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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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1543-1916

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QuasiChemical Viscosity Model for Fully Liquid Sl

Authors: Masanori Suzuki Evgueni Jak
Publish Date: 2013/10/01
Volume: 44, Issue: 6, Pages: 1451-1465
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Abstract

A model is presented that enables viscosities to be predicted reliably over the whole range of compositions and temperatures in the Al2O3CaOMgOSiO2 slag system above liquidus in the temperature range from 1543 K to 2643 K 1270 °C to 2370 °C Experimental procedures and data from the studies reported in the literature have been collected and critically reviewed with particular attention to the viscometry methods and possible contamination of slag samples to select reliable data points for further model development Relevant revised formalism to describe the complex viscosity trends including chargecompensation effect of the Ca2+ and Mg2+ cations on the formation of tetrahedrally coordinated Al3+ was introduced Parameters of the quasichemical viscosity model have been optimized to reproduce within experimental uncertainties most of the selected experimental data in the Al2O3CaOMgOSiO2 system and all subsystems This study is part of the overall development of the selfconsistent viscosity model of the Al2O3CaOFeOFe2O3 MgONa2OSiO2 multicomponent slag systemA previous article1 in this series of two presented the revised formalism of the quasichemical viscosity model2 3 4 5 6 7 This work is undertaken as part of the overall development of the selfconsistent viscosity model of the Al2O3CaOFeOFe2O3MgONa2OSiO2 multicomponent slag system The current article outlines development of the revised viscosity model1 for the Al2O3CaOMgOSiO2 slag system which is a key slag system for a number of metallurgical processes including ironmaking and steelmaking A number of viscosity measurements has been carried out for this system8 9 10 11 12 13 14 15 16 17 18 19 20 21 and its subsystems22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 A critical review of experimental procedures and selection of reliable experimental data is an essential stage of the model development The procedures involved in optimization of the model parameters are reported The comparisons between the viscosities predicted with the current model and selected reliable experimental data demonstrate agreements within experimental uncertainties over a wide range of temperatures and compositions above liquidusThe viscosities in this Al2O3containing system have complex trends in particular they have the characteristic maximum at the Me n+2/n O/Al2O3 ratios around 1 Particular focus in the current article therefore was given to the description and analysis of this characteristic maximum which is attributed to the socalled “chargecompensation effect” commonly explained by the ability of the Al3+ cation to take tetrahedral interstitial between the oxygen anions if the excess negative charge for Al3+ is compensated with alkali or alkaline earth cations such as Ca2+ and Mg2+ and therefore by the formation of the stronger AlOMetal covalent bonds This characteristic maximum was described in the present formalism through the introduction of the probability function expressing proportion of the tetrahedrally coordinated Al3+containing viscous flow structural units The Eyring equation40 41 42 was used in the current quasichemical viscosity model1 2 3 4 5 6 7 it proved to be adequate to develop a reliable viscosity model to reproduce complex viscous behavior of slag systems The viscosity equation and parameters for the Al2O3CaOMgOSiO2 slag and its subsystems and the detail optimization procedures of these parameters are presented in our previous article1 of this series of two articles These model parameters have been optimized using the available experimental viscosity data and some correlations with other physical properties


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Other Papers In This Journal:

  1. Measuring Mechanical Behavior of Steel During Solidification: Modeling the SSCC Test
  2. Investigation into Oxygen-Enriched Bottom-Blown Stibnite and Direct Reduction
  3. Morphological Changes of Panzhihua Ilmenite During Oxidation Treatment
  4. A Thermodynamic Model of Sulfur Distribution Ratio between CaO–SiO 2 –MgO–FeO–MnO–Al 2 O 3 Slags and Molten Steel during LF Refining Process Based on the Ion and Molecule Coexistence Theory
  5. Melting Mechanism of Water-Cooled Billet-Type Bottom Electrode of Direct Current Arc Furnace: A Numerical Approach
  6. Laboratory Carburization of Direct-Reduced Iron in CH 4 -H 2 -N 2 Gas Mixtures, and Comparison with Industrial Samples
  7. Predicting the Effect of Pouring Temperature on the Crystallite Density, Remelting, and Crystal Growth Kinetics in the Solidification of Aluminum Alloys
  8. A Critical Review of the Modified Froude Number in Ladle Metallurgy
  9. A Framework for Soft Sensing of Liquid Pool Length of Continuous Casting Round Blooms
  10. Conditions for the Efficient Crushing of the As-Cast Microstructure of 30Cr10Ni Duplex Stainless Steel
  11. Coating tungsten composites for improved low temperature ductility
  12. Vaporization Studies from Slag Surfaces Using a Thin Film Technique
  13. Analysis of Microstructure Effects on Edge Crack of Thin Strip During Cold Rolling
  14. Separation of Phosphorus- and Iron-Enriched Phase from CaO-SiO 2 -FeO-MgO-P 2 O 5 Melt with Super Gravity
  15. A Study for Initial Solidification of Sn-Pb Alloy during Continuous Casting: Part I. The Development of the Technique
  16. An investigation of the validity of certain tempering parameters
  17. Chemical diffusion in the β phase of the Zr-Ti alloy system
  18. Morphology Control for Al 2 O 3 Inclusion Without Ca Treatment in High-Aluminum Steel
  19. A Semi-empirical Mathematical Model to Estimate the Duration of the Atmosphere within a Double Oxide Film Defect in Pure Aluminum Alloy
  20. 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
  21. New integration of the Gibbs-Duhem equation and thermodynamics of Pr-Zn alloys
  22. Influence of Turbulent Flows in the Nozzle on Melt Flow Within a Slab Mold and Stability of the Metal–Flux Interface
  23. Freeze-Lining Formation of a Synthetic Lead Slag: Part II. Thermal History
  24. Preparation and Thermal Stability of Ultrafine Nickel Powders Containing hcp-Ni Nanocrystallites Using Liquid-Phase Reduction Method
  25. Viscosity of CaO-MgO-Al 2 O 3 -SiO 2 -TiO 2 Melts Containing TiC Particles
  26. Kinetics of Na 2 O and B 2 O 3 Loss From CaO-SiO 2 -Al 2 O 3 Slags
  27. The role of mechanical properties in low-stress fatigue crack propagation
  28. Effect of Current Frequency on Droplet Evolution During Magnetic-Field-Controlled Electroslag Remelting Process Via Visualization Method
  29. A Mechanism Model for Raceway Formation and Variation in a Blast Furnace
  30. Environmental hydrogen embrittlement of an α-β titanium alloy: Effect of microstructure
  31. Effect of Microwave Treatment Upon Processing Oolitic High Phosphorus Iron Ore for Phosphorus Removal
  32. Removal of Phosphorus in Silicon by the Formation of CaAl 2 Si 2 Phase at the Solidification Interface
  33. The effect of prior deformation on the strength and annealing of reverted austenite
  34. Effect of Water Vapor During Secondary Cooling on Hot Shortness in Fe-Cu-Ni-Sn-Si Alloys
  35. Influence of the Processing Route in the Microstructure and Mechanical Properties of NiAl/TiB 2 Composites Produced by Combustion Synthesis
  36. Effect of Acidified Feronia elephantum Leaf Extract on the Corrosion Behavior of Mild Steel
  37. Simulation of the Fluid Flow-Related Phenomena in the Electrolyte of an Aluminum Electrolysis Cell
  38. Thermodynamics of the Formation of MgO-Al 2 O 3 -TiO x Inclusions in Ti-Stabilized 11Cr Ferritic Stainless Steel
  39. A Topologically Based Procedure to Identify Invariant Reactions for Isobaric Multicomponent Phase Diagrams
  40. Response to Thermal Exposure of Ball-Milled Aluminum-Borax Powder Blends
  41. Prediction of Macrosegregation in Steel Ingots: Influence of the Motion and the Morphology of Equiaxed Grains
  42. A thermodynamic and experimental study of the electrochemically induced cooling of the anode in hall-héroult cells
  43. Experimental and Numerical Analysis of the Deformation of a Liquid Aluminum Free Surface Covered by an Oxide Layer During Induction Melting
  44. Investigation on the Effect of Nozzle Number on the Recirculation Rate and Mixing Time in the RH Process Using VOF + DPM Model
  45. Effect of Gas Atmosphere on Carbothermal Reduction and Nitridation of Titanium Dioxide

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