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

被引：1
|
作者：
Ren Q.-Q. [1 ]
Zhang Y.-Z. [1 ,2 ]
Long Y. [2 ]
Zou Z.-S. [1 ]
机构：
[1] School of Metallurgy, Northeastern University, Shenyang
[2] College of Metallurgy and Energy, North China University of Science and Technology, Tangshan
来源：
Zhang, Yu-Zhu (zyz@ncst.edu.cn) | 2017年 / Northeast University卷 / 38期
关键词：
Acidity coefficient; Crystal growth index; Crystallization activation energy; Kinetics; Modified blast furnace slag;
D O I：
10.12068/j.issn.1005-3026.2017.07.011
中图分类号：
学科分类号：
摘要：
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 Mk=1.3 and 1.4, the main precipitations are gehlenite and akermanite, and the crystallization activation energies are 469 kJ/mol, 471 kJ/mol (Tp1), 393 kJ/mol (Tp2), respectively. © 2017, Editorial Department of Journal of Northeastern University. All right reserved.
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页码：960 / 965
页数：5
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