Prevention of Air Suction from the Contact-part between Sliding Gate and Immersion Nozzle

この論文にアクセスする

この論文をさがす

著者

    • TAKAGI Sigeo
    • Department of Mechanical Engineering, Nippon Institute of Technology
    • IGUCHI Manabu
    • Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University
    • ASAKO Yutaka
    • Department of Mechanical Engineering, Tokyo Metropolitan University
    • HARA Sigeta
    • Department of Materials Science and Processing, Osaka University

抄録

With increasing requirement of steel quality in continuous casting, it is extremely important to regulate reasonably flow rate of molten steel without either biased flow or reoxidation by the suction of air from around the contact-part between sliding gate (SG) and immersion nozzle (SEN). In this study, a novel/method to prevent the suction of air from all around the contact-part between the SG and SEN during controlling the flow rate of molten steel, has been developed by giving a step to the SEN. The effects of the step in the SEN on the prevention of air suction from all around the contact-part can be summarized as follows: <br>(1) The flow squeezed passing through the SG is turned abruptly just before the step in the SEN and, as a reverse flow, passes towards the contact-part between the SG and SEN, where its kinetic energy is converted into the pressure energy as a kind of impinging-flow-action, resulting in a positive pressure on the contact-part. <br>(2) With increasing amount of sliding-gate-opening, the distance downstream from the gate to the step, that is necessary for the contact-pressure to be positive on the contact-part, becomes wider. Over some opening amount, the contact pressure is always positive under the condition that a dimensionless step width (ratio of step-width to inner-diameter of nozzle) is over 0.15. <br> From the above-mentioned issues, it is found possible to prevent the air suction from all around the contact-part between the SG and SEN using the SEN with the step beneath the sliding gate.

収録刊行物

  • ISIJ international

    ISIJ international 38(12), 1346-1352, 1998-12-15

    The Iron and Steel Institute of Japan

参考文献:  11件中 1-11件 を表示

  • <no title>

    TSUKAMOTO N.

    74th ISS Steelmaking Conf. Proc. 803, 1991

    被引用文献1件

  • <no title>

    KITAGAWA I.

    CAMP-ISIJ 4, 261, 1991

    被引用文献1件

  • <no title>

    KASAI N.

    CAMP-ISIJ 4, 1249, 1991

    被引用文献1件

  • <no title>

    NAKAYAMA S.

    CAMP-ISIJ 3, 195, 1990

    被引用文献1件

  • <no title>

    RACKERS K. G.

    78th ISS Steelmaking Conf. Proc. 723, 1995

    被引用文献1件

  • <no title>

    SINGH S. N.

    Metall. Trans. 5B, 1974, 1974

    被引用文献1件

  • <no title>

    NAKATA H.

    CAMP-ISIJ 4, 259, 1991

    被引用文献1件

  • <no title>

    OKA M.

    CAMP-ISIJ 6, 273, 1993

    被引用文献1件

  • <no title>

    TOKUNAGA H.

    CAMP-ISIJ 7, 306, 1994

    被引用文献1件

  • <no title>

    LAUNDER B. E.

    Computer Methods Appl. Mech. Eng. 13, 269, 1974

    被引用文献3件

  • <no title>

    Fluent User's Manual Version 4.4, 1996

    被引用文献5件

各種コード

ページトップへ