This article suggests that the sulphide capacity may be a unique property of slag that can be calculated at a given temperature and composition, even for CaO- or Na2O-containing slags where the amount of dissolved sulphides is significant. A structural model that incorporates sulphide ions (S2−) in the silicate network is used to calculate the sulphide capacity of SiO2-Na2O binary and SiO2-Na2O-MO (M = Ca, Mg, Mn, Fe) ternary systems. This structural model considers the effect of substituting one metal oxide for another in ternary systems and uses only the data for the binary subsystems without any ternary adjustable parameter.
Get full access to this article
View all access options for this article.
References
1.
ZhangG-H, ChouK-C, PalU.Estimation of sulfide capacities of multicomponent slags using optical basicity. ISIJ Int. 2013;53:761–767. DOI: 10.2355/isijinternational.53.761.
2.
DerinB, SuzukiM, TanakaT.Sulphide capacity prediction of molten slags by using a neural network approach. ISIJ Int. 2010;50:1059–1063. DOI: 10.2355/isijinternational.50.1059.
3.
ReddyRG, BlanderM.Sulfide capacities of MnO-SiO2 slags. Metall Mater Trans B. 1989;20B:137–140. DOI: 10.1007/BF02825594.
4.
PeltonAD, ErikssonG, Romero-SerranoA.Calculation of sulfide capacities of multicomponent slags. Metall Mater Trans B. 1993;24B:817–825. DOI: 10.1007/BF02663142.
5.
SchramaFNH, BeunderEM, PandaSK, et al.Optimal hot metal desulphurisation slag considering iron loss and sulphur removal capacity part I: fundamentals. Ironmak Steelmak. 2021;48(1):1–13. doi:10.1080/03019233.2021.1882647.
6.
SchramaFNH, BeunderEM, PandaSK, et al.Optimal hot metal desulphurisation slag considering iron loss and sulphur removal capacity part II: validation. Ironmak Steelmak. 2021;48(1):14–24. doi:10.1080/03019233.2021.1882648.
7.
SchramaFNH, BeunderEM, van den BergB, et al.Sulphur removal in ironmaking and oxygen steelmaking. Ironmak Steelmak. 2017;44(5):333–343. doi:10.1080/03019233.2017.1303914.
8.
Moosavi-KhoonsariE, JungI-H.Thermodynamic modelling of sulfide capacity of Na2O-containing oxide melts. Metall Mater Trans B. 2016;47B:2875–2888. DOI: 10.1007/s11663-016-0749-z.
9.
JungI-H, Moosavi-KhoonsariE.Limitations of sulfide capacity concept for molten slags. Metall Mater Trans B. 2016;47B:819–823. doi:10.1007/s11663-016-0594-0.
10.
KangY-B, PeltonAD.Thermodynamic model and database for sulfides dissolved in molten oxide slags. Metall Mater Trans B. 2009;40B:979–994. DOI: 10.1007/s11663-009-9283-6.
11.
LinPL, PeltonAD.A structural model for binary silicate systems. Metall Trans B. 1979;10B:667–675. DOI: 10.1007/BF02662569.
12.
Romero-SerranoA, PeltonAD.Extensions of a structural model for binary silicate systems. Metall Mater Trans B. 1995;26B:305–315. DOI: 10.1007/BF02660973.
13.
GutiérrezJ, Romero-SerranoA, PlascenciaG, et al.Thermodynamic model for ternary silicate systems. ISIJ Int. 2000;40:664–669. DOI: 10.2355/isijinternational.40.664.
14.
Romero-SerranoA, López-RodríguezJ, Hernández-RamírezA, et al.Thermodynamic modelling of sulphide capacity of ternary silicate slags. ISIJ Int. 2021;61:1768–1774. DOI: 10.2355/isijinternational.ISIJINT-2020-676.
15.
FinchamCJB, RichardsonFD.The behaviour of sulphur in silicate and aluminate melts. Proc R Soc London. 1954;223(A):40–62. DOI: 10.1098/rspa.1954.0099.
16.
Romero-SerranoA, Gómez-YáñezC, HallenM, et al.Thermodynamic modelling of alkali metal oxide-silica binary melts. J Ceram Soc. 2005;88:141–145. DOI: 10.1111/j.1551-2916.2004.00022.x.
17.
DessureaultY, PeltonAD.Contribution to the quasichemical model of reciprocal molten salt solutions. J Chim Phys. 1991;88:1811–1830. DOI: 10.1051/jcp/1991881811.
18.
BaleCW, BélisleE, ChartrandP, et al.Factsage thermochemical software and databases, 2010-2016. Calphad. 2016;54:35–53. doi:10.1016/j.calphad.2016.05.002.
19.
KörberF, OelsenW.The basis of the desulfurization of pig iron with soda and sodium silicates (in german). Stahl Eisen. 1938;58:905–914.
20.
ChanAH, FruehanRJ.The sulfur partition ratio and the sulfide capacity of Na2O-SiO2 slags at 1200 °C. Metall Trans B. 1986;17B:491496. DOI: 10.1007/BF02670214.
21.
ChenY, LiuC, CaoH.The sulfur partitions between carbon saturated hot metal and Na2O-SiO2 slags. Eng Chem Metall. 1990;11:87–94.
22.
ChanAH, FruehanRJ.The sulfur partition ratio and the sulfide capacity of Na2O-SiO2 slags at 1400 °C. Metall Trans B. 1988;19B:334–336. DOI: 10.1007/BF02654219.
23.
KunisadaK, IwaiH.Effect of CaO, MnO, MgO and Al2O3 on the sulfide capacities of Na2O-SiO2 slags. ISIJ Int. 1994;33:43–47. DOI: 10.2355/isijinternational.33.43.
24.
InoueR, SuitoH.Sulfur partition between carbon-saturated iron melt and Na2O-SiO2 slags. Trans Iron Steel Inst Jpn. 1982;22:514–523.
25.
DeYoungDH.Sulfide capacity in Na2O-FetO-SiO2 system. Am Chem Soc Div Fuel Chem. 1984;29:117–128.
