Kyushu University Academic Staff Educational and Research Activities Database
Researcher information (To researchers) Need Help? How to update
Ko-ichiro Ohno Last modified date:2023.05.27

Professor / Metallurgical Physical Chemistry
Department of Materials Science and Engineering
Faculty of Engineering


Graduate School
Undergraduate School
Other Organization


E-Mail *Since the e-mail address is not displayed in Internet Explorer, please use another web browser:Google Chrome, safari.
Homepage
https://kyushu-u.pure.elsevier.com/en/persons/ko-ichiro-ohno
 Reseacher Profiling Tool Kyushu University Pure
https://www.ironmaking.kyushu-u.ac.jp/
Web site of "Ohno Lab. in Dept. of Materials, Faculty of Eng. Kyushu Univ. " .
Fax
092-802-2990
Academic Degree
Doctor of Engineering
Country of degree conferring institution (Overseas)
No
Field of Specialization
Reaction engineering for material processing
Total Priod of education and research career in the foreign country
01years00months
Outline Activities

We primarily focus on the engineering involved in the birth of iron, a widely used and valuable material in society. Our research aims to enhance and optimize the steelmaking process while also providing insights based on a broad perspective and knowledge concerning various challenges such as global environmental issues, resource scarcity, and energy problems. To contribute to the construction of a carbon-neutral society aligned with the Sustainable Development Goals (SDGs), it is crucial to achieve decarbonization and zero-carbonization in the steelmaking process. The main source of carbon dioxide emissions in the ironmaking process is the use of coal-derived coke as a reducing agent to reduce iron oxide present in iron ore. In our laboratory, we are dedicated to developing technologies that replace coal, a fossil fuel, with green energy such as hydrogen, as well as exploring new steelmaking processes that entirely eliminate the use of fossil fuels. From the perspective of resource security, expanding the utilization of previously unusable low-quality ores to produce high-quality iron consistently is also considered an important challenge. To address these issues, we conduct research and education using reaction kinetics, transport phenomena, and thermodynamics as fundamental disciplines, while employing high-temperature experimental techniques and numerical simulation tools.
Research
Research Interests
  • Foaming slag formation mechanism associated with dissolution and reduction
    keyword : Slag, forming, smelting reduction
    2019.04~2024.03.
  • Process Numerical Simulation for Magnetite Utilization in Iron Ore Sintering Process
    keyword : iron making, sintering process, iron ore, magnetite
    2020.04~2025.03.
  • Rapid Carbonization of Biomass by Microwave and its Utilization
    keyword : biomass, micro wave, carbon neutral
    2023.04~2026.03.
  • Development of zero carbon ironmaking method
    keyword : iron making, hydrogen, zero carbon
    2021.04~2030.03.
  • Lumpy zone control for next generation hydrogen enriched blast furnace
    keyword : iron making, blast furnace, lampy zone, softening behavior, numerical simulation
    2020.04~2024.03.
  • Pretreatment of High P iron ore for ironmaking process with microwave heating method
    keyword : Hydrogen, High P Iron ore, Microwave heating
    2018.04~2024.03.
  • Reduction behavior of High S iron ore by H2 with microwave heating method
    keyword : Hydrogen, High S Iron ore, Microwave heating
    2016.04~2019.03.
  • Formation mechanism of carbon fiber from CO-H2 gas with metallic iron catalyst

    keyword : Hydrogen, Carbon fiber, Iron catalyst, Cementite
    2014.04~2020.03.
  • Wetting behavior of molten iron on carbonaceous materials in ironmaking process
    keyword : Molten iron, Carbonaceous material, Wettability, Physical property of molten, contact angle
    2015.04.
  • Visualization of softening and melting behavior in high temperature metallurgical process
    keyword : iron making, blast furnace, cohesive zone, slag-metal separation
    2015.04.
  • Investigation about development of resource-unconstrained sintering process
    keyword : iron making, sintering process, iron ore, resource-unconstrained
    2011.04~2016.03.
  • Investigation of ironmaking technology using microwave heating system
    keyword : iron making, microwave heating, rare metal
    2011.04~2024.03.
  • Utilization technology development of wooden biomass for ironmaking process using by new simulator of cohesive zone in blast furnace
    keyword : iron making, blast furnace, cohesive zone, biomass, slag-metal separation
    2012.04~2016.03.
  • Effective utilization of biomass's char from EU and Japan in iron making process
    keyword : iron making process, reduction, gasification, iron melting due to carburization, organic wastes
    2010.10~2023.03.
  • Investigation of the rare metals recovery from scrap by using biphasic separation technique of Fe-Cu alloy
    keyword : Scrap, Tramp element, rare metals, recycle
    2008.07~2015.03.
  • Enhancement of carburization reaction in blast furnace
    keyword : cohesive zone, carburization, slag, smelting reduction
    2007.04.
  • Effect of carbon crystallinity on ironmaking reaction
    keyword : reduction reaction, carburization reaction, melting reaction of reduced iron, carbon crystallinity
    2006.12carburization.
  • Effective utilization of organic wastes for carburizaiton source in iron making process
    keyword : iron making process, iron melting due to carburization, organic wastes
    2006.10~2011.03.
  • Rapid In-Flight Reduction of Fine Iron Ore Transported by CH4 Gas
    keyword : CH4 gas, rapid reduction, fine iron ore
    2006.04~2007.03.
  • Oxidation behavior of stainless steel at high temperature
    keyword : Oxide
    2006.04~2012.03.
  • High efficiency producing technique of kish graphite
    keyword : kish graphite
    2006.04~2007.03.
  • Mechanism of direct reduced iron making process during rapid heating
    keyword : carburization behavior
    2003.04~2006.03.
Current and Past Project
  • The objective of the project is to develop a technology utilizing rapid microwave pyrolysis for the application of unutilized biomass and waste plastics, converting them into biomass char and bio-oil in a fast and short time. This aims to enable storage and transportation, transforming them into valuable carbon compounds.
  • Investigation about development of resource-unconstrained sintering process

    keyword:
    iron making, sintering process, iron ore, resource-unconstrained
Academic Activities
Books
1. Thomas Echterhof, Ko-ichiro OHNO, Ville-Valtteri Visuri, Special Issue "Modeling and Simulation of Metallurgical Processes in Ironmaking and Steelmaking", MDPI, ISBN 978-3-0365-5154-8, 2022.09.
Papers
1. Ginichiro Sato, Tatsuya Kon, Ko-ichiro Ohno , Effect of gangue mineral in the fine particles on compressive strength of iron ore granules, The 1st International Symposium on Iron Ore Agglomerates (SynOre2022) , 176-178, 2022.11.
2. Thomas Echterhof, Ko-ichiro OHNO, Ville-Valtteri Visuri , Modeling and Simulation of Metallurgical Processes in Ironmaking and Steelmaking, Metals, https://doi.org/10.3390/met12071185, 12, 7, 1185, 2022.07.
3. Ko-ichiro OHNO, Takayuki Maeda, Kazuya KUNITOMO, Masashi Hara, Effect of FeO concentration in sinter iron ore on reduction behavior in a hydrogen-enriched blast furnace, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-022-2480-x, 29, 1820-1829, 2022.08.
4. Ziming WANG, Shunsuke TSUTSUMI, Takayuki Maeda, Ko-ichiro OHNO, Kazuya KUNITOMO, Coke Combustion Rate with the Presence of Hematite in Quasi-particles, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2021-253, 61, 12, 2964-2970, 2021.12.
5. Ko-ichiro OHNO, Taro HANDA, Yuki Kawashiri, Takayuki Maeda, Kazuya KUNITOMO, Slag Formation Behaviour at Interface between Pre-reduced Lump Iron Ore and CaO under Load Conditions, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2021-253, 61, 12, 2953-2963, 2021.12.
6. Ko-ichiro OHNO, Preface to the Special Issue on “Development and Comprehension of Novel Experimental Technology for High Temperature Processing”, ISIJ International, https://doi.org/10.2355/isijinternational.61.2865, 61, 12, 2865-2865, 2021.12.
7. Shingo ISHIHARA, Ko-ichiro OHNO, Hirokazu KONISHI, Takashi WATANABE, Shungo NATSUI, Hiroshi NOGAMI and Junya Kano, Prediction of Softening Behavior of Simulant Sinter Ore by ADEM-SPH Model, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2020-078, 60, 7, 1545-1550, 2020.07.
8. Ko-ichiro OHNO, Hirokazu KONISHI, Takashi WATANABE, Shingo ISHIHARA, Shungo NATSUI, Takayuki MAEDA and Kazuya KUNITOMO, Effect of Pre-reduction Degree on Softening Behavior of Simulant Sinter Iron Ore, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2020-040, 60, 7, 1520-1527, 2020.07.
9. Ko-ichiro OHNO, Yoshiki KITAMURA, Sohei SUKENAGA, Sungo NATSUI, Takayuki MAEDA and Kazuya KUNITOMO, Gas Permeability Evaluation of Granulated Slag Particles Packed Bed during Softening and Melting Stage with Fanning’s Equation, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2020-012, 60, 7, 1512-1519, 2020.07, Negative effect from low coke rate operation at cohesive zone is obvious because it makes thinning of coke slit thickness. Correct knowledge about gas permeability of cohesive layer is becoming more and more important. In order to precisely understand cohesive behaviour, a softening and melting simulator under rapid heating and quenching conditions was applied for clarify a determinant factor of gas permeability behaviour. To focus on softening and melting behaviour, granulated slag particle bed layer without iron oxide was prepared as packed bed sample layer can show softening and melting. The packed bed slag samples in graphite crucible were rapidly heated up to 1200°C, and then gradually heated up to 1500°C with 10°C/min under inert gas atmosphere and 0.1 MPa load. Gas pressure drop and shrinkage degree of the sample layer were measured during the softening and melting test, and quenched sample was made at certain temperature when the maximum gas pressure drop was measured. The CT observation of the quenched sample provided 3D shape information of gas path shape in sample packed bed. Gas pressure drop was estimated with fanning’s equation with the gas path information. The estimation values were shown positive correlation with measured maximum pressure drop. The CT observation also gave triple line length among molten slag, graphite, and gas. Combination the triple line length and molten slag surface tension could use for evaluation of static force balance when maximum pressure drop obtained..
10. Shungo Natsui, Shingo Ishihara, Tatsuya Kon, Ko-ichiro Ohno, Hiroshi Nogami, Detailed modelling of packed-bed gas clogging due to thermal-softening of iron ore by Eulerian-Lagrangian approach, CHEMICAL ENGINEERING JOURNAL, 10.1016/j.cej.2019.123643, 392, 2020.07, 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..
11. #Ahmadreza Amini, @Ko-Ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Effect of sulfur on hydrogen-reduction behavior of iron oxide during microwave heating, Minerals Engineering, 10.1016/j.mineng.2020.106198, 148, 106198, 2020.03, Hydrogen-reduction behavior of a high-sulfur magnetite sample was investigated in the presence of CaO under microwave irradiation at 1050 W and 2.45 GHz to clarify the effect of sulfur on the microwave-assisted reduction reaction of iron oxides. Results of the microscope observations showed a gap between the reduced metallic iron and its surrounding, which is a high-sulfur iron oxide. Formation of such a gap is likely attributed to a lower microwave absorbability of the reduced Fe than the sulfur-contained iron oxide which results in a different thermal expansion in the phases during microwave heating. Such a gap in the high-sulfur magnetite sample enhances the hydrogen-reduction reaction as compared with a pure magnetite sample owing to higher gas accessibility to un-reacted parts in the former sample..
12. Shungo Natsui, Kazui Tonya, Hiroshi Nogami, Tatsuya Kikuchi, Ryosuke O. Suzuki, Ko Ichiro Ohno, Sohei Sukenaga, Tatsuya Kon, Shingo Ishihara, Shigeru Ueda, Numerical study of binary trickle flow of liquid iron and molten slag in coke bed by smoothed particle hydrodynamics, Processes, 10.3390/pr8020221, 8, 2, 221, 2020.02, © 2020 by the authors. Licensee MDPI, Basel, Switzerland. In the bottom region of blast furnaces during the ironmaking process, the liquid iron and molten slag drip into the coke bed by the action of gravity. In this study, a practical multi-interfacial smoothed particle hydrodynamics (SPH) simulation is carried out to track the complex liquid transient dripping behavior involving two immiscible phases in the coke bed. Numerical simulations were performed for different conditions corresponding to different values of wettability force between molten slag and cokes. The predicted dripping velocity changes and interfacial shape were investigated. The relaxation of the surface force of liquid iron plays a significant role in the dripping rate; i.e., the molten slag on the cokes acts as a lubricant against liquid iron flow. If the attractive force between the coke and slag is smaller than the gravitational force, the slag then drops together with the liquid iron. When the attractive force between the coke and slag becomes dominant, the iron-slag interface will be preferentially detached. These results indicate that transient interface morphology is formed by the balance between the momentum of the melt and the force acting on each interface..
13. Shungo Natsui, Shingo Ishihara, Tatsuya Kon, @Ko-Ichiro Ohno, Hiroshi Nogami, Detailed modelling of packed-bed gas clogging due to thermal-softening of iron ore by Eulerian–Lagrangian approach, Chemical Engineering Journal, 10.1016/j.cej.2019.123643, Article in press, 2019.12, 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..
14. #Ahmadreza Amini, @Ko-Ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, A kinetic comparison between microwave heating and conventional heating of FeS-CaO mixture during hydrogen-reduction, Chemical Engineering Journal, 10.1016/j.cej.2019.05.226, 374, 648-657, 2019.10, Kinetics of iron production via hydrogen-reduction of FeS-CaO mixture during both microwave heating and conventional heating was investigated at 750, 570, and 460 °C to clarify the effect of heating method on dominant rate-controlling mechanism. Results of conventional heating revealed that the rate controlling step during treatment in the first 500 s at 750 °C, 800 s at 570 °C, and 1000 s at 460 °C is interfacial chemical reaction; then it is changed to gas diffusion in micro pores of reduced Fe owing to the formation of Fe shell on the surface of FeS particles. In microwave treatment, the interfacial chemical reaction is rapidly progressed and gas diffusion is the dominant rate-controlling mechanism with an activation energy of 22.3 kJ.mol−1. This study demonstrated that the microwave irradiation enhances the rate of chemical reaction during iron production from FeS-CaO mixture..
15. Ko-ichiro Ohno, Shinya Miura, Takayuki Maeda, Kazuya Kunitomo, Effect of carbonaceous material surface texture on iron carburization reaction under loading condition, isij international, 10.2355/isijinternational.ISIJINT-2018-383, 59, 4, 655-659, 2019.04, Scrap melting process is one of biggest energy required process in the ironmaking process with EAF. Carbon based scrap melting process has a potential problem about CO2 emission. An aim of this study is finding an optimal surface texture of carbon source for scarp melting with reaction acceleration. Combinations between pure iron cylindrical block and several kinds of carbonaceous materials were evaluated with isothermal condition at 1 673 K and keeping contact each other with loading condition. In order to avoid effect from object lower temperature range, rapid heating and quenching condition was applied to reach to 1 673 K. As different surface texture carbonaceous material’s samples, coke, charcoal from eucalyptus and graphite were prepared. The coke needed obvious longer time to melt iron sample than other carbonaceous materials. It is indicated that coke ash has an obvious effect to prevent carbon transportation at reaction interface. Although charcoal has a better carbon structure for carburization reaction than graphite, the charcoal showed almost similar time for the melting as graphite. An effective contact area on interface of iron and carbon samples was estimated from surface observation by laser microscope and SEM-EDS. The effective area was decreased by existing of ash, porosity, and roughness. Decreasing of the effective contact area had obvious effect on carburization reaction as melting start temperature rising..
16. Kazuto Nishihiro, Takayuki Maeda, Ko-ichiro Ohno, Kazuya Kunitomo, Effect of H2 concentration on carbon deposition reaction by CO–H2 gas mixture at 773 K to 973 K, isij international, 10.2355/isijinternational.ISIJINT-2018-393, 59, 4, 634-642, 2019.04, CO–H2 gas mixture is often used for gas-based DRI process where carbon deposition reaction and Fe3C metal dusting play negative roles for a stable reduction operation. Fe3C decomposition leads to the formation of iron particles which is a catalyst for carbon fiber deposition. Because of the parallel occurrence of these reactions, kinetic analysis of them would be complicated. In the present study, to simplify the kinetic analysis, quantitative analysis of carbon fiber deposition was conducted by using thermobalance. A powdery iron sample was prepared by reduction of Fe2O3 with 100vol%H2 at 673 K. Carbon deposition on the iron sample was investigated under flowing 100%CO, 90vol%CO-10vol%H2, 75vol%CO-25vol%H2, 50vol%CO-50vol%H2, 25vol%CO-75vol%H2 and 10vol%CO-90vol%H2 gas mixtures at 773 K, 873 K and 973 K. Results showed that amount of the deposited carbon in the CO–H2 gas mixture are larger than that in the pure CO gas. The largest amount of deposited carbon was obtained in 75vol%CO-25vol%H2 gas mixture at 873 K. According to SEM observations and weight change measurements, carbon was deposited in fiber shape on the iron surface and amount of it was increased linearly with an increase in sample’s weight change. The rate constant of carbon fiber deposition was calculated considering Rideal mechanism with focusing on elementary reaction steps. It was found that the rate constant of the hydrogen-oxygen reaction step was the largest indicating a significant effect of hydrogen on promoting carbon deposition 773 K and 873 K. This would be due to the removing oxygen from CO by hydrogen on the iron catalyst..
17. Ahmadreza Amini, Takayuki Maeda, Ko-ichiro Ohno, Kazuya Kunitomo, Carbothermic reduction behavior of FeS in the presence of CaO during microwave irradiation, isij international, 10.2355/isijinternational.ISIJINT-2018-391, 59, 4, 672-678, 2019.04, Carbothermic reduction of FeS in the presence of CaO was experimentally studied by employing a multi-mode microwave generator at 1 050 W and 2.45 GHz as an external heat source to mitigate CO2 and SO2 emissions. According to XRD analysis, an ion exchange reaction between FeS and CaO was initiated at temperatures lower than 645°C and progressed by a further heating to 850°C without any evidence for the onset of a reduction reaction. Detection of Fe phase in the XRD pattern of sample heated to 920°C and existence of CO/CO2 in the off-gas during microwave treatment demonstrated that the reduction reaction initiates at ca. 850°C. It was found that the onset of reduction reaction promotes the ion exchange reaction by FeO consumption via reduction to Fe. Moreover, optical microscope and SEM-EDX observations showed that carbon can be absorbed by metallic iron to make molten iron particles at 1 290°C..
18. Masaru Matsumura, Toru Takayama, Kyosuke Hara, Yasuhide Yamaguchi, Osamu Ishiyama, Kenichi Higuchi, Seiji Nomura, Taichi Murakami, Miyuki Hayashi, Ko-ichiro Ohno, Improvement of sinter strength and reducibility through promotion of magnetite ore oxidation by use of separate granulating method, isij international, 10.2355/isijinternational.ISIJINT-2018-518, 59, 5, 768-777, 2019.01, In general, Fe content in iron ore is gradually decreasing. This fact affects worse performance of BF operation, for example, increase of RAR and Slag ratio. Depletion of high grade iron ore deposits is moving us to use concentrates in sintering process. Through magnetite concentration deteriorates reducibility because of high FeO content in sinter product. Such situation makes it to promote oxidation of magnetite iron ore during sintering process for improving sinter reducibility. In addition, promoting oxidation of magnetite possibly increases sinter strength with using oxidation heat. ISIJ sinter research group for utilization of magnetite concentration suggests that restricting melt formation is critical for promoting oxidation of magnetite concentration. In this paper, It is confirmed that “Separate Granulation” has been examined to apply their suggestion by sinter pot test. The main results obtained are described as follows: (1) “Separate Granulation” in case that magnetite is pre-granulated with high Al2O3 iron ore without limestone and coke breeze resulted in decrease of FeO in sinter and improvement of both sinter reducibility and sinter strength. (2) Sinter micro structure featured restriction of pore, low circle factor and small mineral texture, which supported that melting restriction worked during sintering. (3) Magnetite decreased and hematite increased as sinter mineral, which corresponded with decrease of FeO content. (4) These facts shown (1) to (3) concluded that “Separate Granulation” is effective to improve both sinter reducibility and sinter strength due to restriction of melting during sinter reaction..
19. A. Amini, K. Ohno, T. Maeda, K. Kunitomo, K. Kashimura, H2-reduction behavior of FeS-CaO mixture during microwave heating, 17th International Conference on Microwave and High Frequency Heating, AMPERE 2019 AMPERE 2019 - 17th International Conference on Microwave and High Frequency Heating, 10.4995/Ampere2019.2019.9775, 357-364, 2019.01, Kinetics of iron production via hydrogen-reduction of FeS-CaO mixture during microwave heating was investigated at 750, 570, and 460 °C to clarify the dominant rate-controlling mechanism. Results revealed that the interfacial chemical reaction is rapidly progressed during microwave irradiation and gas diffusion is the dominant rate-controlling mechanism with an activation energy of 22.3 kJ.mol-1. This study demonstrated that the microwave irradiation enhances the rate of chemical reaction during iron production from FeS-CaO mixture..
20. Ahmadreza Amini, Ko-Ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Effect of the Ratio of Magnetite Particle Size to Microwave Penetration Depth on Reduction Reaction Behaviour by H2, Scientific reports, 10.1038/s41598-018-33460-5, 8, 1, 2018.12, In this study, we investigated reduction of magnetite by H2 during microwave irradiation. This process combines the advantages of microwave irradiation and using H2 as a reducing agent to mitigate CO2 emissions during the ironmaking process. Weight change measurements showed that a reduction of 75% was achieved after treatment under H2 for 60 min. For better understanding of the effective parameters in microwave chemistry, scanning electron microscopy, combined with energy-dispersive X-ray spectroscopy (SEM-EDX), was performed, which demonstrated a greater reduction of large particles (>40 μm) than small particles. This behaviour could be attributed to the higher microwave absorption capability of large particles with a higher ratio of particle size to penetration depth (d/δ). Small particles behave as transparent material and are heated via conduction and/or convection; thus, there is no contribution from the catalytic effect of microwaves to the reduction reaction. Moreover, the reduction of Fe3O4 to Fe0.94O, followed by transformation to Fe, seems to proceed from the surface toward the centre of the particle despite the volumetric microwave heating. This could be due to the higher gas accessibility of iron oxide on the particle surface than in the particle centre..
21. A. Amini, Ko-Ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Interaction between Microwaves and Fe3O4 Particles at Temperatures Lower than the Curie point, Proceedings of 12th Symposium of Japan Society of Electromagnetic Wave Energy Applications, Article Number: 2A08, 2018.11.
22. A. Amini, Ko-Ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Coupling of Magnetite Particles with Microwaves at Temperatures lower than the Curie Point, Proceedings of 9th International Symposium on Electromagnetic Processing of Materials, EPM 2018, 10.1088/1757-899X/424/1/012042, 424, 1, Article number 012042, 2018.10.
23. A. Amini, Ko-Ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Effect of particle size and apparent density on the initial stages of temperature increase during the microwave heating of Fe3O4, Powder Technology, 10.1016/j.powtec.2018.06.047, 338, 101-109, 2018.10, Effect of the particle size and apparent density on the time required for the initial temperature increase during the microwave heating of Fe3O4 was investigated to clarify the mechanism of interaction between the magnetite powder and microwave at temperatures lower than the Curie point of Fe3O4 (585 °C). Samples in the form of powders and briquettes (density, 3.3 g/cm3) with particle sizes of 75–150 μm, 45–75 μm, and 3O4 at temperatures higher than the Curie point is different in the presence and absence of a strong electric field. This is attributed to a change in the heating mechanism from dielectric loss in the presence of the E-field to Joule loss in its absence. At temperatures lower than the Curie point, some of the small particles would be transparent owing to a greater penetration depth of the microwaves, which causes an early onset of temperature increase in the magnetite sample with a larger particle size. Moreover, the mechanism for the formation of spark and plasma during the microwave-induced heating is discussed by applying a novel approach to analyse the interactions between the powdery materials and microwaves..
24. Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Yusuke Morita, Kohei Sunahara, Tsunehisa Nishimura, Kenichi Higuchi, Apparent Softening Viscosity Measurement of Granulated Slag Packed Bed With Softening And Melting Simulator, Proceedings of 8th International Congress on the Science and Technology of Ironmaking (ICSTI2018), Article Number: 86, 2018.09.
25. Ahmadreza AMINI, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, MAGNETITE REDUCTION by H2 DURING MICROWAVE HEATING
, Proceedings of 8th International Congress on the Science and Technology of Ironmaking (ICSTI2018), Article Number: 69, 2018.09.
26. Kazuto Nishihiro, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, KINETIC ANALYSIS OF CARBON FIBER DEPOSITION ON CATALYST IRON IN CO-H2 MIXTURE GAS, Proceedings of 8th International Congress on the Science and Technology of Ironmaking (ICSTI2018), Article Number: 109, 2018.09.
27. Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Apparent softening viscosity measurement of slag packed bed under loading condition, Proceedings of 10th Japan-Brazil Symposium on Dust Processing-Energy-Environment in Metallurgical Industries, USB配布, 2018.09.
28. Shungo Natsui, Ko-ichiro Ohno, Sohei Sukenaga, Tatsuya Kikuchi, Ryosuke O. Suzuki , Detailed Modeling of Melt Dripping in Coke Bed by DEM – SPH, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2017-496, 58, 2, 282-291, 2018.02.
29. Ko-ichiro OHNO, Research activity of softening and melting simulator with rapid heating and quenching operation, Proceedings of he Twelfth Korea-Japan Workshop on Science and Technology in Ironmaking and Steelmaking, USB Memory, 2017.11.
30. Lei Shao, Ko-Ichiro Ohno, Ying Xia Qu, Zong Shu Zou, A theoretical model for assessing the influence of n2 on gaseous reduction of iron ores with CO or H2, ISIJ International, 10.2355/isijinternational.ISIJINT-2017-436, 58, 2, 370-372, 2018.01, The influence of N2 on gaseous reduction of iron ores has yet to be investigated more rigorously. A generalized theoretical model for iron ore reduction that is featured with equimolar counterdiffusion of gaseous reactant and product in the presence of an inert component is derived in the current paper, where the influence of N2 is quantitatively assessed in terms of a normalized overall reduction rate. The results show that N2 impacts CO reduction of iron ores mainly via the prevailing mechanism of dilution effect and the sole use of DAB in the corresponding ternary system brings merely minor errors. In contrast, especially under conditions of high N2 fraction and reduction degree, the effect of mass diffusion must be borne in mind for H2 reduction and the sole use of DAB can lead to marked errors. The main novelty of the present work is the derivations of the theoretical equations fully following the Maxwell-Stefan relation for multicomponent diffusion and the wellknown concept of topochemical reaction for gaseous reduction of iron ores. It is hoped that the brief discussion will stimulate further application of the theoretical equations to the development of more versatile models and to studies of the engineering type..
31. Ko-ichiro OHNO, Shinya Miura, Takayuki Maeda, Kazuya Kunitomo, Melting behaviour observation of iron contacted with different kinds of carbonaceous materials under loading condition, Proceedings of EMECR2017, 368-371, 2017.10.
32. Ko-ichiro OHNO, Cao Son Nguyen, Takayuki Maeda, Kazuya Kunitomo, Role of Carbon Dissolution Reaction in the Initial Contact Period of Carbon-unsaturated Fe-C Sample Wetting on Graphite Substrate
, Proceedings of EMECR2017, 204-207, 2017.10.
33. Kazuto Nishihiro, Ko-ichiro OHNO, Takayuki Maeda, Kazuya Kunitomo, Effect of surface characteristics of reduced iron on carbon deposition reaction by CO-H2 gas mixture, Proceedings of EMECR2017, 50-51, 2017.10.
34. Ahmadreza Amini, Takayuki Maeda, Ko-ichiro OHNO, Alireza Zakeri, Kazuya Kunitomo, Effect of SrO addition to the CaO-Al2O3-SiO2 slag on desulfurization of plain carbon steel, Proceedings of EMECR2017, 86-89, 2017.10.
35. Cao Son Nguyen, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Effect of Carbon Dissolution Reaction on Wetting Behaviour of Molten Fe–C Alloy on Graphite Substrate in the Initial Contact Period, ISIJ International, https://doi.org/10.2355/isijinternational.ISIJINT-2017-054, 57, 9, 1491-1498, 2017.09.
36. Shungo Natsui, Ko-ichiro OHNO, Sohei Sukenaga, Tatsuya Kikuchi, Ryosuke O. Suzuki, New Discrete Element Simulation for Trickle Flow in Blast Furnace, Proceedings of ESTAD2017, USB Memory, 2017.06.
37. Shungo Natsui, Ryota Nashimoto, Tatsuya Kikuchi, Ryosuke O. Suzuki, Hifumi Takai, Ko-ichiro OHNO, Sohei Sukenaga, Capturing the Non-spherical Shape of Granular Media and Its Trickle Flow Characteristics Using Fully-Lagrangian Method, AIChE Journal, http://doi.org/10.1002/aic.15538, 63, 6, 2257-2271, 2017.06.
38. Cao Son Nguyen, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Wetting behavior of carbon un-saturated iron on graphite substrate, Proceedings of International Symposium on Advanced Science and Technology in Experimental Mechanics, 48-1-48-2, 2016.11.
39. Cao Son Nguyen, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Role of Al2O3 in Interfacial Morphology and Reactive Wetting Behavior between Carbon-unsaturated Liquid Iron and Simulant Coke Substrate, ISIJ International, 56, 8, 1325-1332, 2016.08.
40. Cao Son Nguyen, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, WETTING BEHAVIOR OF CARBON UN-SATURATED IRON ON SIMULANT COKE SUBSTRATE, Proceedings of 5th International Conference on Process Development in Iron and Steelmaking, 5, Distributed as USB memory, 2016.06.
41. Hiroshi Ogo, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Effect of Coke Breeze Distribution on Coke Combustion Rate of the Quasi-particle, ISIJ International, 55, 12, 2550-2555, 2015.12.
42. Antti Kemppainen, Ko-ichiro Ohno, Mikko Iljana, Olli Mattila, Timo Paananen, Eetu-Pekka Heikkinen, Takayuki Maeda, Kazuya Kunitomo, Timo Fabritius, Softening Behaviors of Acid and Olivine Fluxed Iron Ore Pellets in the Cohesive Zone of a Blast Furnace, ISIJ International, 55, 10, 2039-2046, 2015.10.
43. Ko-ichiro Ohno, Takahiro Miyake, Shintaro Yano, Cao Son Nguyen, Takayuki Maeda, Kazuya Kunitomo, Effect of Carbon Dissolution Reaction on Wetting Behavior between Liquid Iron and Carbonaceous Material, ISIJ International, 55, 6, 1252-1258, 2015.06.
44. Ko-ichiro Ohno, Shohei Tsurumaru, Alexander Babich, Takayuki Maeda, Heinrich Willhelm Gudenau, Dieter Senk, Kazuya Kunitomo, Effects of Ash Amount and Molten Ash’s Behavior on Initial Fe–C Liquid Formation Temperature due to Iron Carburization Reaction, ISIJ International, 55, 6, 1245-1251, 2015.06.
45. Ko-ichiro Ohno, Takayuki Maeda, Alexander Babich, Dieter Senk, Heinrich Wilhelm Gudenau, Kazuya Kunitomo, Investigation about Charcoal Utilization for Carburization Reaction in Ironmaking Process
, The 15th International Joint Symposium on Materials Science and Engineering between Kyushu University and Chonbuk National University , 51-63, 2013.10.
46. Ko-ichiro Ohno, Shohei Tsurumaru, Alexander Babich, Takayuki Maeda, Senk Dieter, Kazuya Kunitomo, Heinrich Wilhelm Gudenau, Investigation about Charcoal Ash Behavior at Initial Reaction Stage in Iron Carburization
, International Conference on Smart Carbon Saving and Recycling for Ironmaking, 17-18, 2013.10.
47. Ko-ichiro Ohno, Keigo Noda, KOKI NISHIOKA, Takayuki Maeda, Masakata shimizu, Effect of Coke Combustion Rate Equation on Numerical Simulation of Temperature Distribution in Iron Ore Sintering Process , ISIJ International, 53, 9, 1642-1647, 2013.09.
48. Ko-ichiro Ohno, Keigo Noda, KOKI NISHIOKA, Takayuki Maeda, Masakata shimizu, Combustion Rate of Coke in Quasi-particle at Iron Ore Sintering Process , ISIJ International, 53, 9, 1588-1593, 2013.09.
49. Takayuki Maeda, Ryota Kikuchi, Ko-ichiro Ohno, Masakata shimizu, Kazuya Kunitomo, Effect of Particle Size of Iron Ore and Coke on Granulation Property of Quasi-Particle , ISIJ International, 53, 9, 1503-1509, 2013.09.
50. Ko-ichiro Ohno, Shohei Tsurumaru, Alexander Babich, Takayuki Maeda, Kazuya Kunitomo, Senk Dieter, Heinrich Wilhelm Gudenau, Fundamental Research about Effect of Ash and Mineral on Iron Carburization Behavior in Self-Reducing Pellet
, The Ninth Korea-Japan Workshop on Science and Technology in Ironmaking and Steelmaking, 66-70, 2013.07.
51. Ko-ichiro OHNO, Shohei TSURUMARU, Alexander BABICH, Takayuki MAEDA, Kazuya KUNITOMO, Dieter SENK, and Heinrich Wilhelm GUDENAU, Effect of Molten Slag Formation on Iron Carburization Behavior in Ironmaking Process, Proceedings of 1st ISIJ-VDEh-JK Symposium on Metallurgy, 29-36, 2013.04.
52. Daisuke NOGUCHI, Ko-ichiro OHNO, Takayuki MAEDA, Masakata SHIMIZU, Koki NISHIOKA, Effect of CO gas Concentration on Reduction Rate of Major Mineral Phase in Sintered Iron Ore, ISIJ International, 53, 4, 570-575, 2013.04.
53. Yasuaki Ueki, Ryo Yoshiie, Ichiro Naruse, Ko-ichiro OHNO, Takayuki MAEDA, Koki NISHIOKA, Masakata SHIMIZU, Reaction behavior during heating biomass materials and iron oxide composites, Fuel, 104, 58-61, 2013.01.
54. Sou Hosokai, Kosuke Matsui, Noriyuki Okinaka, Ko-ichiro Ohno, Masakata Shimizu, and Tomohiro Akiyama, Kinetic Study on the Reduction Reaction of Biomass Tar Infiltrated Iron Ore, Energy & Fuels, 10.1021/ef3013272, 26, 7274-7479, 2012.11.
55. Ko-ichiro OHNO, Shohei TSURUMARU, Masashi KAIMOTO, Alexander BABICH, Takayuki MAEDA, Kazuya KUNITOMO, Dieter SENK, Heinrich Wilhelm GUDENAU and Masakata SHIMIZU, Investigation About Effect of Slag From Coal Ash and Ore Material on Iron Carburization Reaction in Self-Reducing Pellet, Proceedings of Scrap Supplements and Alternative Ironmaking VI, CD-ROM
, 2012.10.
56. Ko-ichiro OHNO, Kohei MUNESUE, Koki NISHIOKA, Takayuki MAEDA and Masakata SHIMIZU, Effect of molecular weight difference between several gases on gas diffusion behaviors in air flow through packed bed, Proceedings of the 5th International Conference on Science and Technology of Ironmaking, CD-ROM
, 2012.10.
57. Ko-ichiro OHNO, Alexander BABICH, Junki MITSUE, Takayuki MAEDA, Dieter SENK, Heinrich Wilhelm GUDENAU, Masakata SHIMIZU, Effects of Charcoal Carbon Crystallinity and Ash Content on Carbon Dissolution in Molten Iron and Carburization Reaction in Iron-Charcoal Composite , ISIJ International, 52, 8, 1482-1488, 2012.08.
58. Ko-ichiro OHNO, Kohei MUNESUE, Koki NISHIOKA, Takayuki MAEDA , Masakata SHIMIZU, Diffusion behaviors of He and CH4 in air flow through packed bed, ISIJ International, 52, 8, 1389-1393, 2012.08.
59. Ko-ichiro OHNO, Alexander BABICH, Dieter SENK, Heinrich Willhelm GUDENAU and Masakata SHIMIZU, Effects of carbon crystallinity and ash in charcoal on carburization reaction, Proceedings of 4th International Conference on Process Development in Iron and Steelmaking, CD-ROM, 2012.06.
60. Ko-ichiro OHNO, High-Efficiency Technology of Iron Carburization by using Biomass char in Ironmaking Process, Proceedings of International Workshop on Utilization of Biomass for Mitigation of CO2 emission, 6-1~6-13, 2011.12.
61. Ko-ichiro OHNO, Takayuki MAEDA, Masakata SHIMIZU, Investigation on slag-metal separation behavior of carbon composite pellet using various slag melting temperature, Proceedings of the 13th International Symposium on Materials Science and Engineering between Chonbuk National University and Kyushu University, 77-87, 2011.10.
62. Ko-ichiro OHNO, Masashi Kaimoto, Takayuki MAEDA, Koki NISHIOKA, Masakata SHIMIZU, Effect of Slag Melting Behavior on Metal-Slag Separation Temperature in Powdery Iron, Slag and Carbon Mixture, ISIJ International, 51, 8, 1279-1284, 2011.08.
63. Alexander Babich, Pruet Kowitwarangkul, Dieter Senk, Heinrich Wilhelm Gudenau, Ko-ichiro Ohno, Masakata Shimizu, Yasuaki Ueki, Use of charcoal, biomass and waste plastics for reducing CO2 emission in ironmaking, 1st International Conference on Energy Efficiency and CO2 Reduction in the Steel Industry, CD-ROM, 2011.06.
64. Ko-ichiro Ohno, Takayuki Maeda, Koki Nishioka, Maeda Shimizu, Effect of slag melting behavior on slag-metal separation temperature of self reducing pellet, 6th European Coke and Ironmaking Congress 2011, CD-ROM, 2011.06.
65. Koki Nishioka, Yasuaki Ueki, Ko–ichiro Ohno, Takayuki Maeda and Masakata Shimizu, Production of Reduced Iron and Valuable Gases from Waste Plastic Materials and Iron Oxide Mixtures, The 12th Japan-China Symposium on Science and Technology on Iron and Steel, 50-56, 2010.10.
66. Koki Nishioka, Naoyuki Suura, Ko-ichiro Ohno, Takayuki Maeda, Masakata Shimizu, Development of Fe Base Phase Change Materials for High Temperature Using Solid–Solid Transformation, ISIJ International, 50, 9, 1240-1244, 2010.09.
67. Masakata Shimizu, Kouki Nishioka, Takayuki Maeda and Koichiro Ohno, View Point and Possibility for Innovation of Blast Furnace Ironmaking, 3rd International Symposium on Sustainable Ironmaking, 20, 2010.07.
68. Masakata Shimizu, Takayuki Maeda, Kouki Nishioka, Ko-ichiro Ohno and Akito Kasai, Reaction and Melting Behavior of Hot Briquetted Carbon Composite Iron Ore Pellet , The Third Australia-China-Japan Joint Symposium on Iron and Steelmaking, 2010.07.
69. Koki Nishioka, Daiki Fujiwara, Ko-ichiro Ohno, Takayuki Maeda and Masakata Shimizu, Modeling of Dripping Behavior in Particles Packed Bed Filled with Immiscible Fluid , ISIJ International, 50, 7, 1016-1022, 2010.07.
70. Ko-ichiro OHNO, Takayuki MAEDA, Koki NISHIOKA and Masakata SHIMIZU, Influence of Carbon Structure on Iron Carburization Behavior, The International Symposium on Ironmaking for Sustainable Development 2010, 2010.01.
71. Koki Nishioka, Takayuki Maeda, Ko-ichiro Ohno, Masakata Shimizu, Effect of Iron Ore and Coal Properties on Reduction and Gasification Behavior of Carbon Composite Iron Ore Briquette, The 6th Korea-Japan workshop on Science and Technology in Ironkaking and Steelmaking, 123-127, 2010.01.
72. Ko-icniro Ohno, Takayuki Maeda, Koki Nishioka, Masakata Shimizu, Effect of Carbon Structure Crystallinity on Initial Stage of Iron Carburization, ISIJ International, 50, 1, 53-58, 2010.01.
73. Ko-ichiro OHNO, Takayuki MAEDA, Koki NISHIOKA and Masakata SHIMIZU, Effect of Carbon Structure on Iron Melting Behavior due to Carburaization, The Third International Symposium on Novel Carbon Resources Sciences, 280-286, 2009.11.
74. Ko-ichiro OHMO, Takayuki MAEDA, Koki NISHIOKA and Masakata SHIMIZU, Effect of Carbon Structure on Iron Carburaization and Primary Fe-C Liquid Formation, 5th International Conference on Science and Technology of Ironmaking, 2, 1161-1165, 2009.10.
75. Koki NISHIOKA, Koji OSUGA, Yasuaki UEKI, Ko-ichiro OHNO, Takayuki MAEDA and Masakata SHIMIZU , Effect of Iron Ore and Coal Properties on Reduction and Gasification Behavior of Carbon Composite Iron Ore Briquette, 5th International Conference on Science and Technology of Ironmaking, 2, 1326-1330, 2009.10.
76. Ko-ichiro OHNO, Yasuaki UEKI, Takayuki MAEDA, Koki NISHIOKA , Masakata SHIMIZU, Effective Use of Waste Plastic Materials in Iron Oxide Reduction Process, Proceedings of Asia Steel 2009 International Conference, S2-09, 2009.05.
77. Yasuaki UEKI, Ryutaro MII, Ko-ichiro OHNO, Takayuki MAEDA, and Masakata SHIMIZU, Reaction behavior during heating waste plastic materials and iron oxide composites, ISIJ International , vol. 48, No. 12 pp.1670 - 1676, 2008.12.
78. Ko-ichiro Ohno, Takahiro Miki, Yasushi Sasaki and Mitsutaka Hino, Carburization Degree of Iron Nugget Produced by Rapid Heating Powder Iron, Iron Oxide in Slag and Carbon Mixture, ISIJ International, vol. 48, No. 10, pp.1368-1372, 2008.10.
79. Ko-ichiro OHNO, Yasuaki UEKI, Takayuki MAEDA, Koki NISHIOKA , Masakata SHIMIZU, Utilization of Waste Plastic Material as Reducing Agent and Gaseous Source during Iron Reduction Process, Proceedings of 7th Japan-Brazil Symposium on Dust Processing-Energy-Environment in Metallurgical Industries, pp.54-64, 2008.09.
80. K. Nishioka, Y. Ueki, K. Ohno, T. Maeda and M. Shimizu, Gasification and Reduction Behavior of Plastics and Iron Ore Mixtures by Microwave Heating, Proceedings of the 9th International Symposium on Materials Science and Engineering between Chonbuk National University and Kyushu University, 2007.10.
81. Ko-ichiro OHNO, Naoyuki TAKEUCHI, Yohei NOMURA, Takayuki MAEDA, Koki NISHIOKA and Masakata SHIMIZU, Rapid reduction of spherical wustite fine particle transported with CH4 gas, Proceedings of 3rd International Steel Conference on New Developments in Metallurgical Process Technologies, 2007.06.
82. Masakata SHIMIZU, Yasuaki UEKI, Takayuki MAEDA, Koki NISHIOKA and Ko-ichiro OHNO, Characteristics and Possibilities of Self-Reduction Method with Carbon Composite Iron Ore Compacts, Proceedings of International Conference on Mining, Materials and Petroleum Engineering, 2007.05.
83. M. Shimizu, Y. Nomura, K. Ohno, T. Maeda and K. Nishioka, Rapid In-Flight Reduction of Fine Iron Ore Transported by CH4 Gas, Proceedings of Japan-Indonesia Bilateral Symposium on Sustainable Engineering, 2007.05.
84. Ko-ichiro Ohno and Mitsutaka Hino, Carburization Mechanism during Rapid Heating Process of Fine Iron Ore and Pulverized Coal Mixtures, ADVANCES IN METALLURGICAL PROCESSES AND MATERIAL 2007, CD-R, 2007.05.
85. Koki NISHIOKA, Takeshi TANIGUCHI, Yasuaki UEKI, Ko-ichiro OHNO, Takayuki MAEDA and Masakata SHIMIZU, Gasification and Reduction Behavior of Plastics and Iron Ore Mixtures by Microwave Heating, ISIJ International , Vol. 47 (2007) No. 4, pp. 602-607, 2007.04.
86. Koushuke Saito, Ko-ichiro Ohno, Takahiro Miki, Yasushi Sasaki and Mitsutaka Hino, Behavior of Ironmaking Slag Permeation through Carbonaceous Material Layer, ISIJ International, vol.46, No.12, pp. 1783-1790, 2006.12.
87. Naoyuki TAKEUCHI, Yohei NOMURA, Ko-ichiro OHNO, Takayuki MAEDA, Koki NISHIOKA , Masakata SHIMIZU, Kinetic Analysis of Spherical Wustite Reduction Transported with CH4 Gas, ISIJ international, Vol. 47, No. 3, pp.386-391, 2007.03.
88. Ko-icniro Ohno, Takahiro Miki, Yasushi Sasaki, Mitsutaka Hino, IRON CARBURIZATION IN POWDERY IRON ORE AND PULVERIZED COAL MIXTURE DURING SMELTING REDUCTION, The 4th International Congress on the Science and Technology of Ironmaking, pp. 413-416, 2006.11.
89. Naoyuki TAKEUCHI, Yohei NOMURA, Ko-ichiro OHNO, Takayuki MAEDA, Koki NISHIOKA , Masakata SHIMIZU, Reduction Rate of Spherical Wustite Transported with CH4 Gas, Proceedings of 6th Japan-Brazil Symposium on Dust Processing-Energy-Environment in Metallurgical Industries, pp.5-9, 2006.11.
90. Ko-ichiro Ohno, Naoyuki Takeuchi, Yohei Nomura,Takayuki Maeda, Koki Nishioka, Masakata Shimizu, Reduction Mechanism of Spherical Wustite Transported with CH4 Gas, The 8th International Symposium on Materials Science and Engineering between Kyushu University and Chonbuk National University, pp. 10-16, 2006.10.
91. Ko-ichiro Ohno, Takahiro Miki and Mitsutaka Hino, Kinetic analysis of iron carburization during smelting reduction, ISIJ International, vol.44 no.12 pp.2033-2039, 2004.12.
92. Ko-ichiro Ohno, Tetsuya Nagasaka and Mitsutaka Hino, “In situ” Observation of Smelting Reduction and Carburization of Iron Ore with Carbonaceous Materials by Laser Scanning Microscope, Steel Research, vol.74, No.1, pp.5-8, 2003.01.
93. Kousuke SAITO, Ko-ichiro OHNO, Takahiro MIKI, Yasushi SASAKI and Mitsutaka HINO, Behavior of Ironmaking Slag Permeation through Carbonaceous Material Layer, Proceedings of 12th ISIJ-VDEh SEMINAR, 47-54, 2005.11.
Presentations
1. Ginichiro Sato, Tatsuya Kon, Ko-ichiro Ohno, Effect of gangue mineral in the fine particles on compressive strength of iron ore granules, The 1st International Symposium on Iron Ore Agglomerates (SynOre2022), 2022.11.
2. Sohei Sukenaga, Sakiko Kawanishi, Masahito Uchikoshi, Shingo Ishihara, Shungo Natsui, Ko-ichiro Ohno, Noritaka Saito, Kunihiko Nakashima, Masanori Tashiro, Hiroyuki Shibata, Effects of Atmosphere and Melting Time on Surface Tension of Iron Silicate Melts, MOLTEN2021, 2021.02.
3. , Wang Ziming, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Effect of magnetite on mineral phase formation, ESTAD2019, 2019.06.
4. Kazuto Nishihiro, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Reaction behavior between CO-CO2 gas mixture andcarbon fiber deposited during metal dusting process, ESTAD2019, 2019.06.
5. Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Sohei Sukenaga, Shungo Natsui, Evaluation Technique of Gas Permeability in Granulated Slag Particle Bed using Softening and Melting Simulator with Micro CT Scanning, ESTAD2019, 2019.06.
6. Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Visualization for Molten Slag Clogging Behavior during Softening and Melting of Slag Particles Packed Bed with Micro CT Observation, 148th Annual Meeting and Exhibition TMS2019, 2019.03.
7. A. Amini, Ko-Ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Interaction between Microwaves and Fe3O4 Particles at Temperatures Lower than the
Curie point, 第13回日本電磁波エネルギー応用学会シンポジウム, 2018.11.
8. Kazuto Nishihiro, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, KINETIC ANALYSIS OF CARBON FIBER DEPOSITION ON CATALYST IRON IN CO-H2 MIXTURE GAS, 8th International Congress on the Science and Technology of Ironmaking (ICSTI2018), 2018.09.
9. Ahmadreza AMINI, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, MAGNETITE REDUCTION by H2 DURING MICROWAVE HEATING, 8th International Congress on the Science and Technology of Ironmaking (ICSTI2018), 2018.09.
10. Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Yusuke Morita, Kohei Sunahara, Tsunehisa Nishimura, Kenichi Higuchi, Apparent Softening Viscosity Measurement of Granulated Slag Packed Bed With Softening And Melting Simulator, 8th International Congress on the Science and Technology of Ironmaking (ICSTI2018), 2018.09.
11. Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Apparent softening viscosity measurement of slag packed bed under loading condition, 10th Japan-Brazil Symposium on Dust Processing - Energy - Environment in Metallurgical Industries, 2018.09.
12. Z. Wang, H. Ogi, K. Ohno, T. Maeda, K. Kunitomo, Effect of magnetite on initial melt formation in sintering process, 日本鉄鋼協会 第176回秋季講演大会, 2018.09.
13. Ko-ichiro Ohno, Research activity of softening and melting simulator with rapid heating and quenching operation, The Twelfth Korea-Japan Workshop on Science and Technology in Ironmaking and Steelmaking, 2017.11.
14. Ko-ichiro Ohno, Research activity on Ironmaking technology of Kyushu University, KU-EU Workshop on Iron- and Steelmaking, 2017.10.
15. Ko-ichiro Ohno, Cao Son Nguyen, Takayuki Maeda, Kazuya Kunitomo, Role of Carbon Dissolution Reaction in the Initial Contact Period of Carbon-unsaturated Fe-C Sample Wetting on Graphite Substrate, 1st International Conference on Energy and Material Efficiency and CO2 Reduction in the Steel Industry (EMECR2017), 2017.10.
16. Ahmadreza Amini, Takayuki Maeda, Ko-ichiro Ohno, Alireza Zakeri, Kazuya Kunitomo, Effect of SrO addition to the CaO-Al2O3-SiO2 slag on desulfurization of plain carbon steel, 1st International Conference on Energy and Material Efficiency and CO2 Reduction in the Steel Industry (EMECR2017), 2017.10.
17. Kazuto Nishihiro, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, Effect of surface characteristics of reduced iron on carbon deposition reaction by CO-H2 gas mixture, 1st International Conference on Energy and Material Efficiency and CO2 Reduction in the Steel Industry (EMECR2017), 2017.10.
18. Shungo Natsui, Ko-ichiro Ohno, Sohei Sukenaga, Tatsuya Kikuchi, Ryosuke O. Suzuki, New Discrete Element Simulation for Trickle Flow in Blast Furnace, EUROPEAN STEEL TECHNOLOGY AND APPLICATION DAYS 2017 - ESTAD 2017, 2017.06.
19. Ahmadreza Amini, 麦田湧規, 西廣隼一, 大野光一郎, 国友和也 , Simultaneous desulfurization and carbothermic reduction of FeS in the presence of
lime using microwave heating, 資源・素材学会九州支部 平成 29 年度総会・春季例会・若手研究者および技術者の研究発表会, 2017.06.
20. Cao Son Nguyen, 大野 光一郎, 前田 敬之, Kazuya Kunitomo, Wetting behavior of carbon un-saturated iron on graphite substrate
, 11th International Symposium on Advanced Science and Technology in Experimental Mechanics, 2016.11.
21. 大野 光一郎, Cao Son Nguyen, 前田 敬之, Kazuya Kunitomo, Effect of Simulant Ash on Reactive Wetting Behavior between Carbon-unsaturated Liquid Iron and Carbonaceous Material Substrate, 2nd International Conference on Smart Carbon Saving and Recycling for Ironmaking, 2016.10.
22. 大野 光一郎, Challenging analysis for complex system using cohesive zone simulator with rapid heating and rapid cooling, Advanced reduction metallurgy and coke research, 2016.06.
23. Cao Son Nguyen, 大野 光一郎, 前田 敬之, Kazuya Kunitomo, A Wettability Measurement Method for Reactive Wetting Behavior of Liquid Iron on Carbonaceous Material Substrate, Advanced reduction metallurgy and coke research, 2016.06.
24. Cao Son Nguyen, 大野 光一郎, 前田 敬之, Kazuya Kunitomo, Wetting behavior of carbon un-saturated iron on simulant coke substrate, SCANMET V 5th International Conference on Process Development in Iron and Steelmaking, 2016.06.
25. Ko-ichiro Ohno, Hiroshi Ogi, Keigo Noda, Koki Nishioka, Kazuya Kunitomo, Takayuki Maeda, Masakata Shimizu, Temperature Distribution Simulation Of Iron Ore Sintering Process Based On Consideration About Fine Coke Combustion Behavior In Quasi-particle, 2015 Sustainable Industrial Processing Summit, 2015.09.
26. Ko-ichiro Ohno, Current Challenges of Japanese Ironmaking Technology, 2015 Sustainable Industrial Processing Summit, 2015.09.
27. M. Iljana, E.P. Heikkinen, T. Fabritius, A. Kemppainen, Ko-ichiro Ohno, Takayuki Maeda, Kazuya Kunitomo, O. Mattila, T. Paananen, Softening behavior of iron ore pellets in the cohesive zone of a blast furnace, METEC and European Steel Technology and Application Days 2015, 2015.06, M. Iljana, E.P. Heikkinen, T. Fabritius,
O. Mattila, T. Paananen.
28. Ko-ichiro Ohno, Shohei Tsurumaru, Alexander Babich, Takayuki Maeda, Dieter Senk, Heinrich Wilhelm Gudenau, Kazuya Kunitomo, Effect of Carbonaceous Material's Ash on Iron Carburization at Initial Reaction Stage, METEC and European Steel Technology and Application Days 2015, 2015.06.
29. Hiroshi Ogi, Takayuki Maeda, Ko-ichiro Ohno, Kazuya Kunitomo, Effect of Coke Breeze Distribution on Coke Combustion Rate of the Quasi-Particle, AISTech - Iron and Steel Technology Conference, 2015.05.
30. Ko-ichiro Ohno, Takahiro Miyake, Shintaro Yano, Cao Son Nguyen, Takayuki Maeda, Kazuya Kunitomo, Effect of simulant ash on wetting behavior of liquid iron on carbonaceous material substrate, AISTech - Iron and Steel Technology Conference, 2015.05.
31. Ko-ichiro Ohno, Takayuki Maeda, Alexander Babich, Dieter Senk, Heinrich Wilhelm Gudenau, Kazuya Kunitomo, Investigation about Charcoal Utilization for Carburization Reaction in Ironmaking Process, The 15th International Joint Symposium on Materials Science and Engineering between Kyushu University and Chonbuk National University, 2013.10.
32. Ko-ichiro Ohno, Shohei Tsurumaru, Alexander Babich, Takayuki Maeda, Senk Dieter, Kazuya Kunitomo, Heinrich Wilhelm Gudenau, Investigation about Charcoal Ash Behavior at Initial Reaction Stage in Iron Carburization, International Conference on Smart Carbon Saving and Recycling for Ironmaking, 2013.10.
33. Ko-ichiro Ohno, Shohei Tsurumaru, Alexander Babich, Takayuki Maeda, Kazuya Kunitomo, Senk Dieter, Heinrich Wilhelm Gudenau, Fundamental Research about Effect of Ash and Mineral on Iron Carburization Behavior in Self-Reducing Pellet, The Ninth Korea-Japan Workshop on Science and Technology in Ironmaking and Steelmaking, 2013.07.
34. Ko-ichiro Ohno, Shohei Tsurumaru, Kazuya Kunitomo, Alexander Babich, Senk Dieter, Heinrich Wilhelm Gudenau, Effect of Molten Slag Formation on Iron Carburization Behavior in Ironmaking Process, The ISIJ-VDEh-Jernkontoret Joint Symposium, 2013.04.
35. Effect of slag melting behavior on metal-slag separation temperature.
36. Kinetics of reduction step of wustite to iron of hematite and quaternary calcium ferrite mixtures.
37. Effect of CO gas concentration on reduction rate of multicomponent calcium ferrite.
38. Combustion rate of coke in quasi-particles in the sintering process.
39. Effect of Carbon Structure on Iron Carburization and Primary Fe-C Liquid Formation Behavior, The 5th International Congress on the Science and Technology of Iron-making, 2009, Shanghai, China.
40. Mathematical Model of Sintering Process for Gaseous Fuel Injection.
41. Properties measurements and Mathematical model Development of Innovative Carbon Iron Ore Composites.
42. Effect of CO Gas Concentration on Reduction Rate of Iron Oxide.
43. Effect of Carbon Property on Gasification Rate of Carbon Obtained by Decomposition of Organic Waste.
44. Effective diffusivity of gas in packed beds.
45. In-situ Observation of Iron Melting Behavior due to Carburization using Laser Microscope, International Working Group on in-situ high temperature observation of metallurgical phenomena, 2009, Glasgow, UK.
46. Effective Use of Waste Plastic Materials in Iron Oxide Reduction Process, Asia Steel 2009 International Conference, 2009, Busan, Korea.
47. Rapid reduction of spherical wustite fine particle transported with CH4 gas, 3rd International Steel Conference on New Developments in Metallurgical Process Technologies, 2007, Düsseldorf, Germany.
48. Utilization of Waste Plastic Material as Reducing Agent and Gaseous Source During Iron Reduction Process, 7th Japan-Brazil Symposium on Dust Processing - Energy - Environment in Metallurgical Industries, 2008, Sao Paulo, Brazil.
49. Microscopic Observation of Iron Carburization by Coal under the Presence of Liquid Slag, Yazawa International Symposium , The minerals, Metals and Materials Society, 2003, San Diego, USA.
50. Kinetic Analysis of Iron Carburization during Smelting Reduction Gas, Report of Science and Technology of Innovate Ironmaking for aiming Energy Half Consumption, Ministry of Education, Culture, Sports, Science and Technology, 2003, Tokyo, Japan.
51. Reduction Mechanism of Spherical Wustite Transported with CH4 Gas, The 8th International Symposium on Materials Science and Engineering between Kyushu University and Chonbuk National University, 2006, Fukuoka, Japan.
52. Reduction Rate of Spherical Wustite Transported with CH4 Gas, The 6th Japan-Brazil Symposium on Dust Processing-Energy-Environment in Metallurgical Industries, 2006, Sapporo, Japan.
53. IRON CARBURIZATION IN POWDERY IRON ORE AND PULVERIZED COAL MIXTURE DURING SMELTING REDUCTION, The 4th International Congress on the Science and Technology of Ironmaking, 2006, Osaka, Japan.
Membership in Academic Society
  • The Japan Society for Experimental Mechanics
  • Japan Society of Electromagnetic Wave Energy Applications
  • Association for Iron & Steel Technology
  • The Mining and Materials Processing Institute of Japan
  • The Iron and Steel Institute of Japan
Awards
  • ISIJ Young Researcher Award
Educational
Educational Activities
・Transportation Phenomenon (for B2, Language: Japanese)
・Reaction Engineering (for B3, Language: Japanese)
・Introduction of Iron-steel making process (for B3, Language: Japanese)
・Reaction Control in Metallurgical Processing (for M1, Language: Japanese)
・Reaction Control in Metallurgical Processing (for Global course, Language: English)
・Material Process Engineering Exercise 1st A(for M1, Language: Japanese)
・Material science information aggregation exercise (for M1, Language: Japanese)
・Material science information aggregation exercise A (for M1, Language: Japanese)
・Industry-academia collaboration internship 1 (for M1, Language: Japanese)
・QFC-SP(Internship for high school students)

Student experiment, guidance of graduation thesis writing
Other Educational Activities
  • 2022.12.
  • 2021.06.