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首页> 外文期刊>ISIJ international >Estimation of Effective Diffusion Coefficient of Gaseous Species in MgO-C Refractories by Shrinking Core Model
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Estimation of Effective Diffusion Coefficient of Gaseous Species in MgO-C Refractories by Shrinking Core Model

机译:收缩核模型估算MgO-C耐火材料中气态物质的有效扩散系数

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摘要

Different content of various anti-oxidants, Mg, Al, Si, SiC and B4C was added to MgO-C refractories, ranging from 1 to 7 wt.%. Exposed to the air at 1 200℃, weight changes of cylindrical specimens were measured by a thermo gravimeter (TG). Based on shrinking core model, a mathematical model was modified by introducing anti-oxidant consumption factor. And the effective diffusion coefficient of gaseous species in refractories with different anti-oxidants was calculated by measuring results of weight change. The phase changes of the anti-oxidants' oxidation process were researched by XRD, and the volume expansions of this process were derived according to theoretical calculation. It was found that Mg had negative effect on diminishing the effective diffusion coefficient, while Al, Si, SiC and B4C had positive effect on it. For B4CS largest volume expansion at the oxidation process, effective diffusion coefficient in samples with B4C addition was smaller than that in samples with other additions.
机译:将不同含量的各种抗氧化剂,Mg,Al,Si,SiC和B4C添加到MgO-C耐火材料中,含量范围为1至7 wt。%。暴露于1200℃的空气中,用热重计(TG)测量圆柱试样的重量变化。在收缩核模型的基础上,通过引入抗氧化剂消耗因子对数学模型进行了修改。通过测量重量变化结果,计算出了不同抗氧化剂的耐火材料中气态物质的有效扩散系数。用XRD研究了抗氧化剂氧化过程的相变,并根据理论计算推导了该过程的体积膨胀。研究发现,Mg对降低有效扩散系数具有负面影响,而Al,Si,SiC和B4C对其具有正面影响。对于B4CS在氧化过程中最大的体积膨胀,添加B4C的样品的有效扩散系数要小于添加其他B4CS的样品。

著录项

  • 来源
    《ISIJ international》 |2012年第7期|p.1186-1195|共10页
  • 作者单位

    College of Information Science and Engineering, Northeastern University, China, Mailbox321#, Northeastern University,Shenyang, Liaoning, 110004 China;

    College of Information Science and Engineering, Northeastern University, China, Mailbox321#, Northeastern University,Shenyang, Liaoning, 110004 China;

    Shenyang Taihe Metallurgical Measurement and Control Technologies Co., Ltd.,China, Mailbox321#, Northeastern University, Shenyang, Liaoning, 110004 China;

    College of Information Science and Engineering, Northeastern University, China, Mailbox321#, Northeastern University,Shenyang, Liaoning, 110004 China;

    College of Information Science and Engineering, Northeastern University, China, Mailbox321#, Northeastern University,Shenyang, Liaoning, 110004 China;

  • 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

    MgO-C refractories; antioxidants; effective diffusivity; shrinking core model; XRD;

    机译:MgO-C耐火材料;抗氧化剂;有效扩散率缩芯模型;X射线衍射;

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