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Sulfide Capacity of CaO–SiO2–MgO–Al2O3–BaO–Na2O Slag at 1773 K

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Abstract

Employing low-quality raw materials to lower steel production costs is an effective way for many iron and steel enterprises to achieve the sustainable development in China. Meanwhile, this also raises higher requirement for the desulfurization ability of blast furnace slag with diverse components. In this work, the effect of Na2O on the sulfide capacity of CaO–SiO2-10wt% MgO-12wt% Al2O3-2wt% BaO slag was studied at 1773 K by employing the gas–slag equilibrium technique. The distribution of bridged oxygen (O0), non-bridged oxygen (O−), and free oxygen (O2−) in slag was analyzed by XPS. The results indicated that the sulfide capacity increased constantly with Na2O content rising from 0 to 5wt% due largely to an increase in the activity of O2−. Na+ would be consumed to compensate preferentially the [AlO4]-tetrahedron structural units to maintain electrical neutrality of molten slag, releasing some Ca2+ ions for sulfur stabilization. Assuming that the activity of O2− and the stability of S2− in molten slag were proportional to the activity of CaO and the activity coefficient of CaS, respectively, the increased range of the activity of CaO was larger than that of the activity coefficient of CaS on the whole, which improved the sulfide capacity of slag. XPS analysis indicated that the relative fraction of free oxygen and non-bridged oxygen increased gradually, and bridged oxygen showed a decreasing trend, which supported the changes of sulfide capacity based on the dominant effect for free oxygen on sulfide capacity.

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References

  1. Li ZL, Dai HC, Song JN, Sun L, Geng Y, Lu K, Hanaoka T (2019) Assessment of the carbon emissions reduction potential of China’s iron and steel industry based on a simulation analysis. Energy 183:279–290

    Article  Google Scholar 

  2. Guo JL, Bao YP, Wang M (2018) Steel slag in China: treatment, recycling, and management. Waste Manage 78:318–330

    Article  Google Scholar 

  3. Wang ZJ, Sohn I (2019) A review on reclamation and reutilization of ironmaking and steelmaking slags. J Sustain Metall 5:127–140

    Article  Google Scholar 

  4. Hasanbeigi A, Arens M, Price L (2014) Alternative emerging ironmaking technologies for energy-efficiency and carbon dioxide emissions reduction: a technical review. Renew Sustain Energy Rev 33:645–658

    Article  CAS  Google Scholar 

  5. Fincham CJB, Richardson FD (1954) The behaviour of sulphur in silicate and aluminate melts. Proc R Soc A223:40–62

    Google Scholar 

  6. Wang Y, Yang SF, Li JS, Wang F, Gu Y (2017) Cyclic use of ladle furnace refining slag for desulfurization. J Sustain Metall 3:274–279

    Article  Google Scholar 

  7. Moosavi-Khoonsari E, Jung IH (2016) Thermodynamic modeling of sulfide capacity of Na2O-containing oxide melts. Metall Mater Trans B 47:2875–2888

    Article  CAS  Google Scholar 

  8. Allertz C, Selleby M, Sichen D (2016) The effect of oxygen potential on the sulfide capacity for slags containing multivalent species. Metall Mater Trans B 47:3039–3045

    Article  CAS  Google Scholar 

  9. Kim KD, Huh WW, Min DJ (2014) Effect of FeO and CaO on the sulfide capacity of the ferronickel smelting slag. Metall Mater Trans B 45:889–896

    Article  CAS  Google Scholar 

  10. Park GH, Yang YB, Park JH (2011) Sulfide capacity of the CaO-SiO2-MnO slag at 1873K. ISIJ Int 51:1375–1382

    Article  Google Scholar 

  11. Yan ZM, Lv XW, Pang ZD, He WC, Liang D, Bai CG (2017) Transition of blast furnace slag from silicate based to aluminate based: sulfide capacity. Metall Mater Trans B 48:2607–2614

    Article  CAS  Google Scholar 

  12. Park Y, Min DJ (2016) Sulfide capacity of CaO-SiO2-FeO-Al2O3-MgOsatd. Slag ISIJ Int 56:520–526

    Article  CAS  Google Scholar 

  13. Chan AH, Fruehan RJ (1989) The sulfur partition ratio with Fe-CSAT melts and the sulfide capacity of CaO-SiO2-Na2O-(Al2O3) slags. Metall Mater Trans B 20:71–76

    Article  Google Scholar 

  14. Chan AH, Fruehan RJ (1986) The sulfur partition ratio and the sulfide capacity of Na2O-SiO2 slags at 1200℃. Metall Mater Trans B 17:491–496

    Article  CAS  Google Scholar 

  15. Chol JY, Kim DJ, Lee HG (2011) Reaction kinetics of desulfurization of molten pig iron using CaO-SiO2-Al2O3-Na2O slag systems. ISIJ Int 41:216–224

    Google Scholar 

  16. Tong ZF, Qiao JL, Jiang XY (2017) Hot metal desulfurization kinetics by CaO-Al2O3-SiO2-MgO-TiO2-Na2O slags. ISIJ Int 57:245–253

    Article  CAS  Google Scholar 

  17. Liu WG, Xing XD, Zuo HB (2020) Effect of TiO2 on viscosity and sulfide capacity of blast furnace slag containing barium. ISIJ Int 60:1886–1891

    Article  CAS  Google Scholar 

  18. Liu WG, Zuo HB (2021) Effect of MnO and substituting CaO with BaO on the desulfurization ability of blast furnace slag. Metall Mater Trans B. https://doi.org/10.1007/s11663-021-02187-6

    Article  Google Scholar 

  19. Ju JT, Liu WG, Xing XD, Wang J, An JL (2016) Sulphide capacity of CaO-SiO2-8%MgO-Al2O3-BaO slags ranging from 0% to 5% in BaO. Metall Res Technol. https://doi.org/10.1051/metal/2018077

    Article  Google Scholar 

  20. Zhen YL, Zhang GH, Tang XL, Chou KC (2014) Influences of Al2O3/CaO and Na2O/CaO ratios on viscosities of CaO-Al2O3-SiO2-Na2O melts. Metall Mater Trans B 45:123–130

    Article  CAS  Google Scholar 

  21. Wang ZJ, Sohn I (2018) Effect of substituting CaO with BaO on the viscosity and structure of CaO-BaO-SiO2-MgO-Al2O3 slags. J Am Ceram Soc 101:4285–4296

    Article  CAS  Google Scholar 

  22. Wang WL, Shao HQ, Zhou LJ, Luo H, Wu HF (2020) Rheological behavior of the CaO-Al2O3-based mold fluxes with different Na2O contents. Ceram Int 46:26880–26887

    Article  CAS  Google Scholar 

  23. Choi JS, Min DJ (2019) Cationic effect of ferrous ions on sulfide capacity of CaO-FetO-Al2O3-SiO2 slag system. Metall Mater Trans B 50:2758–2768

    Article  CAS  Google Scholar 

  24. Waseda Y, Toguri JM (1998) The structure and properties of oxide melts. World Scientific, Singapore, pp 1–3

    Book  Google Scholar 

  25. Duffy JA, Ingram MD (1971) Establishment of an optical scale for Lewis basicity in inorganic oxyacids, molten salts, and glasses. J Am Ceram Soc 93:6448–6454

    CAS  Google Scholar 

  26. Mills KC, Sridhar S (2013) Viscosities of ironmaking and steelmaking slags. Ironmak Steelmak 26:262–268

    Article  Google Scholar 

  27. Zhang L, Zhai BY, Wang WL, Sohn I (2021) Effects of (CaO + BaO)/Al2O3 ratio on the melting, crystallization, and melt structure of CaO-Al2O3-10wt%-SiO2-based mold fluxes for advanced high-strength steels. J Sustain Metall. https://doi.org/10.1007/s40831-021-00358-y

    Article  Google Scholar 

  28. Choi JS, Park Y, Lee S, Min DJ (2018) Cationic effect of charge compensation on the sulfide capacity of aluminosilicate slags. J Am Ceram Soc 101:2856–2867

    Article  CAS  Google Scholar 

  29. Lee S, Min DJ (2018) Investigation of sulfide capacity of aluminosilicate slag based on ionic structure considerations. J Am Ceram Soc 101:634–643

    Article  CAS  Google Scholar 

  30. Kim JB, Sohn I (2013) Influence of TiO2/SiO2 and MnO on the viscosity and structure in the TiO2-MnO-SiO2 welding flux system. J Non-Cryst Solids 379:235–243

    Article  CAS  Google Scholar 

  31. Xing XD, Pang ZG, Zheng JL, Du YL, Ren S, Ju JT (2020) Effect of MgO and K2O on high-Al silicon-manganese alloy slag viscosity and structure. Minerals. https://doi.org/10.3390/min10090810

    Article  Google Scholar 

Download references

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Number U1960205)

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, People’s Republic of China

    Wenguo Liu, Yanbiao Chen, Jingsong Wang & Haibin Zuo

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  1. Wenguo Liu
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  2. Yanbiao Chen
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  3. Jingsong Wang
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Correspondence to Haibin Zuo.

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The contributing editor for this article was Mansoor Barati.

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Liu, W., Chen, Y., Wang, J. et al. Sulfide Capacity of CaO–SiO2–MgO–Al2O3–BaO–Na2O Slag at 1773 K. J. Sustain. Metall. 7, 1169–1177 (2021). https://doi.org/10.1007/s40831-021-00411-w

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