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

doi:10.12068/j.issn.1005-3026.2017.07.011

Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (7): 960-965.DOI: 10.12068/j.issn.1005-3026.2017.07.011

• Materials & Metallurgy • Previous Articles Next Articles

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

REN Qian-qian¹， ZHANG Yu-zhu^1,2， LONG Yue²， ZOU Zong-shu¹

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
About author:-
Supported by:
-

Abstract

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 (T_p1)， 393kJ/mol (T_p2)， respectively.

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

CLC Number:

TF09

REN Qian-qian， ZHANG Yu-zhu， LONG Yue， ZOU Zong-shu. Study of Non-isothermal Crystallization Kinetics of Modified Blast Furnace Slag[J]. Journal of Northeastern University Natural Science, 2017, 38(7): 960-965.

References

[1]Li J，Liu W X，Zhang Y Z，et al.Research on modifying blast furnace slag as a raw material of slag fiber［J］.Materials and Manufacturing Processes，2015，30:374-380.
[2]Gan L，Zhang C X，Zhou J C，et al.Continuous cooling crystallization kinetics of a molten blast furnace slag［J］.Journal of Non-Crystalline Solids，2012，358:20-24.
[3]Yoshiaki K，Toshiki N，Khanh S P.Crystallization behaviors concerned with TTT and CCT diagrams of blast furnace slag using hot thermocouple technique［J］.ISIJ International，2007，47:44-52.
[4]Tang X L，Zhang Z T，Guo M，et al.Viscosities behavior of CaO-SiO₂-MgO-A1₂O₃ slag with low mass ratio of CaO to SiO₂，and wide range of A1₂O₃ content［J］.Journal of Iron and Steel Research，International，2011，18(2):1-6.
[5]Wang Z J，Ni W，Jia Y，et al.Crystallization behavior of glass ceramics prepared from the mixture of nickel slag，blast furnace slag and quartz sand［J］.Journal of Non-Crystalline Solids，2010，356:1554-1558.
[6]Xu W N，Ren J，Chen G R.Glass transition kinetics and crystallization mechanism in Ge-Ga-S-CsCl chalcohalide glasses［J］.Journal of Non-Crystalline Solids，2014，398/399:42-47.
[7]王艺慈，于文武，张建良，等.包钢高炉渣微晶玻璃的析晶动力学及显微结构分析［J］.材料热处理学报，2014，35(1):88-93.(Wang Yi-ci，Yu Wen-wu，Zhang Jian-liang，et al.Crystallization kinetics and microstructure of glass-ceramics prepared from Baotou steel blast furnace slag［J］.Transactions of Materials and Heat Treatment，2014，35(1):88-93.)
[8]Song L，Wu J F，Li Z，et al.Crystallization mechanisms and properties of α-cordierite glass-ceramics from K₂O-MgO-Al₂O₃-SiO₂ glasses［J］.Journal of Non-Crystalline Solids，2015，419:16-26.
[9]Ozawa T.Kinetics analysis of derivative curves in thermal analysis［J］.Journal of Thermal Analysis and Calorimetry，1970，2(3):301-324.
[10]Augis J A，Benett J E.Calculation of the Avrami parameters for heterogeneous solid-state reactions using a modification of the Kissinger method［J］.Journal of Thermal Analysis and Calorimetry，1978，13(2):283-292.

[1]	WANG Hao， CAO Guang-ming， TANG Jun-jian， LIU Zhen-yu. High Temperature Oxidation Behavior of 700MPa Grade High Strength Steel Under Water Vapor Condition [J]. Journal of Northeastern University(Natural Science), 2021, 42(7): 920-926.
[2]	BI Meng-yuan， XIE Ren-yi， ZHANG Yi-fan， YI Hai-long. Microstructure Evolution and Recrystallization Kinetics of CoCrFeNi High Entropy Alloy [J]. Journal of Northeastern University(Natural Science), 2021, 42(7): 933-938.
[3]	FAN Yang-yang， LIU Yan， NIU Li-ping， ZHANG Ting-an. Kinetics of Indium Leaching from High Indium Sphalerite in Oxygen Pressure Acid Leaching Process [J]. Journal of Northeastern University Natural Science, 2019, 40(9): 1257-1262.
[4]	SUN Qian-yu， YIN Wan-zhong， ZHU Zhang-lei， YAO Jin. Adsorption Thermodynamics and Kinetics of Bornite Using Sodium Butyl Xanthate as Collector in Flotation [J]. Journal of Northeastern University Natural Science, 2019, 40(4): 574-579.
[5]	YU Jian-wen， HAN Yue-xin， GAO Peng， LI Yan-jun. Reductive Transformation of Hematite to Magnetite with CO/CO₂ Under Fluidized Bed Conditions [J]. Journal of Northeastern University Natural Science, 2019, 40(2): 261-266.
[6]	JIANG Liang-you， WEI De-zhou， LIU Kai-kai， ZHANG Hao. Kinetics of Bioleaching for Copper Sulfide Ore with Different Grade [J]. Journal of Northeastern University Natural Science, 2019, 40(10): 1491-1495.
[7]	MENG Fan-chao， ZOU Zong-shu. Influence of Thermal Reserve Zone Temperature in Blast Furnace on Gas Utilization Rate [J]. Journal of Northeastern University Natural Science, 2018, 39(7): 985-989.
[8]	HU En-zhu， LI Qiu-yan， GAO Han， WANG Na-na. Removing Methylene Blue from Water by Steel Slag Adsorption [J]. Journal of Northeastern University Natural Science, 2018, 39(4): 516-521.
[9]	BAI Li-mei， DENG Yu-fen， HAN Yue-xin， ZHAO Wen-qing. Thermal Decomposition Process and Kinetics of Micro-fine Magnesite [J]. Journal of Northeastern University Natural Science, 2018, 39(3): 398-403.
[10]	SUN Yong-sheng， CAO Yue， HAN Yue-xin， LI Yan-jun. Oxidation Kinetics of Magnetite During the Cooling Process of Magnetization Roasting [J]. Journal of Northeastern University Natural Science, 2018, 39(12): 1759-1763.
[11]	YU Hai-yan， WANG Jiang-zhou， ZHANG Bai-yong， PAN Xiao-lin. Adsorption Behavior of Oxalate on Al(OH)₃ in Sodium Aluminate Solution [J]. Journal of Northeastern University Natural Science, 2018, 39(10): 1433-1438.
[12]	ZHANG Xiao-fang， LIU Tao， YU Jing-kun， GAO Xiang. Thermal Analysis and Kinetics of La_0.8Sr_0.2(Ga_0.8Mg_0.2)_1-○xFe_○xO_3-○δ○Mixed Conductor [J]. Journal of Northeastern University Natural Science, 2017, 38(9): 1257-1262.
[13]	LI Wei， FU Gui-qin， CHU Man-sheng， ZHU Miao-yong. Phase Transformation and Non-isothermal Oxidation Kinetics of Hongge Vanadium-Bearing Titanomagnetite [J]. Journal of Northeastern University Natural Science, 2017, 38(4): 517-521.
[14]	LYU Guo-zhi， ZHANG Ting-an， KE Xian-yao， ZHANG Wei-guang. Influence of Mechanical Activation on Digestion Performance of Hydrargillite [J]. Journal of Northeastern University Natural Science, 2016, 37(4): 512-516.
[15]	YAO Xi-wen， XU Kai-li， JIA Yan-qiang， ZHANG Xiu-min. Thermogravimetric-Mass Spectrometry Analysis and Pyrolysis Kinetic of Rice Husk and Rice Straw [J]. Journal of Northeastern University Natural Science, 2016, 37(3): 426-430.

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

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments