The Role of Molten Slag in Iron Melting Process for the Direct Contact Carburization: Wetting and Separation

スポンサーリンク

概要

• 論文の詳細を見る

• Rapid iron melting initiation and molten slag separation which take place in carbon composite iron ores are quite interesting phenomena, but their mechanisms have not been established yet. Since the size of carbonaceous material and iron ore particles is tiny in carbon composite iron ores, molten slag can dynamically play a critical role in the iron melting initiation and the slag separation. The behavior of the molten slag was clarified by direct observation of phenomena occurring in a simplified carbon composite agglomerate sample (iron disk–slag particle–graphite or coke particle) via a confocal laser scanning microscope combined with an image furnace. It was found that the molten slag wetting induced the iron melting initiation by attracting graphite or coke to iron and the molten slag separation took place with iron melting propagation. However, the high content of coke ash could suppress the iron melting initiation. In addition, the mechanism of molten slag separation from Fe–C melt was verified by phase field modeling.

• 社団法人 日本鉄鋼協会の論文

著者

• Sasaki Yasushi

  Graduate Institute of Ferrous Technology (GIFT), Pohang University of Science and Technology (POSTEC

• Sasaki Yasushi

  Graduate Inst. Of Ferrous Technol. (gift) Pohang Univ. Of Sci. And Technol. (postech)

• Kim Hyun-Soo

  Graduate Institute of Ferrous Technology (GIFT), Pohang University of Science and Technology (POSTEC

• Kim Jang

  Graduate Institute of Ferrous Technology (GIFT), Pohang University of Science and Technology (POSTEC

関連論文

• Formation of Calcium Ferrites under Controlled Oxygen Potentials at 1273 K
• Bubble Formation Frequency at a Single-hole Nozzle Immersed in a Mercury Bath
• Prediction of the Occurrence of Swirling Liquid Jet Generated by Off-centered Nozzle
• The Coordination of F Ions around Mg and Ca Ions in Molten CaO–CaF2–MgO–SiO2 System at 1873K
• EFFECT OF LOW-DENSITY PARTICLES ON SWIRLING LIQUID JET IN TRANSIENT PERIOD
• The Coordination of F Ions around Al and Ca Ions in Molten Aluminosilicate Systems
• The Role of Ca and Na Ions in the Effect of F Ion on Silicate Polymerization in Molten Silicate System
• The Estimation of the Iso-viscosity Lines in Molten CaF2–CaO–SiO2 System
• Occurrence Condition of a Swirling Bubbling Jet in a Water Bath Covered with an Oil Layer
• Stress Relaxation Behavior with Molten CaO-SiO_2-Al_2O_3 Slag
• The Effect of Grain Boundaries on the Surface Rearrangement during Wustite Reduction within its Range of Existence
• Measuring Strains for Hematite Phase in Sinter by Electron Backscattering Diffraction Method
• The Effect of Grain Boundaries on Iron Nucleation during Wustite Reduction Process
• Rupture Phenomena of Molten Alkali Silicate Thin Films
• Rupture phenomena of molten alkali silicate thinfilms
• The Role of Molten Slag in Iron Melting Process for the Direct Contact Carburization: Wetting and Separation
• Simulation of Effect of Pore Structure on Coke Strength Using 3-dimensional Discrete Element Method
• Reply to “Discussion on the Estimation of the Iso-viscosity Lines in Molten CaF2–CaO–SiO2 System”
• The Surface Structure Correlation with the Wustite Surface Rearrangement
• The Effect of Grain Boundary on the Wustite Reduction Process
• The Surface Structure Correlations with the Iron Nucleation in the Wustite Reduction
• The Surface Structure Correlations with Wustite Reduction Mechanism
• Carbonation Reaction of CaO in Jet Milling of CO2 Gas
• The Role of Iron Oxide Bearing Molten Slag in Iron Melting Process for the Direct Contact Carburization
• Effect of Initial Acceleration History on Transition to Turbulence in Pipe Flow
• Empirical Equations for Bubble Formation Frequency from Downward-Facing Nozzle with and without Rotating Flow Effects
• Raman Spectroscopic Analysis of Molten Na_2O-NaCl-SiO_2 System
• Carburization Degree of Iron Nugget Produced by Rapid Heating of Powdery Iron, Iron Oxide in Slag and Carbon Mixture
• Repulsive Capillary Force between two Plates Linked by a Concave Molten Slag Bridge
• Ejection of small sedimentary particles into a cylindrical bath by swirl motion of bubbling jet (特集 流動の可視化)
• Prediction of Argon Gas Attachment to Sliding Gate in Immersion Nozzle
• Forward and Backward Reaction Rate Constants of the Reaction of C+O=CO (g) on Fe-C Melts
• Enhancement of Iron Melting Rate under the Co-existence of Graphite and Wustite
• Molecular dynamics analysis of the effect of F on the structure of molten Na_2O-NaF-Al_2O_3-SiO_2 system
• Molecular Dynamics Analysis of Three-dimensional Anionic Structures of Molten Al_2O_3-Na_2O-SiO_2 System
• Simulation of Effect of Pore Structure on Coke Strength Using 3-dimensional Discrete Element Method
• The Role of Molten Slag in Iron Melting Process for the Direct Contact Carburization : Wetting and Separation
• Formation of Calcium Ferrites under Controlled Oxygen Potentials at 1273K
• Fabrication of Ultra High Nitrogen Austenitic Stainless Steel by NH_3 Solution Nitriding
• Carbonation Reaction of CaO in Jet Milling of CO_2 Gas
• The Role of Iron Oxide Bearing Molten Slag in Iron Melting Process for the Direct Contact Carburization
• The Coordination of F Ions around Mg and Ca Ions in Molten CaO-CaF_2-MgO-SiO_2 System at 1873K
• Prediction of the Period of Swirl Motion Appearing in Gas Injection Processes at High Temperatures
• Mixing Time in a Bath in the Presence of Swirl Motion Induced by Horizontal Gas Injection with an L-Shaped Lance
• Effect of Repeatedly Imposed Acceleration on the Transition to Turbulence in Transient Circular Pipe Flow
• Model study of the effect of slag layer on the swirl motion of molten steel jet (環境特集号(その1))
• Grain Refinement of α-iron by Repeated Carburizing and Decarburizing Reactions
• Feasibility of Solid-state Steelmaking from Cast Iron : Decarburization of Rapidly Solidified Cast Iron
• Mixing Time in a Cylindrical Bath Agitated by Gas Injection through an L-shaped Top Lance in the Absence of Swirl Motion

もっと見る 閉じる

スポンサーリンク