Effect of FeO-CaO-SiO2-MgO-xAl2O3 Slags with 12.0~26.0 wt.% Al2O3 Content on Dephosphorization of Molten Steel

C. M. Lin; C.W. Yu; W. Wu; C.C. Li; K.L. Chang

doi:10.4028/www.scientific.net/KEM.773.184

Paper Titles

Synthesis and Optical Properties of Dipolar Thiazole Derivatives Incorporating Nitro and Amino Substituents
p.157

The Growth of (00l)-Oriented CeO₂ Buffer Layers on R-Cut Sapphire Substrates for the Epitaxy of Tl-2212 Superconducting Films
p.162

Three-Layer Clad Strip Casting Using a Vertical Type Tandem Twin Roll Caster
p.171

Experimental Study on the Corrosion Behavior of Produced Fluid on J55 Steel during CO₂ Flooding
p.179

Effect of FeO-CaO-SiO₂-MgO-xAl₂O₃ Slags with 12.0~26.0 wt.% Al₂O₃ Content on Dephosphorization of Molten Steel
p.184

Microstructure and Bending Strength of Dissimilar SS400/SUS304 Steels T-Fillet Joint by Gas Metal Arc Welding
p.189

Shear Strength and Fracture Location of Dissimilar A6063 Aluminum Alloy and SUS430 Stainless Steel Lap Joint
p.196

Grain Size Effect on Saddle Phenomenon in V-Bending Process of Thin Sheet Metal
p.202

Research of Urban Rail Transit Vehicle Aluminum Alloy Bolster FSW Welding Technology Based on Thermal-Mechanical Coupling
p.208

HomeKey Engineering MaterialsKey Engineering Materials Vol. 773Effect of FeO-CaO-SiO2-MgO-xAl2O3 Slags with...

Effect of FeO-CaO-SiO₂-MgO-xAl₂O₃ Slags with 12.0~26.0 wt.% Al₂O₃ Content on Dephosphorization of Molten Steel

Abstract:

The purpose of this investigation is to understand the effect of FeO-CaO-SiO₂-MgO-xAl₂O₃ slags with 12.0~26.0 wt.% Al₂O₃ content on dephosphorization of molten steel. The dephosphorization experiments of FeO-CaO-SiO₂-MgO-xAl₂O₃ slags are evaluated by a heater of induction furnace at the temperature of 1823 K. The results show that the dephosphorization ability of FeO-CaO-SiO₂-MgO-xAl₂O₃ slags significantly decreases with the increasing of Al₂O₃ content. The oxidative slag with 12.4 wt.% Al₂O₃ possesses the biggest dephosphorization ability (approximately 82.7%) in all conditions. When the Al₂O₃ content of oxidative slag increases from 12.4 to 25.7 wt.%, the dephosphorization ability decreases from 82.7% to 34.6%. P₂O₅ content of oxidative slag also decreases with the increasing of Al₂O₃ content. The X-ray diffraction (XRD) results reveal that the Fe-based slag with 12.4 wt.% Al₂O₃contains the constituent phases of Fe_xO and Ca₂Al₂SiO₇. As the Al₂O₃ content of Fe-based slag is above 22.1 wt.%, the constituent phase of FeAl₂O₄is generated. The energy-dispersive X-ray spectroscopy (ESD) results verify that the capacity of phosphorus of FeAl₂O₄phase is the worst in all phases. The capacity of phosphorus for each phase is Ca₂Al₂SiO₇ phase > Fe_xO phase > (Fe,Mg)Al₂O₄ phase.

You might also be interested in these eBooks

Applied Engineering, Materials and Mechanics II

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 773)

Pages:

184-188

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.773.184

Citation:

Cite this paper

Online since:

July 2018

Authors:

C. M. Lin*, C.W. Yu, W. Wu, C.C. Li, K.L. Chang

Keywords:

Al₂O₃ Content, Capacity of Phosphorus, Dephosphorization Ability, FeAl₂O₄ Phase, FeO-CaO-SiO₂-MgO-xAl₂O₃ Slags

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] F. Shahbazian, Du Sichen, S. Seetharaman, The effect of addition of Al2O3 on the viscosity of CaO-FeO-SiO2-CaF2 slags, ISIJ Int. 42 (2002) 155-162.

DOI: 10.2355/isijinternational.42.155

Google Scholar

[2] Z. J. Wang, Y. Q. Sun, S. Seetharaman, M. Zhang, M. Guo, Z. T. Zhang, Effect of Al2O3 on the viscosity and structure of CaO-SiO2-MgO-Al2O3-FetO slags, Metall. Mater. Trans. B, 46 (2015) 537-541.

DOI: 10.1007/s11663-015-0303-4

Google Scholar

[3] J. R. Kim, Y. S. Lee, D. J. Min, S. M. Jung, S. H. Yi, Influence of MgO and Al2O3 contents on viscosity of blast furnace type slags containing FeO, ISIJ Int. 44 (2004) 1291-1297.

DOI: 10.2355/isijinternational.44.1291

Google Scholar

[4] H. S. Kim, D. J. Min, J. H. Park, Foaming behavior of CaO-SiO2-FeO-MgOsatd-X (X=Al2O3, MnO, P2O5, and CaF2) slags at high temperatures, ISIJ Int. 41 (2001) 317-324.

DOI: 10.2355/isijinternational.41.317

Google Scholar

[5] L. Lin, Y. P. Bao, M. Wang, H. M. Zhou, Influence of Al2O3 modification on phosphorus enrichment in P bearing steelmaking slag, Ironmak. Steelmak. 41 (2014) 193-198.

DOI: 10.1179/1743281213y.0000000117

Google Scholar

[6] J. Diao, B. Xie, Y. H. Wang, X. Guo, Recovery of phosphorus from dephosphorization slag produced by duplex high phosphorus hot metal refining, ISIJ Int. 42 (2012) 955-959.

DOI: 10.2355/isijinternational.52.955

Google Scholar