Effect of MgO on formation and crystallization behaviors of calcium ferrite during heating and cooling processes

Nan Yang, Xing Min Guo, Noritaka Saito, Kunihiko Nakashima, Jie Ting Zhao

研究成果: ジャーナルへの寄稿記事

抄録

MgO is one of essential component in blast furnace slag for improving the fluidity and desulfurization. Generally it is added via sintering process. It has been also proved in practice that the addition of MgO affects the quality of sinter significantly. However, the effect of MgO on formation and crystallization behaviors of calcium ferrite in sintering had been scarcely discussed. In this work, the crystalline products in CaO-Fe2O3 system with different content of MgO were identified by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). In order to follow the reactions during heating and cooling, differential scanning calorimetry (DSC) was also conducted. It was found that addition of MgO restrained the formation of CaFe2O4 leading to the decrease in content of original melt during sintering process. The contents of Ca2Fe2O5 and solid solution of magnetite (magnetite s.s) were increased and the crystallization of Ca2Fe2O5 was also promoted with increasing MgO. Compared with forming Ca2Fe2O5, addition of MgO facilitated to form magnetite s.s. Content of initial liquid phase was decreased with increasing MgO, whereas new liquid phase was generated at 1 609 K when the content of MgO exceeded 7 mass%, due to the reaction between Ca2Fe2O5 and magnetite.

元の言語英語
ページ(範囲)1406-1412
ページ数7
ジャーナルisij international
58
発行部数8
DOI
出版物ステータス出版済み - 8 15 2018

Fingerprint

Ferrosoferric Oxide
Magnetite
Crystallization
Ferrite
Calcium
Cooling
Heating
Sintering
Fluidity
Liquids
Desulfurization
Slags
Energy dispersive spectroscopy
Differential scanning calorimetry
Solid solutions
Crystalline materials
X ray diffraction
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

これを引用

Effect of MgO on formation and crystallization behaviors of calcium ferrite during heating and cooling processes. / Yang, Nan; Guo, Xing Min; Saito, Noritaka; Nakashima, Kunihiko; Zhao, Jie Ting.

:: isij international, 巻 58, 番号 8, 15.08.2018, p. 1406-1412.

研究成果: ジャーナルへの寄稿記事

@article{ebbfa67f5d134d3f801882a2644e6297,
title = "Effect of MgO on formation and crystallization behaviors of calcium ferrite during heating and cooling processes",
abstract = "MgO is one of essential component in blast furnace slag for improving the fluidity and desulfurization. Generally it is added via sintering process. It has been also proved in practice that the addition of MgO affects the quality of sinter significantly. However, the effect of MgO on formation and crystallization behaviors of calcium ferrite in sintering had been scarcely discussed. In this work, the crystalline products in CaO-Fe2O3 system with different content of MgO were identified by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). In order to follow the reactions during heating and cooling, differential scanning calorimetry (DSC) was also conducted. It was found that addition of MgO restrained the formation of CaFe2O4 leading to the decrease in content of original melt during sintering process. The contents of Ca2Fe2O5 and solid solution of magnetite (magnetite s.s) were increased and the crystallization of Ca2Fe2O5 was also promoted with increasing MgO. Compared with forming Ca2Fe2O5, addition of MgO facilitated to form magnetite s.s. Content of initial liquid phase was decreased with increasing MgO, whereas new liquid phase was generated at 1 609 K when the content of MgO exceeded 7 mass{\%}, due to the reaction between Ca2Fe2O5 and magnetite.",
author = "Nan Yang and Guo, {Xing Min} and Noritaka Saito and Kunihiko Nakashima and Zhao, {Jie Ting}",
year = "2018",
month = "8",
day = "15",
doi = "10.2355/isijinternational.ISIJINT-2018-028",
language = "English",
volume = "58",
pages = "1406--1412",
journal = "ISIJ International",
issn = "0915-1559",
publisher = "Iron and Steel Institute of Japan",
number = "8",

}

TY - JOUR

T1 - Effect of MgO on formation and crystallization behaviors of calcium ferrite during heating and cooling processes

AU - Yang, Nan

AU - Guo, Xing Min

AU - Saito, Noritaka

AU - Nakashima, Kunihiko

AU - Zhao, Jie Ting

PY - 2018/8/15

Y1 - 2018/8/15

N2 - MgO is one of essential component in blast furnace slag for improving the fluidity and desulfurization. Generally it is added via sintering process. It has been also proved in practice that the addition of MgO affects the quality of sinter significantly. However, the effect of MgO on formation and crystallization behaviors of calcium ferrite in sintering had been scarcely discussed. In this work, the crystalline products in CaO-Fe2O3 system with different content of MgO were identified by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). In order to follow the reactions during heating and cooling, differential scanning calorimetry (DSC) was also conducted. It was found that addition of MgO restrained the formation of CaFe2O4 leading to the decrease in content of original melt during sintering process. The contents of Ca2Fe2O5 and solid solution of magnetite (magnetite s.s) were increased and the crystallization of Ca2Fe2O5 was also promoted with increasing MgO. Compared with forming Ca2Fe2O5, addition of MgO facilitated to form magnetite s.s. Content of initial liquid phase was decreased with increasing MgO, whereas new liquid phase was generated at 1 609 K when the content of MgO exceeded 7 mass%, due to the reaction between Ca2Fe2O5 and magnetite.

AB - MgO is one of essential component in blast furnace slag for improving the fluidity and desulfurization. Generally it is added via sintering process. It has been also proved in practice that the addition of MgO affects the quality of sinter significantly. However, the effect of MgO on formation and crystallization behaviors of calcium ferrite in sintering had been scarcely discussed. In this work, the crystalline products in CaO-Fe2O3 system with different content of MgO were identified by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). In order to follow the reactions during heating and cooling, differential scanning calorimetry (DSC) was also conducted. It was found that addition of MgO restrained the formation of CaFe2O4 leading to the decrease in content of original melt during sintering process. The contents of Ca2Fe2O5 and solid solution of magnetite (magnetite s.s) were increased and the crystallization of Ca2Fe2O5 was also promoted with increasing MgO. Compared with forming Ca2Fe2O5, addition of MgO facilitated to form magnetite s.s. Content of initial liquid phase was decreased with increasing MgO, whereas new liquid phase was generated at 1 609 K when the content of MgO exceeded 7 mass%, due to the reaction between Ca2Fe2O5 and magnetite.

UR - http://www.scopus.com/inward/record.url?scp=85051496133&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85051496133&partnerID=8YFLogxK

U2 - 10.2355/isijinternational.ISIJINT-2018-028

DO - 10.2355/isijinternational.ISIJINT-2018-028

M3 - Article

AN - SCOPUS:85051496133

VL - 58

SP - 1406

EP - 1412

JO - ISIJ International

JF - ISIJ International

SN - 0915-1559

IS - 8

ER -