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首页> 外文期刊>ISIJ international >Effect of Pre-reduction Degree on Softening Behavior of Simulant Sinter Iron Ore
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Effect of Pre-reduction Degree on Softening Behavior of Simulant Sinter Iron Ore

机译：预缩减程度对模拟烧结铁矿石软化行为的影响

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摘要

Reduction test under load is normally applied to evaluate softening and melting behaviour of ferrous burdens at simulated condition in cohesive zone in blast furnace. Outcomes from this test are very complex because they depend on reduction degree, chemical composition, basicity, melts physical property, etc. One of the reasons to make complex this test is sample for the test provided as particle packed bed. In order to comprehend softening and melting behaviour of cohesive zone, focus on behaviour of single particle as a component of particle packed bed in this study. For simplification, a pre-reduced simulant sinter iron ore was prepared as single tablet sample. The samples were made from mixture of reagent oxides and they were pre-reduced to control their reduction degree to several reduction levels. The tablet sample was rapidly heated up to 900°C, and then gradually heated up with 10°C/min under inert gas atmosphere and 0.1 MPa load. Shrinkage degree of the sample was measured during the softening and melting test, and quenched sample was made at certain temperature when the sample shows a characteristic tendency. Cross-sectioning observation of the quenched sample provided mineral phases distribution in the tablet sample. The observation indicated that peripheral structure has a significant effect on deformation resistance. Especially in there, existence of molten slag phase could make easy to deform the sample particle shape, and metallic solid Fe phase helped to strengthen the particle's deformation resistance.
机译：通常应用载荷下的减少试验，以评价含铁沉淀在高炉内粘性区模拟条件下的乳剂和熔化行为。从该测试的结果非常复杂，因为它们依赖于还原程度，化学成分，碱度，熔化物理性质等。作出复杂该测试的原因之一是作为颗粒包装床提供的试验的样品。为了理解粘性区的软化和熔化行为，将单粒子作为本研究中颗粒包装床的组分的特征。为了简化，制备预先降低的模拟剂烧结铁矿石作为单片样品。样品由试剂氧化物的混合物制成，它们预先降低，以控制其还原程度至几种还原水平。将片剂样品快速加热至900℃，然后在惰性气体气氛下用10℃/ min逐渐加热，0.1MPa负荷。在软化和熔化试验期间测量样品的收缩程度，当样品显示特征倾向时，在一定温度下进行淬火样品。淬火样品的横截面观察为片剂样品中的矿物相分布提供。观察结果表明外周结构对变形抗性具有显着影响。特别是在那里，熔融渣相的存在可以容易地变形样品颗粒形状，并且金属固体Fe相有助于增强颗粒的变形性。

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  • 来源
    《ISIJ international》 |2020年第7期|1520-1527|共8页
  • 作者

    Ko-ichiro OHNO; Hirokazu KONISHI; Takashi WATANABE; Shingo ISHIHARA; Shungo NATSUI; Takayuki MAEDA; Kazuya KUNITOMO;

  • 作者单位

    Department of Materials Science and Engineering Faculty of Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan;

    Division of Materials and Manufacturing Science Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan;

    Dept. of Materials Science and Engineering School of Materials and Chemical Technology Tokyo Institute of Technology 2-12-1 Ookayama Meguro-ku Tokyo 152-8550 Japan;

    Institute of Multidisciplinary Research for Advanced Materials Tohoku University Katahira 2-1-1 Aoba-ku Sendai 980-8577 Japan;

    Institute of Multidisciplinary Research for Advanced Materials Tohoku University Katahira 2-1-1 Aoba-ku Sendai 980-8577 Japan;

    Department of Materials Science and Engineering Faculty of Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan;

    Department of Materials Science and Engineering Faculty of Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan;

  • 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

    cohesive zone; softening behavior; simulant sinter iron ore; rapid heating and quenching; deformation resistance; pre-reduced sample; mineral phases distribution;

    机译：凝聚区;软化行为;模拟烧结铁矿石;快速加热和淬火;变形抗性;预先降低样品;矿物阶段分布;

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