东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (7): 960-965.DOI: 10.12068/j.issn.1005-3026.2017.07.011

• 材料与冶金 • 上一篇    下一篇

调质高炉渣非等温析晶动力学研究

任倩倩1， 张玉柱1,2， 龙跃2， 邹宗树1   

  1. (1. 东北大学 冶金学院， 辽宁 沈阳110819; 2. 华北理工大学 冶金与能源学院， 河北 唐山063009)
  • 收稿日期:2016-02-02 修回日期:2016-02-02 出版日期:2017-07-15 发布日期:2017-07-07
  • 通讯作者: 任倩倩
  • 作者简介:任倩倩(1988-)，女，河北邯郸人，东北大学博士研究生； 张玉柱(1956-)，男，河北南皮人，华北理工大学教授，东北大学兼职博士生导师; 邹宗树(1958-)，男，山东章丘人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金面上项目(51474090)； 河北省科技计划项目(14963808D).

Study of Non-isothermal Crystallization Kinetics of Modified Blast Furnace Slag

REN Qian-qian1， ZHANG Yu-zhu1,2， LONG Yue2， ZOU Zong-shu1   

  1. 1. School of Metallurgy， Northeastern University， Shenyang 110819， China; 2. College of Metallurgy and Energy， North China University of Science and Technology， Tangshan 063009， China.
  • Received:2016-02-02 Revised:2016-02-02 Online:2017-07-15 Published:2017-07-07
  • Contact: ZHANG Yu-zhu
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摘要： 采用Factsage热力学软件模拟了调质高炉渣矿物的析出过程.结合高温综合热分析(DSC)、场发射扫描电镜(SEM)和X射线衍射仪(XRD)研究了调质高炉渣的析晶过程，并根据DSC曲线用Kissinger，Ozawa和Augis-Bennett方程计算出了析晶反应的活化能.借助Augis-Bennett方程计算了晶体生长指数n，确定了晶化机理.结果表明:随着升温速率的增加，调质高炉渣由三维体积析晶逐渐向表面析晶转变，酸度系数为1.3和1.4的调质高炉渣在高温下的主要析出相均为镁黄长石和钙铝黄长石，析晶活化能分别为469kJ/mol；471kJ/mol(Tp1)，393kJ/mol(Tp2).

关键词: 调质高炉渣, 析晶活化能, 晶体生长指数, 酸度系数, 动力学

Abstract: The precipitation process of minerals in modified blast furnace slag was simulated with Factsage software. The crystallization process of modified blast furnace slag was studied by using differential scanning calorimeters (DSC)， field emission scanning electron microscope (SEM) and X-ray diffraction(XRD) techniques. Based on the DSC curves， the crystallization activation energy was calculated by using Kissinger equation， Ozawa equation and Augis-Bennett equation. The crystal growth index n was calculated by using Augis-Bennett equations and the crystallization mechanism was also determined. The results show that with the increasing of heating rate， the modified blast furnace slag is changed from three-dimensional volume crystallization to surface crystallization. For the modified blast furnace slag of M○k=1.3 and 1.4， the main precipitations are gehlenite and akermanite， and the crystallization activation energies are 469kJ/mol， 471kJ/mol (Tp1)， 393kJ/mol (Tp2)， respectively.

Key words: modified blast furnace slag, crystallization activation energy, crystal growth index, acidity coefficient, kinetics

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