Updated on 2025/06/23

写真a

 
KON TATSUYA
 
Organization
Faculty of Engineering Department of Materials Assistant Professor
School of Engineering (Concurrent)
Graduate School of Engineering (Concurrent)
Title
Assistant Professor
External link

Research Areas

  • Nanotechnology/Materials / Metals production and resources production

Research History

  • Kyushu University Faculty of Engineering Department of Materials Science and Engineering  Assistant Professor 

    2022.6 - Present

  • 産業技術総合研究所 磁性粉末冶金研究センター  

    2019.4 - 2022.5

  • Kyushu University 鉄鋼リサーチセンター Specially Appointed Assistant Professor 

    2016.4 - 2019.3

Education

  • Tohoku University   大学院工学研究科   金属フロンティア工学専攻博士課程後期

    2013.4 - 2016.3

  • Tohoku University   大学院工学研究科   金属フロンティア工学専攻博士課程前期

    2011.4 - 2013.3

  • Tohoku University   工学部   材料科学総合学科

    2007.4 - 2011.3

Research Interests・Research Keywords

  • Research theme: Rapid Carbonization of Biomass by Microwave and its Utilization

    Keyword: biomass, micro wave, carbon neutral

    Research period: 2023.4

  • Research theme: Lumpy zone control for next generation hydrogen enriched blast furnace

    Keyword: iron making, blast furnace, lampy zone, softening behavior, numerical simulation

    Research period: 2022.6

  • Research theme: Foaming slag formation mechanism associated with dissolution and reduction

    Keyword: Slag, forming, smelting reduction

    Research period: 2022.6

  • Research theme: Process Numerical Simulation for Magnetite Utilization in Iron Ore Sintering Process

    Keyword: iron making, sintering process, iron ore, magnetite

    Research period: 2022.6

  • Research theme: Development of zero carbon ironmaking method

    Keyword: iron making, hydrogen, zero carbon

    Research period: 2022.6

Awards

  • 研究奨励賞

    2025.3   日本鉄鋼協会  

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

Papers

  • Coercivity of Fe-Mn powders prepared through hydrogen reduction of wet-process-synthesized oxide powders

    Tatsuya Kon, Hiroyuki Hosokawa, Nobuyoshi Imaoka, Kimihiro Ozaki

    JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   551   2022.6   ISSN:0304-8853 eISSN:1873-4766

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER  

    In this study, metallic Fe-Mn soft magnetic powders were produced via hydrogen reduction of the oxide powders consisting of nanoferrites produced by a wet process. The effects of solution concentration and pH value during the wet process on the magnetization and coercivity after the hydrogen reduction were investigated. The experimental results indicated that the solution concentration exhibited no effect on the coercivity, whereas the pH produced a large effect on the coercivity. In the wet process at pH greater than 12, irregular-shaped oxide powders were precipitated. The reduced irregular-shaped metallic Fe-Mn powders showed a small coercivity of approximately 90 A/m. In contrast, at pH = 7-8, both irregular-and plate-shaped oxide powders were precipitated, and the reduced Fe-Mn powders showed a large coercivity of ~& nbsp; 250 A/m. The reduced plate-shaped Fe-Mn powders exhibited smaller grain sizes (diameter: 15.9 mu m) than those of the irregular-shaped Fe-Mn powders (diameter:-~& nbsp; 120-140 mu m), indicating that the plate-shaped Fe-Mn powders exhibited increased coercivities. The plate-shaped metallic powders were produced by the reduction of the plate-shaped oxide powders, which contained ferrihydrite and green rust. These results reveal that the pH value of the wet process changes the oxide shape, which in turn affects the shape and grain size of the metallic Fe-Mn powders. By optimizing the wet process conditions, the coercivity of the Fe-Mn powder was improved to 80.9 A/m, although this value is lower than that of the atomized pure Fe powders.

    DOI: 10.1016/j.jmmm.2022.169110

    Web of Science

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  • Detailed modelling of packed-bed gas clogging due to thermal-softening of iron ore by Eulerian-Lagrangian approach Reviewed

    Shungo Natsui, Shingo Ishihara, Tatsuya Kon, Ko-ichiro Ohno, Hiroshi Nogami

    CHEMICAL ENGINEERING JOURNAL   392   in press   2020.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    Eulerian-Lagrangian numerical scheme is applied for analysing packed-bed-structure constructions involving non-spherical solids, such as metallurgical cokes and ferrous ores, and the high-temperature softening characteristics of such beds. 3D scanning is applied for determining the coke and ore shapes, and a multi-sphere discrete element method is used as the functional scheme for non-spherical solid-particle motion tracking. The transient deformation behaviour of the softening ore is simulated using the advanced discrete element method, and the gas permeability characteristics exhibited by the ore shapes in the ironmaking process are discussed. Based on this model, cases with varied softening behaviour represented by the joint spring coefficient are investigated and the effect of the ore-softening behaviour on the gas permeability is evaluated. It is established that the pathway of the passing rivulet depends upon the softening-ore deformation behaviour.

    DOI: 10.1016/j.cej.2019.123643

  • Influence of Physical Properties of Melt on Liquid Dripping in Packed Bed Analyzed by MPS Method Reviewed

    Kon, Tatsuya, Natsui, Shungo, Ueda, Shigeru, Inoue, Ryo, Ariyama, Tatsuro

    ISIJ INTERNATIONAL   53 ( 4 )   590 - 597   2013.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    The liquid dripping under the cohesive zone influences gas flow and permeability in the lower part of the blast furnace, and it is closely related to blast furnace productivity and operational stability. Especially, liquid distribution and hold-up in the coke packed bed can be mentioned as important phenomena regarding the liquid dripping. Although these phenomena are influenced by the structure of the packed bed and the physical properties of the melt, numerical analysis of blast furnace based on melt properties is difficult. Therefore, in this research, the influence of the physical properties of the melt on liquid flow distribution and hold-up phenomena was studied by modeling the liquid flow in a packed bed and performing numerical analysis based on Moving Particle Semi-implicit (MPS) method, which is one of the particle methods. The results of the analysis clarified the fact that the viscosity of the liquid is the controlling factor for dynamic hold-up, and solid-liquid wettability is the controlling factor for static hold-up.

    DOI: 10.2355/isijinternational.53.590

  • Effect of Pre-Reduced Structures on Deformation and Shrinkage Behavior of Iron Ore Pellets under CO and H<sub>2</sub> Reduction

    Ohno Ko-ichiro, Miyama Isshin, Kon Tatsuya

    ISIJ International   65 ( 6 )   783 - 793   2025.5   ISSN:09151559 eISSN:13475460

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    Language:English   Publisher:The Iron and Steel Institute of Japan  

    <p>In hydrogen-enriched blast furnace operations, the cohesive zone’s coke slits are expected to thin, requiring precise control. The softening behavior of lump ore, iron ore sinter, and pellets is influenced by factors such as reduction degree, gangue composition, and slag viscosity. This study investigates the softening and shrinkage mechanisms of hydrogen-reduced pellets, offering insights into cohesive zone behavior in hydrogen-enriched conditions.</p><p>A load-softening test system with rapid heating and cooling capabilities was used to evaluate the softening temperature range of pre-reduced pellets in an inert N<sub>2</sub> atmosphere. Self-fluxed and acidic pellets were pre-reduced to 70% and 90% using CO and H<sub>2</sub> gases. Structural changes during softening and shrinkage were analyzed using optical microscopy on interrupted samples, with precise temperature control and force application to measure contraction rates.</p><p>Results revealed distinct shrinkage behaviors between self-fluxed and acidic pellets under CO and H<sub>2</sub> reduction. Acidic pellets showed greater and more consistent shrinkage in H<sub>2</sub>, while CO-reduced pellets exhibited gradual shrinkage at higher temperatures. Molten slag, forming around 1050°C, significantly influenced shrinkage. Structural analysis highlighted variations in metallic iron and wüstite distributions, with CO-reduced pellets exhibiting a wider mixed region and pronounced sintering at elevated temperatures.</p><p>Pellets with thicker metallic shells and higher reduction degrees showed greater deformation resistance under high-temperature loading. The mixed metallic iron and wüstite region’s thickness decreased during softening, correlating with molten slag formation. These findings underscore the critical role of mixed region deformation and slag generation in determining the softening behavior of reduced pellets.</p>

    DOI: 10.2355/isijinternational.isijint-2024-405

    Scopus

    CiNii Research

  • Gasification Removal Behaviour of Phosphorus Compounds from High-Phosphorous Iron Ore

    Liu, JZ; Kon, T; Maeda, T; Ohno, KI; Higuchi, K

    STEEL RESEARCH INTERNATIONAL   95 ( 10 )   2024.7   ISSN:1611-3683 eISSN:1869-344X

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    Publisher:Steel Research International  

    The gasification removal behaviour of phosphorus from high-phosphorus iron ore is theoretically and experimentally studied in the temperature range of 400–900 °C under H2 reducing and N2 atmospheres. In the first step, thermodynamic analysis is conducted to reveal the gasification and reaction behaviours of common phosphorus compounds, namely P4O10, FePO4, AlPO4, Ca2P2O7, and Ca3(PO4)2. The results indicate that P4O10, FePO4, and AlPO4 under H2 reducing atmosphere and P4O10 under a N2 atmosphere can be removed by gasification, and the influence of the interaction between the vaporized gases and iron ore should be investigated. Therefore, dephosphorization experiments are performed on simulated iron ores containing P4O10, FePO4, or AlPO4. For the sample containing P4O10, ferric phosphates and iron phosphides are formed under the N2 and H2 reducing atmospheres, respectively, and their formation rates decreases with decreasing temperature, becoming almost stagnant at 400 °C. Moreover, it is confirmed that FePO4 and AlPO4 cannot be removed even when pure H2 is introduced.

    DOI: 10.1002/srin.202400131

    Web of Science

    Scopus

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Presentations

  • 高炉内液相ホールドアップに関する数値解析 Invited

    昆 竜矢

    日本鉄鋼協会 第189回春季講演大会  2025.3 

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    Event date: 2025.3

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

  • Formation of mesh-like fine iron in foaming slag containing iron oxide

    Yuki Tamashiro, Tatsuya Kon, Ko-ichiro Ohno

    CUUTE-2 The Second Symposium on Carbon Ultimate Utilization Technologies for the Global Environment  2024.11 

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    Event date: 2024.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Influence of the Presence of Metallic Iron and Molten Slag in Pre-reduced Lump Ore on the Softening Deformation of Ore Particles

    Ren Nakada, Tatsuya Kon, Ko-ichiro Ohno

    CUUTE-2 The Second Symposium on Carbon Ultimate Utilization Technologies for the Global Environment  2024.11 

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    Event date: 2024.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Hydrogen Reduction of Tungsten Oxide with Microwave Rapid Heating International conference

    Ayana Ono, Alex Ichiro Fujiwara, Jiazhan Liu, Tatsuya Kon, Koichiro Ohno

    The 5th Global Congress Microwave Energy Applications (5GCMEA 2024)  2024.7 

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    Event date: 2024.7

    Language:English   Presentation type:Oral presentation (general)  

  • Investigation of Slag Formation Behavior between Lump Iron Ore and Limestone for Utilization of Lamp Iron Ore in Oxygen Blast Furnace International conference

    @Ko-ichiro Ohno, @Tastuya Kon, @Taro Handa, @Yuki Kawashiri,

    METEC & 6th ESTAD  2023.6 

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    Event date: 2024.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:CCD Congress center, Düsseldorf, Germany   Country:Japan  

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MISC

  • Improvement if gas permeability of the dripping zone in blast furnace Reviewed

    Shigeru Ueda, Tatsuya Kon, Hiroshi Nogami, Shin-ya Kitamura

    Proceedings of Aisia Seel International Conference 2015   2015.10

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    Language:English  

    Improvement if gas permeability of the dripping zone in blast furnace
    1606

  • Multi-phase flow simulation in blast furnace by MPS-SMAC coupling model

    Tatsuya Kon, Shigeru Ueda, Nobuhiro Maruoka, Hiroshi Nogami

    AISTech - Iron and Steel Technology Conference Proceedings   2015.1

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    Language:Others  

    Multi-phase flow simulation in blast furnace by MPS-SMAC coupling model

  • Improvement of Productivity of Blast Furnace under Low-Carbon Rate Operation Reviewed

    Shigeru Ueda, Tatsuya Kon, Hiroshi Nogami, Shinya Kitamura

    European steel environment & enery congress(ESEC) 2014   2014.9

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    Language:English  

    Improvement of Productivity of Blast Furnace under Low-Carbon Rate Operation

  • MPS法による充填構造が液相挙動に与える影響の解析

    昆竜矢, 夏井俊悟, 植田滋, 井上亮, 有山達郎

    材料とプロセス(CD-ROM)   2013.9

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    Language:Japanese  

    MPS法による充填構造が液相挙動に与える影響の解析

  • 離散要素法を用いた充填層内の粉体運動解析

    菊地辰, 夏井俊悟, 昆竜矢, 植田滋, 井上亮, 有山達郎

    材料とプロセス(CD-ROM)   2013.3

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    Language:Japanese  

    離散要素法を用いた充填層内の粉体運動解析

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Industrial property rights

Patent   Number of applications: 2   Number of registrations: 1
Utility model   Number of applications: 0   Number of registrations: 0
Design   Number of applications: 0   Number of registrations: 0
Trademark   Number of applications: 0   Number of registrations: 0

Professional Memberships

  • 日本金属学会

  • 日本鉄鋼協会

  • 日本エネルギー学会

Academic Activities

  • The 5th Global Congress on Microwave Energy Applications (5GCMEA)

    Role(s): Planning, management, etc.

    Prof. Yoshio Nikawa  2024.7

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    Type:Competition, symposium, etc. 

Research Projects

  • Development of novel RE-Fe-N soft magnetic materials for high frequency (10-100 MHz)

    Grant number:21K04165  2021 - 2023

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Kon Tatsuya

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    Grant type:Scientific research funding

    In this study,  novel soft magnetic materials can be used in high-frequency device were investigated the synthesis of materials and their mechanisms. This is due to the fact that electronic devices are becoming more frequencies, and there are no soft magnetic materials available for high frequency. If materials that can be used at 10 to 100 MHz are put into practical use, they will be able to make a significant contribution to the miniaturization and performance of devices. In order to solve this problem, RE-Fe-N soft magnetic materials were synthesized and evaluated their magnetic properties. These
    were fabricated alloy ingots by arc melting method, synthesized multiple materials by nitriding after pulverization, and evaluated their magnetic properties at high frequencies. The new material achieves a magnetic permeability of 10 or more at 10 MHz.

    CiNii Research