Updated on 2025/01/06

写真a

 
Fumihito Mishima
 

Education

  • Osaka University   Doctor's Course   Completed

    - 2008.3

Research History

  • Fukui University of Technology   Associate Professor

    2016.4 - 2018.3

  • Fukui University of Technology   Professor

    2018.4

 

Papers

  • Investigation on high gradient magnetic separation for CRUD material in nuclear reactor, Reviewed

    S.Nishijima, N.Nomura, F.Mishima and T.Sekine,

    Progress in Superconductivity and Cryogenics   26 ( 3 )   5 - 8   2024.9

  • Research and development of new magnetic filter for high gradient magnetic separation Invited Reviewed International journal

    Shigehiro Nishijima* , Naoki Nomura, and Fumihito Mishima

    Progress in Superconductivity and Cryogenics   25 ( 3 )   1 - 6   2023.9

    　More details

    We have been developing a new magnetic filter so that small sized paramagnetic substances can be separated even in a low magnetic field (lower than 2T). The developed filter is a packed ferromagnetic filament with a triangular cross section. The filament has a diameter of 120 μm and a length of 3 mm, and is mechanically packed with a volume ratio of 17.6%. Using this filter, a magnetic separation experiment of hematite was carried out using a superconducting magnet at the field of 2T. Similarly, magnetic
    separation was performed using a conventional magnetic filter. It became clear that the separation efficiency of newly developed filter is high as that of conventional mesh filter. The smaller sized hematite (<3μm) could be separated though conventional mesh filter could not separate.

  • Study on multi-stage magnetic separation device for paramagnetic materials operated in low magnetic fields Reviewed

    Fumihito Mishima,Naoki Nomura, Shigehiro Nishijima

    Progress in Superconductivity and Cryogenics   25 ( 3 )   13 - 17   2023.9

    　More details

    Magnetic separation technology for small paramagnetic particles has been desired for the volume reduction of contaminated soil from the Fukushima nuclear power plant accident and for the separation of scale and crud from nuclear power plants. However, the magnetic separation for paramagnetic particles requires a superconducting high gradient magnetic separation system applied, hence expanding the bore diameter of the magnets is necessary for mass processing and the initial and running costs would be enormous. The use of high magnetic fields makes safe onsite operation difficult, and there is an industrial need to increase the magnetic separation efficiency for paramagnetic particles in as low a magnetic field as possible. Therefore, we have been developing a magnetic separation system combined with a selection tube, which can separate small paramagnetic particles in a low magnetic field. In the previous technique we developed, a certain range of particle size was classified, and the classified particles were captured by magnetic separation. In this new approach, the fluid control method has been improved in order to the selectively classify particles of various diameters by using a multi-stage selection tube. The soil classification using a multi-stage selection tube was studied by calculation and experiment, and good results were obtained. In this paper, we report the effectiveness of the multi-stage selection tube was examined.

  • Separation of micro-plastics from sea water using electromagnetic archimedes force Reviewed

    Naoki Nomura, Fumihito Mishima, Shigehiro Nishijima

    Progress in Superconductivity and Cryogenics   25 ( 3 )   18 - 21   2023.9

    　More details

    Pollution of the environment by micro-plastics is now a worldwide problem. Plastics are difficult to decompose and put a great
    load on the marine environment. Especially a plastic with a size of 5 mm or less is defined as micro-plastic and are carried by ocean currents over long distances, causing global pollution. These are not easily decomposed in the natural environment. In this paper,
    we aimed to experimentally demonstrate that micro-plastics in seawater can be continuously separated by electromagnetic Archimedes force. Using polyethylene particles of 3 mm in diameter as the separation target, a flow channel was fabricated and
    separation conditions were investigated by particle trajectory calculations for separation experiments. Based on the calculation
    results, a solenoid-type superconducting magnet was used as a source of magnetic field to conduct separation experiments of micro-plastics in seawater. Although a high separation rate was assumed in the simulation results, the experimental results did not show any significant improvement in the separation rate due to the electromagnetic Archimedes force. It was found that the gas generated by the electrolytic reaction may have inhibited the migration of the particles.

  • Magnetic separation device for paramagnetic materials operated in a low magnetic field Reviewed

    Progress in Superconductivity and Cryogenics   24 ( 3 )   19 - 23   2022.10

    　More details

    We have been developing a magnetic separation device that can be used in low magnetic
    fields for paramagnetic materials. Magnetic separation of paramagnetic particles with a small
    particle size is desired for volume reduction of contaminated soil in Fukushima or separation
    of iron scale from water supply system in power plants. However, the implementation of the
    system has been difficult due to the needed magnetic fields is high for paramagnetic
    materials. This is because there was a problem in installing such a magnet in the site.
    Therefore, we have developed a magnetic separation system that combines a selection tube
    and magnetic separation that can separate small sized paramagnetic particles in a low
    magnetic field. The selection tube is a technique for classifying the suspended particles by
    utilizing the phenomenon that the suspended particles come to rest when the gravity acting
    on the particles and the drag force are balanced when the suspension is flowed upward. In
    the balanced condition, they can be captured with even small magnetic forces. In this study,
    we calculated the particle size of paramagnetic particles trapped in a selection tube in a high
    gradient magnetic field. As a result, the combination of the selection tube and HGMS (High
    Gradient Magnetic Separation-system) can separate small sized paramagnetic particles
    under low magnetic field with high efficiency, and this paper shows its potential application.

  • Study of microp-plastics separation from sea water with electro-magnetic force Reviewed

    N.Nomura, F.Mishima, S.Nishijima

    IEEE Transactions on Applied Superconductivity   32 ( 6 )   3700405   2022.9

    　More details

    The method of removing micro-plastics from sea water has been developed using electro-
    magnetic force. Plastics are difficult to decompose and put a great load on the marine
    environment. Especially a plastic with a size of 5mm or less is defined as micro-plastics and
    are carried by ocean currents over long distances, causing global pollution. These are not
    easily decomposed in the natural environment. The Lorentz force was generated in
    simulated sea water and its reaction force was applied to the micro-plastic to control their
    motion. The basic principle of this separation method has already been confirmed by basic
    experiments. In this study, the magnetic field and current density required to treat seawater
    containing micro-plastics using a superconducting magnet with a bore diameter of 5cm were
    investigated by simulation. Plastic particles with a diameter of more than 200 μm were
    targeted for separation, and various conditions for separation were investigated by
    simulation. As a result, it was shown that good separation efficiency was obtained under the
    following conditions: flow velocity of 0.2m/s, electrode size of 150mm, current density of
    0.93A/cm2,and applied magnetic field of 3T.

  • Development of novel magnetic separation for paramagnetic particles using the selection tube Reviewed

    : IEEE Transactions on Applied Superconductivity   32 ( 6 )   3700204   2022.9

    　More details

    Generally, in order to control and separation of paramagnetic substances by magnetic
    force, a superconducting high gradient magnetic separation system applied magnetic field of
    about 5T over is required. In this study, we aim to apply a low magnetic field for magnetic
    separation of paramagnetic substances. We propose the novel separation method, which is
    applying a magnetic field to the selection tube, aiming for more precise and easier
    separation than the conventional High Gradient Magnetic Separation System (HGMS).
    Selection tube can separate particle mixture into each kinds of particles by the balance of
    drag force, buoyancy and gravity depending on flow velocity, particle size, shape and
    specific weight. Since the particles are apparent weightless stage, they can be captured with
    a relatively small magnetic force. Firstly, we showed the effectiveness of open-gradient
    magnetic separation (OGMS: applied magnetic flux density 1.3T) under the selection tube
    with using colored glass imitated target substance. The experimental results were found to
    show good separation efficiency. Eventually, we tested the HGMS obtained by improving the
    novel magnetic separation method, where a low magnetic field applied (maximum magnetic
    flux density 0.5T) is applied to magnetic filter (wire diameter 0.8mm, 1.5 mesh, SUS 430)
    installed in the selection tube. The effective separation of paramagnetic glass (volume
    magnetic susceptibility: +3.17x10-4) was performed successfully with the combination of the
    selection tube and HGMS applied low magnetic field.

  • study of micro-plastics separation from sea water with electro-magnetic force Reviewed

    Naoki NOMURA ,Fumihito MISHIMA, Shigehiro Nishijima

    progress in superconductivity and cryogenics   23 ( 3 )   10 - 13   2021.9

  • Removal of Iron Oxide Scale From Feed-Water in Thermal Power Plant by High-Gradient Magnetic Separation: field experiment Reviewed

    Y.Akiyama,S. Li, T. Mori, H.Okada, N.Hirota, H.Matsuura, T.Yamaji, S.Namba, T.Sekine, F.Mishia,S.Nishijima

    progress in superconductivity and cryogenics   23 ( 3 )   14 - 19   2021.8

  • Removal of Iron Oxide Scale From Boiler Feed-Water in Thermal Power Plant by Magnetic Separation-Separation Conditions of Oxygenated Treatment Scale Reviewed

    K. Akiyama, Y.Akiyama, T. Mori, T.Terai, H.Okada, N.Hirota, H.Matsuura, T.Yamaji, S.Namba, T.Sekine, F.Mishia,S.Nishijima

    : IEEE Transactions on Applied Superconductivity   31 ( 5 )   3700204   2021.8

  • Removal of Iron Oxide Scale From Feed-Water in Thermal Power Plant by High-Gradient Magnetic Separation: Scale-Up Effect Reviewed

    Tatsuya Mori, Junya Yamamoto, Yoko Akiyama, Hidehiko Okada, Noriyuki Hirota, Hideki Matsuura, Seitoku Namba, Tomokazu Sekine, Fumihito Mishima, Shigehiro Nishijima

    IEEE Transactions on Magnetics   56 ( 12 )   1 - 8   2020.12

  • Advanced magnetic separation of paramagnetic materials using fluid control Reviewed

    Memoirs of Fukui University of Technology   ( 50 )   103 - 109   2020.10

  • Development of magnetic separation system for thermal power plants Reviewed

    Hidehiko Okada, Noriyuki Hirota, Yoko Akiyama, Fumihito Mishima, Shigehiro Nishijima, Hideki Matsuura, Seitoku Namba, Tomokazu Sekine

    IEEJ Transactions on electrical and electronics engineering   15 ( 11 )   1655 - 1662   2020.9

  • Development of magnetic separation system with superconducting magnet for thermal power plants

    H.Okada,N.Hirota,Y.Akiyama,F.Mishia,S.Nishijima,H.Matsuura,T.Yamaji,S.Namba, T.Sekine

    Journal of Cryogenics and Superconductivity Society of Japan   55 ( 3 )   179 - 184   2020.5

  • Possibility of applying superconducting high-gradient magnetic separation to volume reduction of cesium-contaminated soil Invited Reviewed

    Yoko Akiyama, Naoki Nomura, Fumihito Mishima,Shigehiro Nishijima,

    Journal of Cryogenics and Superconductivity Society of Japan   55 ( 3 )   172 - 178   2020.5

  • Research and development of concentration and recovery method for phosphor containing rare earth elements using magnetic force control technology Invited Reviewed

    Shigehiro Nishijima, Yoko Akiyama, Fumihito Mishima

    Journal of Cryogenics and Superconductivity Society of Japan   55 ( 3 )   189 - 194   2020.5

  • Removal of Scale from Feed-water in Thermal Power Plant by Magnetic Separation -Analysis of Oxygenated Treatment Scale- Reviewed

    M.Hiramatsu, J.Yamamoto, Y.Akiyama, F.Mishima, S.Nishijima, H.Okada, N.Hirota, T.Yamaji, H.Matsuura, S.Namba

    Journal of Physics: Conference Series   2019.10

  • Removal of Iron Scale from Boiler Feed-water in Thermal Power Plant by Magnetic Separation - Large-scale Experiment - Reviewed

    ・ J.Yamamoto, T.Mori, Y.Akiyama, H.Okada, N.Hirota, H.Matsuura, S.Namba, T.Sekine, F.Mishima, S.Nishijima,

    IEEE Transactions on Applied Superconductivity   2019

  • Study on Separation of Structural Isomer with Magneto-Archimedes method Reviewed

    T Kobayashi, T Mori, Y Akiyama, F Mishima, S Nishijima

    Journal of Physics：Conference Series   871 ( 012018 )   1 - 7   2017.9

  • Separation of Flame and Nonflame-retardant Plastics Utilizing Magneto-Archimedes Method Reviewed

    K.Misawa, T.Kobayashi, T.Mori, F.Mishima, Y.Akiyama and S.Nishijima

    Journal of Physics：Conference Series   871 ( 012103 )   1 - 8   2017.7

  • Volume reduction of cesium contaminated soil by magnetic separation-Pretreatment of organic matters－ Reviewed

    H. Horie, K.Yukumatsu, F.Mishima,Y.Akiyama, S.Nishijima, T.Sekiyama, S.Mitsui and M.Kato

    Journal of Physics：Conference Series   871 ( 012102 )   1 - 7   2017.7

  • Fundamentral Study of Magnetic Separation Method for Radioactive Contaminant Reviewed

    三島　史人　　奥田　貴大

    MEMOIRS OF FUKUI UNIVERSITY OF TECHNOLOGY   ( 47 )   111 - 116   2017.5

  • The Separation of Structural Isomers using a Magneto-Archimedes Method Reviewed

    Journal of Cryogenics and Superconductivity Society of Japan   52 ( 2 )   105 - 109   2017.2

  • Study on Volume Reduction of Cesium Contaminated Soil by Magnetic Separation Reviewed

    K. Yukumatsu, N. Nomura, F. Mishima, Y. Akiyama, S. Nishijima

    IEEE Transactions on Applied Superconductivity   26 ( 4 )   Page(s)3700604   2016.6

  • Study on Magnetic Separation Device for Scale Removal From Feed-Water in Thermal Power Plant Reviewed

    S. Shibatani, M. Nakanishi, N. Mizuno, F. Mishima, Y. Akiyama, H. Okada, N. Hirota, H. Matsuura, T. Maeda, N. Shigemoto, S. Nishijima

    IEEE Transactions on Applied Superconductivity   26 ( 4 )   Page(s)3700304   2016.6

  • Development of a magnetic separation system of boiler feed water scale in thermal power plants Reviewed

    ・ H. Okada, K. Imamura, N. Hirota, T. Ando, S. Shibatani, N. Mizuno, M. Nakanishi, F. Mishima, Y. Akiyama, S. Nishijima, H. Matsuura, T. Maeda, N. Shigemoto,

    IEEE Transactions on Applied Superconductivity   26 ( 3 )   Page(s)3701505   2016.4

  • Study of the separation method of structural isomer using Magneto-Archimedes method Reviewed

    T. Mori, T. Kobayashi, F. Mishima, Y. Akiyama, S. Nishijima

    Progress in Superconductivity and Cryogenics   18 ( 1 )   14 - 18   2016.3

  • Development of Superconducting High Gradient Magnetic Separation System for Scale Removal from Feed-water in Thermal Power Plant Reviewed

    ・ S. Shibatani, M. Nakanishia, N. Mizuno, F. Mishima, Y. Akiyama, H. Okada, N. Hirota, H. Matsuura, T. Maeda, N. Shigemoto, S. Nishijima

    Progress in Superconductivity and Cryogenics   18 ( 1 )   19 - 22   2016.3

  • Development of volume reduction method of cesium contaminated soil with magnetic separation Reviewed

    K. Yukumatsu, N. Nomura, F. Mishima, Y. Akiyama, S. Nishijima

    Progress in Superconductivity and Cryogenics   18 ( 1 )   10 - 13   2016.3

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Presentations

  • Study on a superconducting magnetic selection tube separator for paramagnetic materials

    F. Mishima, N.Nomura, S.Nishijima

    The 15th international forum on magnetic force control in Beijing + online  2024.9 

    　More details

    In conventional methods, magnetic separation of paramagnetic materials requires a combination of a strong magnetic field of about 5 T or more and a high gradient magnetic field with ferromagnetic filaments. Therefore, we have proposed a separation concept of the selection tube magnetic separation method in which the drag force acting on the particles to be separated is reduced as much as possible to an almost weightless state by fluid control, and a low magnetic field is used as the source of the magnetic field for the magnetic attraction force required for the separation. The width of the particle size distribution can be precisely controlled by magnetic force. In this study, a superconducting magnetic selection tube separator experiment was conducted. A magnetic filter was placed in a selection tube and an external magnetic field of 2 T was applied. As a result, it was confirmed that particles were captured on the magnetic filter, confirming that vermiculite with a particle size appropriate for the calculated flow velocity was captured. Magnetic separation of paramagnetic particles of several microns in diameter was demonstrating that the magnetic separation method using selection tubes is effective for the separation of paramagnetic materials.

  • High gradient magnetic separation in selection tube for paramagnetic materials

    Fumihito Mishima,　Naoki Nomura, 　Shigehiro Nishijima

    2022.11 

  • Study on multi-stage magnetic separation device for paramagnetic materials operated in low magnetic fields

    F. Mishima, A.Nagahama, N.Nomura, S.Nishijima

    2022.11 

  • Development of novel magnetic separation for paramagnetic particles using the selection tube International conference

    Fumihito Mishima,Naoki Nomura, Shigehiro Nishijima

    27th International Conference on Magnet Technology  2021.11  IEEE

  • Fundamental study on superconducting magnetic separation of paramagnetic materials using a selection tube International conference

    Fumihito Mishima, Naoki Nomura、Shigehiro Nishijima

    2024.12  International Superconductivity Symposium(ISS-Board)

    　More details

    In this study, a superconducting solenoid magnet was applied as the magnetic field generator, sieved vermiculite particles were measured with a particle size analyzer, and the flow velocity in the tube was determined from calculations with the targeted particle diameter of the particles to be separated as 4 µm, and a selection tube superconducting magnetic separation experiment was conducted. A magnetic filter (made of SUS430 with a wire diameter of 0.6 mm) was placed in a selection tube and an external magnetic field of 2 T was applied. A two-stage selection tube was used, and the target particles were suspended in the separation area. The particles were captured on the magnetic filter, with a peak at about 4 µm particle size, confirming that vermiculite with a particle size appropriate for the calculated flow velocity was captured. High gradient magnetic separation experiments were conducted using a small-scale selection tube with a superconducting magnet of the solenoid type under a low magnetic field. Magnetic separation of paramagnetic particles of several microns in diameter was possible at a maximum applied magnetic field of 2 T, demonstrating that the magnetic separation method using selection tubes is effective for the separation of paramagnetic materials.

  • Applicability of magnetic separation to CRUD processing in BWR decommissioning Invited International conference

    S. Nishijima, F. Mishima, N.Nomura, T. Sekine

    The 15th international forum on magnetic force control in Beijing  2024.9 

  • Investigation on High Gradient Magnetic Separation for CRUD Material in Nuclear Reactor Invited International conference

    S. Nishijima, F. Mishima, N. Nomura and T. Sekine

    The 14th international forum on magnetic force control Web 開催  2023.11 

  • Study of a selection tube magnetic separation method using a paramagnetic fluid

    F. Mishima, N. Nomura, S. Nishijima

    The 14th international forum on magnetic force control Web 開催  2023.11 

  • Separation of micro-plastics from sea water using electromagnetic Archimedes force International conference

    N. Nomura, F. Mishima , S. Nishijima

    The 14th international forum on magnetic force control Web 開催  2023.11 

  • Separation of Micro-plastics from Sea Water Using Lorenz Force-Fabrication of devices and separation experiments-

    Naoki Nomura, Fumihito Mishima, and Shigehiro Nishijima

    2022.11 

  • Research and Development of New Magnetic Filter for High Gradient Magnetic Separation Invited

    Shigehiro Nishijima, Naoki Nomura, Fumihito Mishima

    2022.11 

  • Removal of Iron Oxide Scale from Boiler Feed-water in Thermal Power Plant by Magnetic Separation　-Aggregation States of Oxygenated Treatment Scale- International conference

    Masao Okumura, Yoko Akiyama, Tatsuya Mori, Hidehiko Okada, Noriyuki Hirota, Tsuyoshi Yamaji, Hideki Matsuura, Seitoku Namba, Tomokazu Sekine, Fumihito Mishima, Shigehiro Nishijima

    27th International Conference on Magnet Technology  2021.11  IEEE

  • Separation of Microplastics from Sea Water by Means of Electromagnetic Force International conference

    Shigehiro Nishijima, Fumihito Mishima, Naoki Nomura

    27th International Conference on Magnet Technology  2021.11  IEEE

  • Separation of Micro-plastics from Sea Water Using Lorenz Force International conference

    Naoki Nomura, Fumihito Mishima, and Shigehiro Nishijima

    The 12th International Forum on Magnetic Force Control  2021.10 

  • Magnetic separation device for paramagnetic materials operated in a low magnetic fields International conference

    Fumihito Mishima,Naoki Nomura, Shigehiro Nishijima

    The 12th International Forum on Magnetic Force Control  2021.10 

  • Development of Novel Magnetic Filter for Paramagnetic Particles in High Gradient Magnetic Separation International conference

    Shigehiro Nishijima, Fumihito Mishima and Naoki Nomura

    The 12th International Forum on Magnetic Force Control  2021.10 

  • Study of Micro-plastic separation from sea water with electro-magneic force International conference

    Shigehiro Nishijima, N.Nomura, F.Mishima

    第11回磁気力制御国際フォーラム  一般社団法人　電気学会

  • Fundamental study on magnetic separation in paramagnetic-ferromagnetic coexistin system -Magnetic separation on Iron oxide scale in boiler feedwater system- International conference

    T.Sakano, F.Mishima, N.Nomura, S.Nishijima

    The 11th International Forum on Magnetic Force Control  一般社団法人　電気学会

  • Study on the fluid control for magnetic separation of paramagetenic particles International conference

    F.Mishima, N.Nomura, S.Nishijima

    The 11th International Forum on Magnetic Force Control  一般社団法人　電気学会

  • Study of Separation of Cesium Compounds Using Argon Plasma Ⅱ

  • Investigation on High Gradient Magnetic Separation for Crud Material in Nuclear Reactors Invited International conference

    S. Nishijima, N. Nomura, F. Mishima

    The 11th East Asia Symposium on Superconductor Electronics (EASSE 2023)  2023.3 

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