The Effect of Na_2O and Al_2O_3 on Dephosphorization of Molten Steel by High Basicity MgO Saturated CaO-FeO_x-SiO_2 Slag

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概要

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• Highly basic CaO based slags saturated with MgO have been studied with respect to the phosphate capacity by measuring the phosphorous distribution ratio between slag and metal under controlled oxygen partial pressure at 1823 K and 1873 K. The effect of Na2O and Al2O3 addition and the activity of FeO and FeO1.5 were also determined. The phosphate capacity for MgO saturated CaO-FeOx-SiO2 slag containing 0 to 5 mass% Al2O3 and 0 to 1.75 mass% Na2O at 1873 K are in the range of 1018.37 to 1019.00 and that containing 4.1 to 5.0 mass% Al2O3 and 0 to 2.37 mass% Na2O at 1823 K are in the range of 1018.53 to 1018.62. For the slags containing 21.28 to 23.59 mass% Al2O3 and 0 to 4.25 mass% Na2O at 1823 K are in the range of 1017.84 to 1018.15.The addition of Na2O to the MgO saturated CaO-FeOx-SiO2 system increases the phosphate capacity of the slags. Alumina in the MgO saturated CaO-FeOx-SiO2 system decreases the phosphate capacity of the slags. The addition of Na2O to the MgO saturated CaO-FeOx-SiO2 system decreases the activity coefficients of FeO and FeO1.5 and those of P2O5. The activity coefficients of FeO and FeO1.5 show that they all behave as an acidic oxide in MgO saturated CaO-FeOx-SiO2 system.

• 2005-01-15

著者

• Tsukihashi Fumitaka

  Department Of Advanced Materials Graduate School Of Frontier Science The University Of Tokyo

• Hamano Tasuku

  Department Of Advanced Materials Science Graduate School Of Frontier Sciences The University Of Toky

• Li Guangqiang

  Department Of Advanced Materials Science Graduate School Of Frontier Sciences The University Of Toky

• Li Guangqiang

  Department Of Advanced Materials Science Graduate School Of Frontier Sciences The University Of Toky

• Tsukihashi Fumitaka

  Department Of Advanced Materials Science Graduate School Of Frontier Sciences The University Of Toky

• Tsukihashi Fumitaka

  Department Of Advanced Material Science The University Of Tokyo

関連論文

• Temperature Coefficient of Surface Tension and their Comparison for Molten tin at Different Oxygen Potentials of the Measured Conditions
• The Effect of Na_2O and Al_2O_3 on Dephosphorization of Molten Steel by High Basicity MgO Saturated CaO-FeO_x-SiO_2 Slag
• The Dissolution Rate of Solid Lime into Molten Slag Used for Hot-metal Dephosphorization
• Wettability and Interfacial Permeability between Prereduced Ilmenite and Molten Pig Iron
• Dissolution Behavior of Solid 5CaO・SiO_2・P_2O_5 in CaO-SiO_2-FeO_x Slag
• Condensation of P_2O_5 at the Interface between 2CaO・SiO_2 and CaO-SiO_2-FeO_x-P_2O_5 Slag
• Effect of Simultaneous Addition of Al_2O_3 and MgO on the Liquidus of the CaO-SiO_2-FeO_x System with Various Oxygen Partial Pressures at 1573K
• Reduction Extraction Kinetics of Titania and Iron from an Ilmenite by H_2-Ar Gas Mixtures
• Removal of Antimony from Liquid Copper by Using CuCl-Na_2CO_3 Fluxes at 1423K
• Mechanisms of Oxidation and Vaporization of Antimony from Liquid Copper with CuCl-CaO Fluxes
• Chlorination Kinetics of ZnFe_2O_4 with Ar-Cl_2-O_2 Gas
• Removal of Zn and Pb from Fe_2O_3-ZnFe_2O_4-ZnO-PbO Mixture by Selective Chlorination and Evaporation Reactions
• Evaporation Kinetics of the Molten PbCl_2-ZnCl_2 System from 973 to 1073K
• Oxygen Exchange Reaction between CO_2-CO Gas and Molten Oxide Containing Iron Oxide
• Three-dimensional Compressible Flow Simulation of Top-blown Multiple Jets in Converter
• Exergy Analysis of Steel Production Processes
• Reaction Behavior of P_2O_5 at the Interface between Solid 2CaO・SiO_2 and Liquid CaO-SiO_2-FeO_x-P_2O_5 Slags Saturated with Solid 5CaO・SiO_2・P_2O_5 at 1573K
• Modeling of Three-phase Flows and Behavior of Slag/Steel Interface in an Argon Gas Stirred Ladle
• Large Eddy Simulation on Flow Structure in Centrifugal Flow Tundish
• Formation Reaction of Phosphate Compound in Multi Phase Flux at 1573K
• Partition Equilibria of Lead and Antimony between Liquid Copper and MgO Saturated Cu_2O-SiO_2, Cu_2O-CaO and Cu_2O-CaO-SiO_2 Systems
• Reaction Mechanism between Solid CaO and FeO_x-CaO-SiO_2-P_2O_5 Slag at 1 573K
• Chlorination and Evaporation Behaviors of PbO-PbCl_2 System in Ar-Cl_2-O_2 Atmosphere
• Thermodynamic and Structural Properties for the FeO-SiO_2 System by using Molecular Dynamics Calculation
• Calculation of Thermodynamic Properties and Phase Diagrams for the CaO-CaF_2, BaO-CaO and BaO-CaF_2 Systems by Molecular Dynamics Simulation
• Melting and Solidifying Behaviors of the CaO-SiO_2-FeO_x Slags at Various Oxygen Partial Pressures
• Vapor Pressure Measurements for the FeCl_2-ZnCl_2 System by the Transpiration Method
• Vapor Pressure Measurement of Zinc Oxychloride
• The Activity of Calcium in Calcium-Calcium Halide Fluxes
• Effects of Electromagnetic Brake on Vortex Flows in Thin Slab Continuous Casting Mold
• Vortexing Flow Patterns in a Water Model of Slab Continuous Casting Mold
• Influences of Oxide Additions on Formation Reaction of Iron Carbide at 1023K
• Molecular Dynamics Simulation of the Thermodynamic and Structural Properties for the CaO-SiO_2 System
• Separation of Fe, Co and Ni from molten Ni-based alloy by MgO-saturated FeO_x-MgO-SiO_2 slag
• Distribution Equilibria of Fe, Co and Ni between MgO-saturated FeO_x-MgO-SiO_2 Slag and Ni Alloy
• Effect of Static Magnetic Field Application on the Mass Transfer in Sequence Slab Continuous Casting Process
• Modeling of Circulating Flow in RH Degassing Vessel Water Model Designed for Two-and Multi-legs Operations
• Numerical Estimation of the Effect of the Magnetic Field Application on the Motion of Inclusion in Continuous Casting of Steel
• The Effect of B_2O_3 on Dephosphorization of Molten Steel by FeO_x-CaO-MgO_-SiO_2 Slags at 1873K
• Effect of Rotating Magnetic Field on Two-phase Flow in RH Vacuum Degassing Vessel
• Solubilities of Al2O3, SiO2 and Cr2O3 in the FeS Containing Systems
• Changing Behavior of Non-metallic Inclusions in Solid Iron Deoxidized by Al-Ti Addition during Heating at 1473 K
• Wettability of Sn-Zn, Sn-Ag-Cu and Sn-Bi-Cu Alloys on Copper Substrates
• Current, Magnetic Field and Joule Heating in Electroslag Remelting Processes
• Radiative Heat Transfer Behavior of Mold Fluxes for Casting Low and Medium Carbon Steels
• Effects of the Seaweed Bed Construction Using the Mixture of Steelmaking Slag and Dredged Soil on the Growth of Seaweeds
• Dissolution Mechanism of Various Elements into Seawater for Recycling of Steelmaking Slag
• Interfacial Rate of CO2–CO Reaction with the Solid Iron and Iron Oxide by Isotope Exchange Technique at 1273 K
• Wettability between Molten Slag and MgO–C Refractories for the Slag Splashing Process
• Modeling of Transient Two-Phase Flow in a Continuous Casting Mold Using Euler-Euler Large Eddy Simulation Scheme
• Effect of Nitrogen on the Formation and Evolution of Non-Metallic Inclusions in Fe–Al–Ti–N Alloy
• Equilibrium Partitions of Manganese and Phosphorus between BaO-BaF2 Melts and Carbon Saturated Fe-Mn Melts.
• Phosphorus Partition between CaOsatd.-BaO-SiO2-FetO Slags and Liquid Iron at 1873K.
• Current, Magnetic Field and Joule Heating in Electroslag Remelting Processes
• Equilibrium Distribution Ratios of Phosphorus and Chromium between BaO-MnO Melts and Carbon Saturated Fe-Cr-Mn Alloys at 1 573 K.
• Interfacial Rate of CO_2-CO Reaction with the Solid Iron and Iron Oxide by Isotope Exchange Technique at 1273 K

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