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 17, Issue 10
Displaying 1-5 of 5 articles from this issue
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  • Manufacturing Method of Standard Test Dust (1)
    Ken-ichi YAMASHITA
    1980 Volume 17 Issue 10 Pages 547-554
    Published: October 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.547
    JOURNAL FREE ACCESS
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    This report is on study of manufacturing method of JIS Z 8901 test dusts for industrial testing.
    No. 1 dusts prepared for perfomance, function and wear tests of machines and apparatus such as dust collecter and various kinds of meters, are prepared by crushing So-ma silica sand with specified composition in a ball mill.
    The optimum manufactiring condition is determind from viepoint of easiness and shortening of process time.
    The sample No. 1 are prepared by grinding 1000g So-ma silica sand in a ball mill for 2 hours and then passed through 297μm sieve 1000g of the residuals on the sieve are again ground in a ball mill for 3 hours.
    The relation of the supply mass condition versus the dispersion exponent and yield are shown.
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  • Collection Efficiency in Venturi Scrubbers using Electro-Charged Water
    Isao AOKI, Takuzo MATSUYAMA
    1980 Volume 17 Issue 10 Pages 554-558
    Published: October 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.554
    JOURNAL FREE ACCESS
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    Venturi scrubbers are widely used for the collection of dust particles. They have many advantages, such as being of a relatively low capital cost and the space required for their installation being small etc. But a significant disdvantage of the scrubber is the considerable pressure drop across the venturi In order to overcome this defect, an electrostatic scrubber and a thermal venturi scrubber were recently developed.
    We carried out tests utilizing electro-charged water instead ordinary water for the scrubber. Electro-charged water is generated by the application of a high voltage directly to water. Our experiments show that the collection efficiency is rather good, 90-98% using 8-16kV charged water, and the velocity of gas at the throat is as so slow as 40m/sec. This system has a remarkable saving in power consumption as compare with a conventional veturi scrubber. In addition, this system is applicable to liquid-gas ratios as small as 0.02l/Nm3.
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  • [title in Japanese]
    Michitaka Suzuki, Kazutaka Makino, Koichi Iinoya, Kinnosuke Watanabe
    1980 Volume 17 Issue 10 Pages 559-564
    Published: October 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.559
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Susumu Tohno, Kanji Takahashi
    1980 Volume 17 Issue 10 Pages 565-578
    Published: October 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.565
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Takamichi Yahiro
    1980 Volume 17 Issue 10 Pages 584-596
    Published: October 10, 1980
    Released on J-STAGE: April 30, 2010
    DOIhttps://doi.org/10.4164/sptj.17.584
    JOURNAL FREE ACCESS
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