1-1-4 Enhancement of the strength of low grade cokes and pyrolyzed chars by carbonaceous materials derived from COG tar

DOI

Bibliographic Information

Other Title
  • 1-1-4 タール由来炭素質物質による低強度コークスおよびチャーの高強度化

Abstract

<p>Carbon/carbon composites are prepared in the following manner : COG tar recovered from a commercial coke oven is first mixed with low grade cokes or pyrolyzed chars from lignite and sub-bituminous coals, and the resulting mixtures are then heated in He at 10 °C/min up to 500-900 °C with a flow-type fixed bed quartz reactor. The tensile strength of each composite prepared is investigated with a tensile and compression testing machine. The strength increases with increasing weight ratio of tar to coke or char up to about 2, and it becomes approximately 6.0 MPa at this ratio. The strength also increases with increasing pyrolysis temperature up to 800 °C, it reaches about 7.5 MPa, which is comparable to those (7.0 MPa) of high grade cokes used in commercial blast furnaces. On the basis of the results of pore size distribution measurements, it is likely that the increase in the strength takes place as a results of the infiltration of tar-derived carbonaceous materials into pores in low grade cokes and pyrolyzed chars.</p>

Journal

Details 詳細情報について

  • CRID
    1390001205813494272
  • NII Article ID
    130005436891
  • DOI
    10.20550/jietaikaiyoushi.25.0_8
  • ISSN
    24238325
    24238317
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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