Effect of the composition on MgO saturability in secondary metallurgical slag

GU Chao; WANG Min; CAI Xiao-feng; GAN Peng

doi:10.13374/j.issn2095-9389.2018.s1.011

Volume 40 Issue S1

Dec. 2018

Turn off MathJax

Article Contents

Article Navigation > Chinese Journal of Engineering > 2018 > 40(S1): 73-76

GU Chao, WANG Min, CAI Xiao-feng, GAN Peng. Effect of the composition on MgO saturability in secondary metallurgical slag[J]. Chinese Journal of Engineering, 2018, 40(S1): 73-76. doi: 10.13374/j.issn2095-9389.2018.s1.011

Citation:

GU Chao, WANG Min, CAI Xiao-feng, GAN Peng. Effect of the composition on MgO saturability in secondary metallurgical slag[J]. Chinese Journal of Engineering, 2018, 40(S1): 73-76. doi: 10.13374/j.issn2095-9389.2018.s1.011

Citation:

PDF( 347 KB)

Effect of the composition on MgO saturability in secondary metallurgical slag

doi: 10.13374/j.issn2095-9389.2018.s1.011

State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing

Received Date: 2018-02-15
Available Online: 2023-07-18

Abstract

Abstract

A predominantly liquid and MgO saturated slag is preferred in secondary metallurgical processes.It contributes to the mass transfer in molten steel and the extension of the refractory life.In the present study, the saturability of Mg O in quaternary Ca O-Si O₂-Al₂O₃-MgO system in secondary metallurgical slag with low basicity was investigated by commercial thermodynamic software and laboratory experiments.The result shows that in the basicity (Ca O/Si O₂) range of 0.5-1.8, the saturability of MgO fluctuates between2%and 39%and decreases with the increase of basicity.The saturability of MgO increases in the MgO saturated phase periclase (MgO) and forsterite (2MgO·Si O₂) and decreases in the MgO saturated phase spinel (MgO·Al₂O₃) with an increase in Al₂O₃content.Si O₂content has a great effect on the saturability of MgO in lime-silicate slag.Besides, the MgO saturability increases with an increase in temperature.
- MgO saturability,
- FactSage,
- thermodynamic calculations,
- refining slag

FullText(HTML)

References(16)

References

[1]	Zhu S D, Zhang Y C. Comprehensive evaluation of the latest progress of Mg O-C refractories. Refract Lime, 2017, 42 (2) :40 (朱守丹, 張永財.全面評價Mg O--C耐火材料的最新進展.耐火與石灰, 2017, 42 (2) :40)
[2]	Kim Y J, Dong J M. Effect of Fe O and Al2O3on the Mg O solubility in CaO--Si O2-Fe O-Al2O3-Mg O slag system at 1823 K. Steel Res Int, 2012, 83 (9) :852
[3]	Wu Z D. Effect of slag on corrosion properties of Mg O--C refractories. Refract Lime, 2015, 40 (5) :15 (吳占德.渣對Mg O--C耐火材料腐蝕性能的影響.耐火與石灰, 2015, 40 (5) :15)
[4]	Yin X L, Chen M, Wang N, et al. Development of Al2O3-Mg O--CaO refractories for refining ladle. J Iron Steel Res, 2017, 29 (10) :781 (尹雪亮, 陳敏, 王楠, 等.精煉鋼包用Al2O3-Mg O--CaO系復相耐火材料的研發.鋼鐵研究學報, 2017, 29 (10) :781)
[5]	Shim J D, Banya S. Equilibrium of sulfur between liquid iron and FetO--SiO2-CaO-Mg O slags saturated with Mg O. Tetsu-toHagane, 1982, 68:251
[6]	Wu Z, Lan T. Analysis and research of saturated solubility of Mg O in the converter slag. Metall Collect, 2016, 223 (3) :13 (吳政, 蘭天.轉爐渣中Mg O的飽和溶解度分析與研究.冶金叢刊, 2016, 223 (3) :13)
[7]	Liu S H, Fruehan R J, Morales A, et al. Measurement of Fe O activity and solubility of Mg O in smelting slags. Metall Mater Trans B, 2001, 32 (1) :31
[8]	Jung S M. Equilibria of manganese and sulfur between liquid iron and CaO-Si O2--FetO-Mg O-MnO slags saturated with 2CaO·SiO2and Mg O. ISIJ Int, 2003, 43 (2) :216
[9]	Sungmo J, Changhee R, Min D J. Thermodynamic properties of manganese oxide in BOF slags. ISIJ Int, 2002, 42 (1) :63
[10]	Jung S M, Kim S H, Rhee C H, et al. Thermodynamic study on MnO behavior in Mg O-saturated slag containing Fe O. ISIJ Int, 2007, 33 (10) :1049
[11]	Bennett J, Kwong K S. Thermodynamic studies of Mg O saturated EAF slag. Ironmaking Steelmaking, 2013, 37 (7) :529
[12]	Brüggmann C, P9tschke J. Mg O saturation in secondary metallurgical lime-aluminate and lime-silicate slags. Steel Res Int, 2011, 82 (4) :422
[13]	Tsao T, Katayama H G. Sulphur distribution between liquid iron and CaO--Mg O-Al2O3-SiO2slags used for ladle refining. ISIJ Int, 2006, 26 (8) :717
[14]	Seo J D, Suito H. Sulfur distribution between Ca O-Si O2--Al2O3-Mg O slags and liquid iron and solubility of Mg O. Bull Inst Adv Mater Process Tohoku Univ, 1996, 52:23
[15]	Ohta H, Suito H. Deoxidation equilibria of calcium and magnesium in liquid iron. Metall Mater Trans B, 1997, 28 (6) :1131
[16]	Ohta H, Suito H. Activities of SiO2and Al2O3and activity coefficients of FetO and MnO in CaO-SiO2-Al2O3-Mg O slags. Metall Mater Trans B, 1998, 29 (1) :119