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首页> 外文期刊>ISIJ international >Effects of Coke Ash on Erosion of Carbon Composite Brick
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Effects of Coke Ash on Erosion of Carbon Composite Brick

机译：焦炭灰对碳复合砖侵蚀的影响

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摘要

Carbon composite brick has attracted increased attention because it is widely used on the hot face of blast furnace hearth. In order to reduce the erosion rate of carbon composite brick and investigate effects of coke ash on the erosion of carbon composite brick, the minerals CaO-Al_2O_3, CaO-2Al_2O_3, and CaO-6Al_2O_3 (CA, CA2, and CA6), which were considered to be the main components of coke ash in hearth, were prepared by heating a mixture of CaCO_3 and Al_2O_3. Experiments of the minerals coupled with carbon composite brick were carried out at different temperatures in a high temperature tube furnace. The mass change fraction of the experimental assembly was calculated using mass measurements before and after the experiment. The reaction products at different temperatures were predicted on the basis of ternary phase diagrams, and the thickness of the reaction layer was measured using scanning electron microscopy (SEM). The results show that the reaction rate of carbon composite brick with the minerals increased with an increase of the Ca content in the minerals. The results of reaction interface analysis show that the diffusion of Ca~(2+) was the dominant process during reaction. Cation diffusion was considered to be the rate determining step, and this was in agreement with experimental results. Therefore, reducing the ash content of coke, especially the CaO in ash, is the key to reduce the erosion rate of carbon composite bricks below the centerline of taphole.
机译：碳纤维复合材料砖被广泛用于高炉炉膛的热面，因此引起了越来越多的关注。为了降低碳复合砖的侵蚀率并研究焦炭灰对碳复合砖侵蚀的影响，矿物CaO-Al_2O_3，CaO-2Al_2O_3和CaO-6Al_2O_3（CA，CA2和CA6）分别为通过加热CaCO_3和Al_2O_3的混合物制备被认为是炉床中焦炭灰分的主要成分的材料。在高温管式炉中在不同温度下进行了矿物与碳复合砖的结合实验。使用实验前后的质量测量值计算实验组件的质量变化分数。根据三元相图预测不同温度下的反应产物，并使用扫描电子显微镜（SEM）测量反应层的厚度。结果表明，碳复合砖与矿物的反应速率随矿物中钙含量的增加而增加。反应界面分析结果表明，Ca〜（2+）的扩散是反应过程中的主要过程。阳离子扩散被认为是决定速率的步骤，这与实验结果一致。因此，降低焦炭的灰分含量，尤其是降低灰分中的CaO，是降低碳复合砖在出铁孔中心线以下的侵蚀率的关键。

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  • 来源
    《ISIJ international》 |2019年第3期|412-420|共9页
  • 作者

    Yong DENG; Kexin JIAO; Zhengjian LIU; Jianliang ZHANG; Qiangjian SONG;

  • 作者单位

    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083 China,State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 China;

    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083 China,State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 China;

    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083 China,State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 China;

    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083 China,State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 China,School of Chemical Engineering, The University of Queensland, St Lucia, QLD, 4072 Australia;

    School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083 China,State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083 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

    blast furnace; hearth; carbon composite brick; erosion; coke ash;

    机译：高炉;炉碳复合砖侵蚀;焦炭灰;

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