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View article: Influence of Crystal Structure and Chemical Composition on the Reducibility of Silico-Ferrite of Calcium and Aluminum in CO–CO<sub>2</sub>–H<sub>2</sub>–H<sub>2</sub>O Atmosphere
Influence of Crystal Structure and Chemical Composition on the Reducibility of Silico-Ferrite of Calcium and Aluminum in CO–CO<sub>2</sub>–H<sub>2</sub>–H<sub>2</sub>O Atmosphere Open
In this study, influence of crystal structure and chemical composition for Silico-Ferrite of Calcium and Aluminum (SFCA) on its reducibility are examined. Eight types of powder samples containing SFCA and SFCA-I were prepared using chemica…
View article: Low Temperature Reduction Mechanism of Carbon-Iron Ore Composite Using Woody Biomass
Low Temperature Reduction Mechanism of Carbon-Iron Ore Composite Using Woody Biomass Open
Utilization of biomass, which is regarded as a carbon neutral fuel, has been discussed to decrease in the carbon dioxide emission from the ironmaking processes. Previous reports insisted the volatile matters in the uncarbonized biomass con…
View article: Influence of Na <sub>2</sub> SO <sub>4</sub> molten salts on the self-healing behavior of Ni/Al <sub>2</sub> O <sub>3</sub> composites
Influence of Na <sub>2</sub> SO <sub>4</sub> molten salts on the self-healing behavior of Ni/Al <sub>2</sub> O <sub>3</sub> composites Open
The objective of this study is to investigate the influence of Na2SO4 molten salt on the self-healing behavior of Ni/Al2O3 for its utilization as the middle pressure ceramic turbine blades of aircraft. Dense 5 vol% Ni/Al2O3 was prepared an…
View article: Effect of Chemical Species of Silicon Oxide on Carburizing and Melting Behaviors of Carbon-Iron Oxide Composite
Effect of Chemical Species of Silicon Oxide on Carburizing and Melting Behaviors of Carbon-Iron Oxide Composite Open
In order to achieve a low-carbon operation of the blast furnace, it is important to promote not only the reduction of iron oxides but also the carburizing and melting of reduced iron. In this study, the use of highly reactive carbon-iron o…
View article: Effect of CaO Component on Strength of Pre-granulated Pellets in Composite Sinter Products
Effect of CaO Component on Strength of Pre-granulated Pellets in Composite Sinter Products Open
Depletion trend of high-grade iron ore resources have become significant due to the recent increase in world steel production. Therefore, effective utilization of low-grade and low-quality ores has been and will be strongly required. Since…
View article: Improvement of High-Temperature Oxidation Resistance of Iron-Base Heat Storage Materials by Aluminizing Using Pack Cementation Method
Improvement of High-Temperature Oxidation Resistance of Iron-Base Heat Storage Materials by Aluminizing Using Pack Cementation Method Open
A new carbonizing and pulverizing process of woody biomass has been proposed, which utilizes sensible heat of industrial flue gas using a heat storage material (HSM). In the present study, Fe–Mn–C alloy was examined as a candidate of HSM, …
View article: Reduction of CO<sub>2</sub> Emissions from Blast Furnace Applying Reactive Coke Agglomerate and Hydrogen Reduction
Reduction of CO<sub>2</sub> Emissions from Blast Furnace Applying Reactive Coke Agglomerate and Hydrogen Reduction Open
The annual CO2 emissions in Japan is approximately 1.1 Gt and the steel industry section accounts for its about 14%. The ratio of the blast furnace (BF) ironmaking process occupies about 70% of the emissions of the steel industry. Therefor…
View article: Reduction of Iron Ore by Uncarbonized Biomass in a Rotary Kiln Type Furnace
Reduction of Iron Ore by Uncarbonized Biomass in a Rotary Kiln Type Furnace Open
Utilization of biomass char, which is regarded as a carbon neutral fuel, has been discussed to decrease in the carbon dioxide emission from the ironmaking processes. However, carbonization usually leads to a significant carbon loss. In thi…
View article: Effect of Ore Type and Gangue Content on Carburization and Melting Behavior of Carbon-Iron Ore Composite
Effect of Ore Type and Gangue Content on Carburization and Melting Behavior of Carbon-Iron Ore Composite Open
In order to reduce energy consumption in the blast furnace ironmaking process, it is important to promote not only rapid reduction of ore but also carburization and melting of metallic iron. In this study, the use of carbon-iron ore compos…
View article: Effect of Silica in Ash of Coke on Carburization and Melting of Iron
Effect of Silica in Ash of Coke on Carburization and Melting of Iron Open
Reducing energy consumption in ironmaking process is essential for decreasing the amount of carbon dioxide emission from the blast furnace process. To effectively reduce carbon dioxide emission, a faster reduction of iron ore, as well as t…
View article: Acceleration of Oxidation Reaction of Iron-bearing Materials Co-existed with Carbonaceous Materials in Iron Ore Sintering Bed
Acceleration of Oxidation Reaction of Iron-bearing Materials Co-existed with Carbonaceous Materials in Iron Ore Sintering Bed Open
Iron ore sintering process occupies approximately 3% of CO2 emission of Japan because a large amount of coke breeze was used as a main agglomeration agent. Therefore, its suppression has been required. One of the promising methods is to re…
View article: Influence of Oxygen Partial Pressure on Oxidation Reaction of Iron-bearing Materials in Iron Ore Sintering Bed
Influence of Oxygen Partial Pressure on Oxidation Reaction of Iron-bearing Materials in Iron Ore Sintering Bed Open
In the sintering process of iron ores, coke breeze is utilized as a main agglomeration agent. Its replacement with iron-bearing materials such as metallic iron scraps and magnetite ore seem to be a promising way to reduce CO2 emissions. Wh…
View article: Effects of Iron Ore Type and Gangue Mineral Components on Strength of Sintered Fine Powder Granule
Effects of Iron Ore Type and Gangue Mineral Components on Strength of Sintered Fine Powder Granule Open
Depletion of high-grade iron ore resources leads to increasing use of ore concentrates as raw materials for sinter. One of the methods to effectively utilize such concentrates is Mosaic EmBedding Iron Ore Sintering (MEBIOS), which pre-gran…
View article: Effect of Hydrogen Concentration in Reducing Gas on the Changes in Mineral Phases during Reduction of Iron Ore Sinter
Effect of Hydrogen Concentration in Reducing Gas on the Changes in Mineral Phases during Reduction of Iron Ore Sinter Open
In order to decrease CO2 emission from the ironmaking process, an increasing use of hydrogen in blast furnace (BF) ironmaking is a promising way. In this case, the properties of iron ore sinter such as reducibility and strength need to be …
View article: Simultaneous Carbonization and Pulverization Behaviors of Woody Biomass by a Rapid Carbonization Process Applying Heat Storage Materials
Simultaneous Carbonization and Pulverization Behaviors of Woody Biomass by a Rapid Carbonization Process Applying Heat Storage Materials Open
A rapid carbonization process of biomass to indirectly utilize exhaust heat by using heat storage materials (HSM) is proposed. In this process, carbonization proceeds by the heat transferred from HSM balls and the simultaneous pulverizatio…
View article: Forming Behavior of Fine Particulate Matters during Iron Ore Sintering Process
Forming Behavior of Fine Particulate Matters during Iron Ore Sintering Process Open
Iron and steelmaking process, especially the iron ore sintering process is regarded as a major fixed generation source of PM2.5.This study aims to obtain fundamental knowledge on the grain size and chemical composition of PM2.5 formed duri…
View article: Development of High Temperature Oxidation Resistant Iron-Based Heat Storage Materials for Rapid Carbonization and Pulverization Process of Biomass
Development of High Temperature Oxidation Resistant Iron-Based Heat Storage Materials for Rapid Carbonization and Pulverization Process of Biomass Open
Utilization of the solid phase transformation heat of the iron-based alloy as well as its sensible heat was proposed as a Heat Storage Materials, HSM, for the rapid carbonization and pulverization process of biomass. Aluminizing of the HSM…
View article: <i>In-situ</i> Evaluation Method for Crack Generation and Propagation Behaviors of Iron Ore Burden during Low Temperature Reduction by Applying Acoustic Emission Method
<i>In-situ</i> Evaluation Method for Crack Generation and Propagation Behaviors of Iron Ore Burden during Low Temperature Reduction by Applying Acoustic Emission Method Open
In the field of ironmaking, there are few in-situ non-destructive techniques for systematically evaluating the reduction behaviors of blast furnace (BF) burden materials. The standard method for the evaluation of the reduction disintegrati…
View article: Influence of Heat Treatment Temperature on Self-healing Effect of Fe Particle/Mullite Ceramic Composites
Influence of Heat Treatment Temperature on Self-healing Effect of Fe Particle/Mullite Ceramic Composites Open
Self-healing function in ceramic-based composites is one of unique characteristics to improve the strength reliability. In this study, such a strength recovery phenomenon of 5 vol% Fe particle/2 mol% Y2O3/Mullite composite was investigated…
View article: Morphology Change and Carburization Characteristic of Iron Ore-Coal Composite During Reduction under a Simulated Condition of Blast Furnace
Morphology Change and Carburization Characteristic of Iron Ore-Coal Composite During Reduction under a Simulated Condition of Blast Furnace Open
Ironmaking process by Blast Furnace (BF) method contributes about 70% of CO2 emission and energy consumption in steel works. To aim at the sustainable development and environmental protection, decreasing CO2 emission and energy consumption…
View article: Effect of Types of Carbonaceous Material and CaO Addition on Reduction Behavior of Pre-reduced Iron Ore–Carbon Composite
Effect of Types of Carbonaceous Material and CaO Addition on Reduction Behavior of Pre-reduced Iron Ore–Carbon Composite Open
Utilization of iron ore-carbon composite for blast furnace has a possibility of the method to decrease carbon dioxide emission from iron and steel industry. Major iron ores consist of Fe2O3, Fe3O4, and FeOOH, which require several reductio…
View article: Intra-Particle Water Migration Dynamics during Iron Ore Granulation Process
Intra-Particle Water Migration Dynamics during Iron Ore Granulation Process Open
The influence of iron ore properties, such as ore type, mineralogical texture, and particle size, on the intra-particle water migration dynamics were evaluated using immersion method. When immersed, ores were reached 68–78% of their final …
View article: Quantitative Evaluation of Reaction Mode and Reduction Disintegration Behavior of Iron Ore Agglomerates during Low Temperature Reduction
Quantitative Evaluation of Reaction Mode and Reduction Disintegration Behavior of Iron Ore Agglomerates during Low Temperature Reduction Open
The utilization of H2 in the ironmaking process is a potential option for a further reduction of CO2 emission from the blast furnace (BF). H2 promotes the reduction reaction of burden materials, but its influence on their reduction disinte…
View article: <i>In-situ</i> Evaluation Method for Crack Generation and Propagation Behaviors of Iron Ore Burden during Low Temperature Reduction by Applying Acoustic Emission Method
<i>In-situ</i> Evaluation Method for Crack Generation and Propagation Behaviors of Iron Ore Burden during Low Temperature Reduction by Applying Acoustic Emission Method Open
In the field of ironmaking, there are few in situ non-destructive techniques for systematically evaluating the reduction behaviors of blast furnace (BF) burden materials. The standard method for the evaluation of the reduction disintegrati…