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首页> 外文期刊>ISIJ international >Crystallization Behavior of Rutile in the Synthesized Ti-bearing Blast Furnace Slag Using Single Hot Thermocouple Technique
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Crystallization Behavior of Rutile in the Synthesized Ti-bearing Blast Furnace Slag Using Single Hot Thermocouple Technique

机译：单热热电偶技术在含钛高炉渣中金红石的结晶行为

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摘要

The present paper constructed the time-temperature-transformation (TTT) diagram of the synthesized titanium-bearing blast furnace (Ti-BF) slag using single hot thermocouple technique (SHTT) in order to study the crystallization behavior of rutile. A combination of X-ray Diffraction (XRD), Electron Probe Micro Analysis (EPMA) and Scanning Electron Microscope (SEM) equipped with Energy-dispersive X-ray spec-troscopy (EDX) were applied to determine the structure and the composition of the crystals in the synthesized Ti-BF slag. It was found that rutile with rod shape was formed in the wide range of isothermal temperatures from 1 160°C to 1 320°C, and CaMgSi_2O_6, CaAI_2Si_20_8 as well as CaTiSiO_5 were precipitated with further decreasing isothermal temperature. At a fixed isothermal temperature, the diameter of rutile increased slightly, whereas the length of rutile increased linearly with holding time. When increasing the isothermal temperature, the diameter of rutile increased linearly, while the growth rate of the length of rutile initially increased and followed by a decrease with further increasing isothermal temperature. The growth rate of the length of rutile had a maximum value (7.74μm/s) at 1 260°C. The mechanism of crystal growth was also discussed, and the results indicated that rutile with one-dimensional growth was observed in the slag melt.
机译：为了研究金红石的结晶行为，采用单热热电偶技术（SHTT）构造了合成的含钛高炉渣（Ti-BF）的时间-温度-转变（TTT）图。将X射线衍射（XRD），电子探针显微分析（EPMA）和配备了能量色散X射线光谱仪（EDX）的扫描电子显微镜（SEM）结合使用以确定其结构和组成Ti-BF渣中的晶体。发现在等温温度从1160°C到1320°C的宽范围内都形成了棒状金红石，随着等温温度的进一步降低，CaMgSi_2O_6，CaAl_2Si_20_8和CaTiSiO_5析出。在固定的等温温度下，金红石的直径略有增加，而金红石的长度随保持时间线性增加。当提高等温温度时，金红石的直径线性增加，而金红石的长度的生长速率最初增加，然后随着等温温度的进一步升高而降低。在1 260℃下，金红石长度的增长率为最大值（7.74μm/ s）。还讨论了晶体生长的机理，结果表明在熔渣中观察到具有一维生长的金红石。

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  • 来源
    《ISIJ international》 |2011年第9期|p.1396-1402|共7页
  • 作者

    Jing LI; Xidong WANG; Zuotai ZHANG;

  • 作者单位

    Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing, 100871 P.R. China;

    Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing, 100871 P.R. China;

    Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing, 100871 P.R. 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

    Ti-bearing blast furnace slag; rutile; crystallization behavior; TTT diagram; SHTT;

    机译：含钛高炉渣;金红石结晶行为TTT图;SHTT;

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