Softening and Melting Characteristics of Self-fluxed Pellets with and without the Addition of BOF-slag to the Pellet Bed

この論文にアクセスする

この論文をさがす

著者

    • ZUO Guangqing
    • Division of Process Metallurgy, Lulea University of Technology

抄録

When using 100% self-fluxed pellets in the blast furnace burden, top charged fluxes, especially the BOF-slag, may cause irregularities in operation. The major reason has been theoretically attributed to the problematic slag formation in the furnace. As the melting of pellets is the first step of the slag formation process, the softening and melting properties of LKAB's self-fluxed pellets with and without addition of fluxes are studied experimentally.<br>The results show that the softening and melting properties of the two types of LKAB's self-fluxed pellets are quite suitable for blast furnace operation. Contrarily, the melting-down characteristics of BOF-slag are variable and harmful to the slag formation under a reducing atmosphere. Adding 5% BOF-slag to the self-fluxed pellets can considerably worsen the softening and melting properties of pellets. It can either increase the softening and melting temperature interval substantially or cause the precipitation of solid phases, mainly di-calcium silicates, in the slag. It is quite likely that the resulting slag will therefore become very viscous, even entirely blocking the melting down of the pellets up to a temperature 1520°C.

収録刊行物

  • ISIJ international

    ISIJ international 40(12), 1195-1202, 2000-12-15

    The Iron and Steel Institute of Japan

参考文献:  14件中 1-14件 を表示

  • <no title>

    BRAMMING M.

    Proc.of the 54th Ironmaking Conf., 1995

    被引用文献1件

  • <no title>

    SANDBERG N.

    Proc.of the 55th Ironmaking Conf. Vol.55, 453, 1996

    被引用文献1件

  • <no title>

    HOOEY L

    1998 ICSTI/Ironmaking Conf.Proc. Vol.57, 1609, 1998

    被引用文献1件

  • <no title>

    MA J.

    ISIJ Int. 39, 697, 1999

    被引用文献3件

  • <no title>

    ISHIKAWA Y.

    Proc.AIME Ironmaking Conf. Vol.41, 80, 1982

    被引用文献1件

  • <no title>

    YAMAOKA Y.

    Trans.Iron Steel Inst.Jpn 22, 164, 1982

    被引用文献2件

  • <no title>

    CLIXBY G.

    Ironmaking Steelmaking 7, 68, 1980

    被引用文献1件

  • <no title>

    BENTELL L.

    Proc.AIME Ironmaking Conf Vol.41, 501, 1982

    被引用文献1件

  • <no title>

    HSIEH L.-H.

    2nd Int.Cong.on the Science and Technology of Ironmaking and 57th Ironmaking Conf.Proc. 1623, 1998

    被引用文献1件

  • <no title>

    CLIXBY G.

    Ironmaking Steelmaking 13, 169, 1986

    被引用文献1件

  • <no title>

    RITZ V. J.

    1998 ICSTI/Ironmaking Conf.Proc. 1635, 1998

    被引用文献1件

  • Melting Properties of BOF-Slag and Their Influence on the Slag Formation

    SUNDQVIST OKVIST L.

    Mater's Thesis, Division of Process Metallurgy, Lulea University of Technology 21, 1998

    被引用文献1件

  • <no title>

    LEVIN E. M.

    Phase Diagrams for Ceramists, 1969

    被引用文献1件

  • <no title>

    LEVIN E. M.

    Phase Diagrams for Ceramists Vol.I, 1964

    被引用文献1件

各種コード

ページトップへ