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Cold model study of blast gas discharge from the taphole during the blast furnace hearth drainage

Journal Article


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Abstract


  • Blast gas discharge from the taphole in the course of the blast furnace hearth drainage was experimentally studied using a packed bed cold model. It was found that gas break-through time was strongly influenced by the furnace operating conditions and coke bed structure. Gas break-through time decreases with (a) increasing draining rate; (b) decreasing slag and iron levels in the hearth; and (c) increasing slag viscosity. It increases with an increase in the coke-free layer depth and coke-free space width. Under certain conditions, the gas-liquid interface in the region directly above the taphole becomes unstable, leading to viscous finger formation and subsequently early blast gas discharge from the taphole. The amount of blast gas entrained into the taphole due to viscous fingering, when it occurs, is sufficient to cause a splashy taphole stream. © 2012 ISIJ.

UOW Authors


  •   He, Qinglin (external author)
  •   Evans, Geoffrey M. (external author)
  •   Zulli, Paul
  •   Tanzil, F W B U (external author)

Publication Date


  • 2012

Citation


  • He, Q., Evans, G., Zulli, P. & Tanzil, F. (2012). Cold model study of blast gas discharge from the taphole during the blast furnace hearth drainage. ISIJ International, 52 (5), 774-778.

Scopus Eid


  • 2-s2.0-84863100608

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7619&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6589

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 774

End Page


  • 778

Volume


  • 52

Issue


  • 5

Place Of Publication


  • Japan

Abstract


  • Blast gas discharge from the taphole in the course of the blast furnace hearth drainage was experimentally studied using a packed bed cold model. It was found that gas break-through time was strongly influenced by the furnace operating conditions and coke bed structure. Gas break-through time decreases with (a) increasing draining rate; (b) decreasing slag and iron levels in the hearth; and (c) increasing slag viscosity. It increases with an increase in the coke-free layer depth and coke-free space width. Under certain conditions, the gas-liquid interface in the region directly above the taphole becomes unstable, leading to viscous finger formation and subsequently early blast gas discharge from the taphole. The amount of blast gas entrained into the taphole due to viscous fingering, when it occurs, is sufficient to cause a splashy taphole stream. © 2012 ISIJ.

UOW Authors


  •   He, Qinglin (external author)
  •   Evans, Geoffrey M. (external author)
  •   Zulli, Paul
  •   Tanzil, F W B U (external author)

Publication Date


  • 2012

Citation


  • He, Q., Evans, G., Zulli, P. & Tanzil, F. (2012). Cold model study of blast gas discharge from the taphole during the blast furnace hearth drainage. ISIJ International, 52 (5), 774-778.

Scopus Eid


  • 2-s2.0-84863100608

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7619&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6589

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 774

End Page


  • 778

Volume


  • 52

Issue


  • 5

Place Of Publication


  • Japan