technol. 49, 193, 1987

    被引用文献1件

  • <no title>

    KONO H. O.

    Power Technol. 52, 49, 1987

    被引用文献1件

  • <no title>

    ARAKI I.

    Tetsu-to-Hagane 82, 817, 1996

    被引用文献1件

  • <no title>

    ARIYAMA T.

    ISIJ Int. 33, 1220, 1993

    被引用文献2件

  • <no title>

    CHUNG U. C.

    J. Korean Inst. Met. Mater. 35, 245, 1997

    被引用文献1件

  • <no title>

    HOWARD J. R.

    Fluidized Bed Technology Principles and Applications 20, 1989

    被引用文献1件

  • <no title>

    LINOY K.

    Power Technology Handbook 13, 1991

    被引用文献1件

  • <no title>

    ARAKI I.

    Tetsu-to-Hagane 78, 1523, 1992

    被引用文献1件

  • <no title>

    CHUNG U. C.

    J. Korean Inst. Met. Mater. 35, 1195, 1997

    被引用文献1件

  • <no title>

    KUNII D.

    Fluidization Engineering 74, 1962

    被引用文献1件

  • <no title>

    KUNII D.

    Fluidization Engineering 68, 1991

    被引用文献1件

各種コード

ページトップへ