Fundamental investigation of mixing properties evaluation for Intensive mixer using DEM simulation

Natsuki Kawabe, Yuki Tsunazawa, Chiharu Tokoro

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Mixing is an important process in various powder handling and operations. Objective of this study was DEM (discrete element method) simulation to grasp mixing properties, especially for mixing rate and final mixing degree, in intensive mixer which is drum typed stirring mill with eccentric agitator and baffle plate. To validate the simulation results, mixing experiments using hematite particles were also conducted. Both in simulation and experiment, various sample size was adopted for mixing evaluation because mixing degree depends on sample size. As a result in experiment, mixing rate and final mixing degree became lower and higher respectively as larger sample size was adopted. Similar trend was achieved in simulation. Furthermore, effect of agitator rotation speed, particle size and mill angle for mixing properties was investigated in DEM simulation. Simulation results suggested that mixing was achieved by early rapid convective mixing, followed by slow diffusive mixing. High rotation speed of agitator made early convective mixing more rapidly whereas it made following diffusive mixing more slowly. When the particle size became larger, convective mixing became dominant. Simulation results also demonstrated that 30° of machine angle brought most rapid mixing rate and total mixing rate became higher in binary components system.

    Original languageEnglish
    Title of host publicationEARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology
    PublisherInternational Symposium on East Asian Resources Recycling Technology
    Pages827-836
    Number of pages10
    Publication statusPublished - 2015
    Event13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015 - Pattaya, Thailand
    Duration: 2015 Nov 12015 Nov 4

    Other

    Other13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015
    CountryThailand
    CityPattaya
    Period15/11/115/11/4

    Fingerprint

    discrete element method
    simulation
    evaluation
    mill
    particle size
    experiment

    Keywords

    • DEM
    • Mixing ratio
    • Powder mixing

    ASJC Scopus subject areas

    • Environmental Science(all)

    Cite this

    Kawabe, N., Tsunazawa, Y., & Tokoro, C. (2015). Fundamental investigation of mixing properties evaluation for Intensive mixer using DEM simulation. In EARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology (pp. 827-836). International Symposium on East Asian Resources Recycling Technology.

    Fundamental investigation of mixing properties evaluation for Intensive mixer using DEM simulation. / Kawabe, Natsuki; Tsunazawa, Yuki; Tokoro, Chiharu.

    EARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology. International Symposium on East Asian Resources Recycling Technology, 2015. p. 827-836.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Kawabe, N, Tsunazawa, Y & Tokoro, C 2015, Fundamental investigation of mixing properties evaluation for Intensive mixer using DEM simulation. in EARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology. International Symposium on East Asian Resources Recycling Technology, pp. 827-836, 13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015, Pattaya, Thailand, 15/11/1.
    Kawabe N, Tsunazawa Y, Tokoro C. Fundamental investigation of mixing properties evaluation for Intensive mixer using DEM simulation. In EARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology. International Symposium on East Asian Resources Recycling Technology. 2015. p. 827-836
    Kawabe, Natsuki ; Tsunazawa, Yuki ; Tokoro, Chiharu. / Fundamental investigation of mixing properties evaluation for Intensive mixer using DEM simulation. EARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology. International Symposium on East Asian Resources Recycling Technology, 2015. pp. 827-836
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