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Title of Journal: Metall and Materi Trans B

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Abbravation: Metallurgical and Materials Transactions B

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Springer US

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DOI

10.1007/978-3-642-67919-3_22

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1543-1916

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A Thermodynamic Model of Sulfur Distribution Ratio

Authors: XueMin Yang ChengBin Shi Meng Zhang GuoMing Chai Fei Wang
Publish Date: 2011/08/24
Volume: 42, Issue: 6, Pages: 1150-1180
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Abstract

A thermodynamic model for calculating the sulfur distribution ratio between ladle furnace LF refining slags and molten steel has been developed by coupling with a developed thermodynamic model for calculating the mass action concentrations of structural units in LF refining slags ie CaO–SiO2–MgO–FeO–MnO–Al2O3 hexabasic slags based on the ion and molecule coexistence theory IMCT The calculated mass action concentrations of structural units in CaO–SiO2–MgO–FeO–Al2O3–MnO slags equilibrated or reacted with molten steel show that the calculated equilibrium mole numbers or mass action concentrations of structural units or ion couples rather than mass percentage of components in the slags can represent their reaction abilities The calculated total sulfur distribution ratio shows a reliable agreement with the measured or the calculated sulfur distribution ratio between the slags and molten steel by other models under the condition of choosing oxygen activity based on FeO–O equilibrium Meanwhile the developed thermodynamic model for calculating sulfur distribution ratio can quantitatively determine the respective contribution of free CaO MgO FeO and MnO in the LF refining slags A significant difference of desulfurization ability among free component as CaO MgO FeO and MnO has been found with approximately 87–93 pct 1143–585 pct 081–060 pct and 030–027 pct at both middle and final stages during LF refining process respectively A large difference of oxygen activity is found in molten steel at the slag–metal interface and in bulk molten steel The oxygen activity in molten steel at the slag–metal interface is controlled by FeO–O equilibrium whereas the oxygen activity in bulk molten steel is controlled by Al–O equilibrium Decreasing the highoxygenactivity boundary layer beneath the slag–metal interface can promote the desulfurization reaction rate effectively or shorten the refining period during the LF refining process

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  2. Investigation into Oxygen-Enriched Bottom-Blown Stibnite and Direct Reduction
  3. Morphological Changes of Panzhihua Ilmenite During Oxidation Treatment
  4. Melting Mechanism of Water-Cooled Billet-Type Bottom Electrode of Direct Current Arc Furnace: A Numerical Approach
  5. Laboratory Carburization of Direct-Reduced Iron in CH 4 -H 2 -N 2 Gas Mixtures, and Comparison with Industrial Samples
  6. Predicting the Effect of Pouring Temperature on the Crystallite Density, Remelting, and Crystal Growth Kinetics in the Solidification of Aluminum Alloys
  7. A Critical Review of the Modified Froude Number in Ladle Metallurgy
  8. A Framework for Soft Sensing of Liquid Pool Length of Continuous Casting Round Blooms
  9. Conditions for the Efficient Crushing of the As-Cast Microstructure of 30Cr10Ni Duplex Stainless Steel
  10. Coating tungsten composites for improved low temperature ductility
  11. Vaporization Studies from Slag Surfaces Using a Thin Film Technique
  12. Analysis of Microstructure Effects on Edge Crack of Thin Strip During Cold Rolling
  13. Separation of Phosphorus- and Iron-Enriched Phase from CaO-SiO 2 -FeO-MgO-P 2 O 5 Melt with Super Gravity
  14. A Study for Initial Solidification of Sn-Pb Alloy during Continuous Casting: Part I. The Development of the Technique
  15. An investigation of the validity of certain tempering parameters
  16. Chemical diffusion in the β phase of the Zr-Ti alloy system
  17. Morphology Control for Al 2 O 3 Inclusion Without Ca Treatment in High-Aluminum Steel
  18. A Semi-empirical Mathematical Model to Estimate the Duration of the Atmosphere within a Double Oxide Film Defect in Pure Aluminum Alloy
  19. Thermal Conductivity of Molten Silicate of Al 2 O 3 -CaO-Na 2 O-SiO 2 Measured by Means of a Front Heating-Front Detection Laser Flash Method
  20. New integration of the Gibbs-Duhem equation and thermodynamics of Pr-Zn alloys
  21. Influence of Turbulent Flows in the Nozzle on Melt Flow Within a Slab Mold and Stability of the Metal–Flux Interface
  22. Freeze-Lining Formation of a Synthetic Lead Slag: Part II. Thermal History
  23. Preparation and Thermal Stability of Ultrafine Nickel Powders Containing hcp-Ni Nanocrystallites Using Liquid-Phase Reduction Method
  24. Viscosity of CaO-MgO-Al 2 O 3 -SiO 2 -TiO 2 Melts Containing TiC Particles
  25. Kinetics of Na 2 O and B 2 O 3 Loss From CaO-SiO 2 -Al 2 O 3 Slags
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  28. A Mechanism Model for Raceway Formation and Variation in a Blast Furnace
  29. Environmental hydrogen embrittlement of an α-β titanium alloy: Effect of microstructure
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  33. Effect of Water Vapor During Secondary Cooling on Hot Shortness in Fe-Cu-Ni-Sn-Si Alloys
  34. Influence of the Processing Route in the Microstructure and Mechanical Properties of NiAl/TiB 2 Composites Produced by Combustion Synthesis
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  37. Thermodynamics of the Formation of MgO-Al 2 O 3 -TiO x Inclusions in Ti-Stabilized 11Cr Ferritic Stainless Steel
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  39. Response to Thermal Exposure of Ball-Milled Aluminum-Borax Powder Blends
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  42. A thermodynamic and experimental study of the electrochemically induced cooling of the anode in hall-héroult cells
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