Selective Crystallization Behavior of CaO-SiO2-Al2O3-MgO-FetO-P2O5 Steelmaking Slags Modified through P2O5 and Al2O3

被引：0
作者：
Zhanjun Wang
Yongqi Sun
Seetharaman Sridhar
Mei Zhang
Min Guo
Zuotai Zhang
机构：
[1] University of Science and Technology Beijing,State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering
[2] Peking University,Department of Energy and Resources Engineering and Beijing Key Laboratory for Solid Waste Utilization and Management, College of Engineering
[3] University of Warwick,Steels Processing Research Centre, Advanced Steel Research Centre, WMG
来源：
Metallurgical and Materials Transactions B | 2015年 / 46卷
关键词：
Differential Scanning Calorimetry; Crystallization Temperature; Differential Scanning Calorimetry Curve; Differential Scanning Calorimetry Measurement; MgFe2O4;
D O I：
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学科分类号：
摘要：
In this study, the selective crystallization behavior of synthetic FetO-rich steelmaking slags modified by P2O5 and Al2O3 additions was explored using non-isothermal differential scanning calorimetry, X-ray diffraction, and field emission scanning electron microscopy techniques. Continuous cooling transformation diagrams of Fe-enriched and P-enriched phases were constructed. It was found that P2O5 addition can suppress the crystallization due to the increasing viscosity caused by increasing degree of polymerization; however, an increase of Al2O3 content accelerated the precipitation of dystectic MgFeAlO4, copolymerized by [AlO4]-tetrahedra and [FeO4]-tetrahedra units. It was also noted that the content of phosphorus in P-enriched phase can reach a high value as 28.71 wt pct for the slags modified by 15.17 wt pct Al2O3. The non-isothermal crystallization kinetics derived from activation energy and the structure of the slags explained by Raman spectra were further analyzed, which was well in accordance with the above analysis.
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页码：2246 / 2254
页数：8
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