Journal of the Society of Powder Technology, Japan
Online ISSN : 1883-7239
Print ISSN : 0386-6157
ISSN-L : 0386-6157
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Volume 15, Issue 8
Displaying 1-6 of 6 articles from this issue
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  • Residence Time Distribution of Particles in the Continuous Spouted Bed of Solid-Gas System with Elutriation of Fines
    Toshifumi ISHIKURA, Isamu TANAKA, Hisashi SHINOHARA
    1978 Volume 15 Issue 8 Pages 453-457
    Published: August 10, 1978
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.15.453
    JOURNAL FREE ACCESS
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    There are a few study on the residence time distribution in the continuous spouted bed of solid-gas system without elutriation of particles. However, there is apparently no study on the case with elutriation of fines.
    In this paper, the residence time distribution of particles in the continuous spouted bed with or without elutriation of fines was measured and the experimental values were compared with the theoretical values which were developed from the simle mixing model.
    As the results, the experimental values without elutriation of fines coincided fairly well with the reported and the theoretical values and furthermore the experimental values with elutriation of fines showed good agreement with the theoretical values.
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  • Estimation of Packing Porosity of Multi-component Particle Systems
    Eiichi ABE, Hideharu HIROSUE, Akira YOKOTA
    1978 Volume 15 Issue 8 Pages 458-462
    Published: August 10, 1978
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.15.458
    JOURNAL FREE ACCESS
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    This paper deals with a method to estimate the porosity of multi-component particle systems packed tightly.
    The method is developed with linking two theories derived by Tokumitsu and Kawamura et al independently, that is, the porosity of multi-component particle systems under the condition of various size ratio and shape can be estimated by using the porosity of each component as basic data.
    Packing experiments of three component particle systems were carried out. Samples used in the experiments were glass beads of 1190 to 1000μm, 500 to 420μm and 125 to 105μm in diameter respectively. The following results were obtained.
    The experimental values of the porosity approximately agreed with the theoretical values, and especially the close agreement between observed and calculated values was obtained on the point of mixing ratio to give beds of minimum porosity. Therefore, it is considered that this method is useful to estimate the porosity and the mixing ratio to give beds of minimum porosity in the case of three component particle systems.
    Furthermore, this method will be applied for estimating the porosity of multi-component particle systems more than three component systems.
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  • Effect of Solid Particle Character on Toughnees of Abrasive Grains
    Akikazu NAKAMURA, Kenichi KOYAMA, Sumiko OTA
    1978 Volume 15 Issue 8 Pages 463-466
    Published: August 10, 1978
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.15.463
    JOURNAL FREE ACCESS
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    Toughness, Bulkdensity, Particle Shape, and Silicon Carbide Content were measured for Silicon Carbide Abrasive Grain (Particle Grade: #16, #30, #60 and #150).
    The relationship of their measured characters were statisticaly studied.
    The following results were obtained.
    1) There were high correlation between Toughness and Bulkdensity, so that Toughness could be estimated from Bulkdensity.
    2) Bulkdensity had additional property on same particle grade.
    3) There were high correlation between Bulkdensity and Particle Shape.
    4) Effect of Siliconcarbide Content (95-99%) could not be found.
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  • [title in Japanese]
    Hisasuke Takeuchi
    1978 Volume 15 Issue 8 Pages 467-481
    Published: August 10, 1978
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.15.467
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Kazumi Danjo
    1978 Volume 15 Issue 8 Pages 491-496
    Published: August 10, 1978
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.15.491
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1978 Volume 15 Issue 8 Pages 497-498
    Published: August 10, 1978
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.15.497
    JOURNAL FREE ACCESS
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