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Flow of molten slag through coke channels

Journal Article


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Abstract


  • In the lower zone of the iron making blast furnace, liquid iron and slag descend counter-current to reducing

    gases through a packed bed of coke. The characteristics of the flow of these liquids and their holdup

    influence product quality and furnace operation. The present study aimed to establish the criteria for the

    passage of slag through the narrow pore necks that form between coke particles. The flow of slag

    through coke pore necks has been simulated using an experimental technique that assesses slag flow

    from a funnel entering a narrow channel of known diameter. Synthetic coke was mainly used to minimise

    experimental uncertainty associated with the use of variable industrial coke and to allow control of the

    coke mineralogy. Industrial coke and graphite were also tested. Pellets of slag with compositions in the

    CaO-Si02-MgO-Ab03 system were melted in the coke funnels and heated to 1 500°C under argon, then

    held at temperature for a certain time. After cooling, the passage of slag through the channel was determined

    and the interactions of the slag and coke were characterized. Variables assessed included slag

    composition, coke mineralogy and channel diameter.

    For the slags and cokes studied, the minimum channel diameter that allowed slag to flow was between

    4.4 and 5.0 mm. For smaller diameters, slag did not flow through the channel. The flow mechanism was

    discussed in terms of a simple gravity and capillary/interfacial force analysis of the system.

UOW Authors


Publication Date


  • 2013

Citation


  • George, H. Labib., Monaghan, B. Joseph., Longbottom, R. James., Chew, S. Jason. & Austin, P. Richard. (2013). Flow of molten slag through coke channels. Iron and Steel Institute of Japan (ISIJ) International, 53 (7), 1172-1179.

Scopus Eid


  • 2-s2.0-84883227154

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2241&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1232

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 1172

End Page


  • 1179

Volume


  • 53

Issue


  • 7

Place Of Publication


  • Japan

Abstract


  • In the lower zone of the iron making blast furnace, liquid iron and slag descend counter-current to reducing

    gases through a packed bed of coke. The characteristics of the flow of these liquids and their holdup

    influence product quality and furnace operation. The present study aimed to establish the criteria for the

    passage of slag through the narrow pore necks that form between coke particles. The flow of slag

    through coke pore necks has been simulated using an experimental technique that assesses slag flow

    from a funnel entering a narrow channel of known diameter. Synthetic coke was mainly used to minimise

    experimental uncertainty associated with the use of variable industrial coke and to allow control of the

    coke mineralogy. Industrial coke and graphite were also tested. Pellets of slag with compositions in the

    CaO-Si02-MgO-Ab03 system were melted in the coke funnels and heated to 1 500°C under argon, then

    held at temperature for a certain time. After cooling, the passage of slag through the channel was determined

    and the interactions of the slag and coke were characterized. Variables assessed included slag

    composition, coke mineralogy and channel diameter.

    For the slags and cokes studied, the minimum channel diameter that allowed slag to flow was between

    4.4 and 5.0 mm. For smaller diameters, slag did not flow through the channel. The flow mechanism was

    discussed in terms of a simple gravity and capillary/interfacial force analysis of the system.

UOW Authors


Publication Date


  • 2013

Citation


  • George, H. Labib., Monaghan, B. Joseph., Longbottom, R. James., Chew, S. Jason. & Austin, P. Richard. (2013). Flow of molten slag through coke channels. Iron and Steel Institute of Japan (ISIJ) International, 53 (7), 1172-1179.

Scopus Eid


  • 2-s2.0-84883227154

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2241&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1232

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 1172

End Page


  • 1179

Volume


  • 53

Issue


  • 7

Place Of Publication


  • Japan