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首页> 外文期刊>ISIJ international >Coke Degradation under Simulated Blast Furnace Conditions
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Coke Degradation under Simulated Blast Furnace Conditions

机译：模拟高炉条件下的焦炭降解

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摘要

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 N_2 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 l-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 l-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.
机译：对三种由焦炭分级得到的冶金焦进行高炉样气体成分-温度曲线至1673 K，在N_2至2 273 K下退火，气化后于1 873和2 273退火。 K.反应和退火后焦炭的降解通过L鼓翻滚，拉伸试验，超微压痕和X射线衍射进行表征。气化和退火均降低了焦炭的机械强度。与在1 673 K下进行退火相比，在相同温度下气化对所有三种焦炭均造成较大的降解，并且对反应性更高的焦炭的影响更为明显。在退火过程中，焦炭的降解在整个焦炭块中发生，并导致抗张强度和I鼓翻滚强度同时降低。在高炉状条件下的气化过程中，整个焦炭都以高反应性降解。然而，低反应性焦炭的降解在外围比在核中更严重，因此气化对焦炭的核及其抗张强度影响很小，但对I〜* _（600 ）。焦炭的微强度随退火温度的升高而显着降低。在相对较低的温度下发生的气化后焦炭微强度的变化很小。与仅在相同温度下进行退火的焦炭相比，气化后进行后续退火的焦炭具有相似的微强度和石墨化程度。

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  • 来源
    《ISIJ international》 |2016年第5期|786-793|共8页
  • 作者

    Xing XING; Harold ROGERS; Guangqing ZHANG; Kim HOCKINGS; Paul ZULLI; Oleg OSTROVSKI;

  • 作者单位

    School of Materials Science and Engineering, UNSW Australia, NSW 2052 Australia;

    BlueScope Steel, Port Kembla, NSW 2505 Australia;

    School of Mechanical, Materials & Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522 Australia;

    BHP Billiton, Brisbane, QLD 4000 Australia;

    BlueScope Steel, Port Kembla, NSW 2505 Australia;

    School of Materials Science and Engineering, UNSW Australia, NSW 2052 Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    coke degradation; blast furnace conditions; macrostrength; microstrength;

    机译：焦炭降解高炉条件;宏观强度微强度;

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