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Carbon Dissolution Occurring during Graphite-Ferrosilicon Interactions at 1550℃

机译：1550℃石墨-硅铁相互作用中碳的溶解

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摘要

The carburisation reaction is a key reaction for the cupola process, since the metallic liquid droplets interact with coke at high temperatures. The kinetic mechanism of carbon dissolution in liquid iron had been extensively investigated. However, there is little knowledge about the kinetics of carbon dissolution when the silicon contents are over 10%, since the silicon content during the iron and steel making processes are usually well below this limit.rnCarbon dissolution phenomenon and associated mechanisms are established for ferrosilicon alloys and silicon at 1 550℃ in this study. The overall-rate constants at 1 550℃ for Si 98.5%, FeSi 74% and FeSi 24.7% were 3.8, 3 and 3.9×10~(-3)(s~(-1)) respectively. The appearance of SiC as an interfacial product was found during the metal-graphite interactions and its role as a retarding agent during the carbon pickup was established.rnThe kinetics of carbon dissolution from graphite is controlled by a mixed-control mechanism and this includes the diffusion of carbon and carbon transfer from the SiC interfacial layer.
机译：渗碳反应是冲天炉过程的关键反应，因为金属液滴在高温下会与焦炭相互作用。碳在铁水中溶解的动力学机理已被广泛研究。但是，当硅含量超过10％时，关于碳溶解的动力学知之甚少，因为钢铁制造过程中的硅含量通常远低于此极限.rn硅铁合金的碳溶解现象及其相关机理已经建立本研究中的硅和硅在1550℃。 Si 98.5％，FeSi 74％和FeSi 24.7％在1550℃下的总速率常数分别为3.8、3和3.9×10〜（-3）（s〜（-1））。在金属与石墨的相互作用过程中发现了SiC作为界面产物的出现，并确立了其在碳吸收过程中作为阻滞剂的作用。rn碳从石墨中溶解的动力学受混合控制机制控制，其中包括扩散碳和从SiC界面层的碳转移。

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  • 来源
    《ISIJ international》 |2009年第12期|1868-1873|共6页
  • 作者

    PEDRO J. YUNES RUBIO; N. SAHA-CHAUDHURY; VEENA SAHAJWALLA;

  • 作者单位

    Centre for Sustainable Materials Research and Technology, School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia;

    Centre for Sustainable Materials Research and Technology, School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia;

    Centre for Sustainable Materials Research and Technology, School of Materials Science and Engineering, University of New South Wales, Sydney, 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

    ferrosilicon; graphite; carburisation; kinetics;

    机译：硅铁石墨;渗碳动力学;

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