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Coke microstructure and strength under blast furnace conditions

Conference Paper


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Abstract


  • The effects of gasification reaction and annealing under blast furnace conditions on the

    mechanical strength, micro-strength and graphitisation of two Australian cokes were studied

    using tensile test, ultra micro indentation, XRD and Raman spectroscopy. Mechanical

    strength of coke was decreased by both annealing and gasification. Gasification had a

    stronger effect on coke’s mechanical strength than annealing at 1400 °C; however, annealing

    in the high temperature range 1400-2000 °C caused a more significant decrease in

    mechanical strength. Annealing also decreased the cokes micro-strength, particularly above

    1400 °C. The reactive maceral derived components (RMDC) of feed (original) cokes had

    lower micro-strength than inert maceral derived components (IMDC), and increasing

    annealing temperature had a more significant effect on the degradation of micro-strength of

    RMDC. Both annealing and gasification increased the graphitisation degree of cokes;

    significant increase in the graphitization degree was caused by annealing at temperatures

    above 1400 °C. Graphitisation of RMDC was higher than that of IMDC after annealing, and

    annealing had a stronger effect on the graphitisation of RMDC compared to IMDC.

Publication Date


  • 2013

Citation


  • Xing, X., Zhang, G., Rogers, H., Zulli, P. & Ostrovski, O. (2013). Coke microstructure and strength under blast furnace conditions. 10th Australian Coal Science Conference Proceedings (pp. 1-7). Australia: Australian Institute of Energy.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3307&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2298

Start Page


  • 1

End Page


  • 7

Place Of Publication


  • Australia

Abstract


  • The effects of gasification reaction and annealing under blast furnace conditions on the

    mechanical strength, micro-strength and graphitisation of two Australian cokes were studied

    using tensile test, ultra micro indentation, XRD and Raman spectroscopy. Mechanical

    strength of coke was decreased by both annealing and gasification. Gasification had a

    stronger effect on coke’s mechanical strength than annealing at 1400 °C; however, annealing

    in the high temperature range 1400-2000 °C caused a more significant decrease in

    mechanical strength. Annealing also decreased the cokes micro-strength, particularly above

    1400 °C. The reactive maceral derived components (RMDC) of feed (original) cokes had

    lower micro-strength than inert maceral derived components (IMDC), and increasing

    annealing temperature had a more significant effect on the degradation of micro-strength of

    RMDC. Both annealing and gasification increased the graphitisation degree of cokes;

    significant increase in the graphitization degree was caused by annealing at temperatures

    above 1400 °C. Graphitisation of RMDC was higher than that of IMDC after annealing, and

    annealing had a stronger effect on the graphitisation of RMDC compared to IMDC.

Publication Date


  • 2013

Citation


  • Xing, X., Zhang, G., Rogers, H., Zulli, P. & Ostrovski, O. (2013). Coke microstructure and strength under blast furnace conditions. 10th Australian Coal Science Conference Proceedings (pp. 1-7). Australia: Australian Institute of Energy.

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3307&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2298

Start Page


  • 1

End Page


  • 7

Place Of Publication


  • Australia