Journal of the Mining Institute of Japan
Online ISSN : 2185-6729
Print ISSN : 0369-4194
ISSN-L : 0369-4194
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Volume 67, Issue 759
Displaying 1-6 of 6 articles from this issue
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  • A General Survey of the Bustiness Activities and Techniques of the Nippon Mining Company
    Yoji ATSUMO
    1951 Volume 67 Issue 759 Pages 443-449
    Published: September 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.443
    JOURNAL FREE ACCESS
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    With the termination of war, our companj, without exception to the-rule, was also deprived of its huge overseas assets. In addition to this it confronted many adversities in the nature of economic chaos. Nevertheless with pains-taking labor and continous efforts it was possible to sustain the company's existence and jconduct its rehabilitation. The results of these efforts have eventually borne fruit, for now, the company has been able to expand its business and has attained a position to carry on further development.
    A brief explanation of the company's present business operationsas given, belowwith, the hope that the reader will accord us with his guidance in the future.
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
    1951 Volume 67 Issue 759 Pages 451-458
    Published: September 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.451
    JOURNAL FREE ACCESS
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  • On the Gravel-Packing Method used in Completing Wells
    Kinji MIKAWAUCHI
    1951 Volume 67 Issue 759 Pages 459-464
    Published: September 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.459
    JOURNAL FREE ACCESS
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    The packing of gravel about.the liner of a well is essentially a process designed to decrease the amount of sand migrating into the well bore and at same time to increase the production rate due to increasing the permeability and porosity of the material adjacent to the well.
    The migration of sand through a gravel screen is very complex phenomenon and depend upon a numder of variables. The more important of these are the size, replacement and thickness of the gravel, the size and size distribution of the sand and the hydraw-dynamic flow conditions.
    The author made an experimental study of a few subjects as follows.
    1. The influence of packing condition of gravel upon the screening effects.
    2. The influence of closed sizing of gravel upon the screening effects.
    3. The selection of gravel sige from the stand point of permeability decreasing by sand infiltration.
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  • On the Mechanisms of Reactions in Chloridizing Roasting of Zinc Sulphide
    Takuzo SHIMIZU
    1951 Volume 67 Issue 759 Pages 465-472
    Published: September 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.465
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    In chloridizing roasting of zinc sulphide, the reaction occurs among salt, sulphur and oxygen, generating chlorine gas, which then reacts upon zinc sulphide, and there grows Zinc chloride. There are three forms of sulphur vapour, namely S8, S6, S2. At high temperature almost all part if the vapour is in S2 form, but at low temperature the larger part of it is in S6, S6 forms and the smaller part. is in S2 form. In ordinary pressure, even at 500°-600°C, the considerably large part of the vapour is in S2 form, so We may consider the vapour as in S2 form. As the chlorine gas reacts upon the -sulphur vapour, We can not recognize the free chlorine in the roasted gas. In the chloridizing roasting of zinc sulphide, the mechanisms of reactions are as follows;
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  • [title in Japanese]
    [in Japanese]
    1951 Volume 67 Issue 759 Pages 473-476
    Published: September 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.473
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1951 Volume 67 Issue 759 Pages 477-481
    Published: September 25, 1951
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.67.477
    JOURNAL FREE ACCESS
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