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Coke degradation under simulated blast furnace conditions

Journal Article


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Abstract


  • Three metallurgical cokes made from coking coals over a significant range in rank were subjected to

    treatment with blast furnace-like gas composition-temperature profile to 1 673 K, annealing under N2 to

    2 273 K and gasification with subsequent annealing at 1 873 and 2 273 K. The degradation of cokes after

    reaction and annealing was characterised using I-drum tumbling, tensile testing, ultra-micro indentation

    and X-ray diffraction. Both gasification and annealing decreased the mechanical strength of coke. Compared

    with annealing at 1 673 K, gasification at same temperature caused larger degradation for all three

    cokes, and the effect was more significant on more reactive coke. In the annealing process, degradation

    of the cokes occurred through the entire coke lump and resulted in both tensile strength and I-drum tumbling

    strength decreasing simultaneously. In the process of gasification under the blast furnace-like conditions,

    degradation took place through the whole piece of coke with high reactivity; however, the degradation

    of coke with low reactivity was more severe at the periphery than in the core and therefore gasification

    had a minimal effect on the core of the coke and its tensile strength, but had a much stronger effect on

    I*

    600. Microstrength of coke decreased significantly with increasing annealing temperature. The change of

    microstrength of coke upon gasification, which occurred at relatively low temperatures, was marginal. The

    cokes after gasification with subsequent annealing had similar microstrength and graphitisation degree

    compared to those subjected only to annealing at the same temperature.

Authors


  •   Xing, Xing (external author)
  •   Rogers, Harold P. (external author)
  •   Zhang, Guangqing
  •   Hockings, Kim (external author)
  •   Zulli, Paul
  •   Ostrovski, Oleg (external author)

Publication Date


  • 2016

Citation


  • Xing, X., Rogers, H., Zhang, G., Hockings, K., Zulli, P. & Ostrovski, O. (2016). Coke degradation under simulated blast furnace conditions. ISIJ International, 56 (5), 786-793.

Scopus Eid


  • 2-s2.0-84971455155

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6619&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5591

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 786

End Page


  • 793

Volume


  • 56

Issue


  • 5

Place Of Publication


  • Japan

Abstract


  • Three metallurgical cokes made from coking coals over a significant range in rank were subjected to

    treatment with blast furnace-like gas composition-temperature profile to 1 673 K, annealing under N2 to

    2 273 K and gasification with subsequent annealing at 1 873 and 2 273 K. The degradation of cokes after

    reaction and annealing was characterised using I-drum tumbling, tensile testing, ultra-micro indentation

    and X-ray diffraction. Both gasification and annealing decreased the mechanical strength of coke. Compared

    with annealing at 1 673 K, gasification at same temperature caused larger degradation for all three

    cokes, and the effect was more significant on more reactive coke. In the annealing process, degradation

    of the cokes occurred through the entire coke lump and resulted in both tensile strength and I-drum tumbling

    strength decreasing simultaneously. In the process of gasification under the blast furnace-like conditions,

    degradation took place through the whole piece of coke with high reactivity; however, the degradation

    of coke with low reactivity was more severe at the periphery than in the core and therefore gasification

    had a minimal effect on the core of the coke and its tensile strength, but had a much stronger effect on

    I*

    600. Microstrength of coke decreased significantly with increasing annealing temperature. The change of

    microstrength of coke upon gasification, which occurred at relatively low temperatures, was marginal. The

    cokes after gasification with subsequent annealing had similar microstrength and graphitisation degree

    compared to those subjected only to annealing at the same temperature.

Authors


  •   Xing, Xing (external author)
  •   Rogers, Harold P. (external author)
  •   Zhang, Guangqing
  •   Hockings, Kim (external author)
  •   Zulli, Paul
  •   Ostrovski, Oleg (external author)

Publication Date


  • 2016

Citation


  • Xing, X., Rogers, H., Zhang, G., Hockings, K., Zulli, P. & Ostrovski, O. (2016). Coke degradation under simulated blast furnace conditions. ISIJ International, 56 (5), 786-793.

Scopus Eid


  • 2-s2.0-84971455155

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6619&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5591

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 786

End Page


  • 793

Volume


  • 56

Issue


  • 5

Place Of Publication


  • Japan