Journal of the Mining Institute of Japan
Online ISSN : 2185-6729
Print ISSN : 0369-4194
ISSN-L : 0369-4194
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Volume 68, Issue 765
Displaying 1-6 of 6 articles from this issue
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  • Technical Consideration about Inundation on the Ube Undersea Coal Field (3)
    Sakae IWAZAWA
    1952 Volume 68 Issue 765 Pages 99-108
    Published: March 25, 1952
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.68.99
    JOURNAL FREE ACCESS
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  • Fundamental Researches on Smelting of Sulphide Ores.(9th Report)
    On the Equilibrium in the Reduction of Sulphur in Molten Tin by Hydrogen
    Kingo SUDO
    1952 Volume 68 Issue 765 Pages 109-113
    Published: March 25, 1952
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.68.109
    JOURNAL FREE ACCESS
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    In order to determine the thermodynamic properties of sulphur dissolved in molten tin, the reduction equilibrium of sulphur in liquid tin by hydrogen gas was investigated for the temperature range 727-873°C.
    It was found that the molten tin containig sulphur is regarded as an ideal solution within the limit of experiment. Experimental results are summarized as follows:
    S (in liq. Sn) +H2=H2S; K=PH2S/PH2·[%S] =KP/[%S], log K=-2, 397/T+0.495, ΔF°C=10, 964-2.264T
    Combining the equations with the published ones relating to the equilibrium constant of time formation reaction of hydrogen sulphide, time approximate equations expressed as a function of temperature for the dissociation pressure of sulphur dissolving in molten tin over the temperature range 727-873°C may be represented by the following equations:
    2 S (in liq. Sn) =S2; K'=Ps2/[%S] 2, log K'=-14, 180/T+6.090, ΔF°=64, 860-27.86T
    Furthermore combining the results observed with the equilibrium constants of dissociation of hydrogen sulphide calculated from the exact formula as a function of temperature, the values of log K' at experimental temperatures were calculated and compared with those from the above equation and then it was found that both values at each temperature agree with each other.
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  • Viscosimeter for the Slags of Copper and Lead Blast Furnace
    Sakichi GOTO, Hiroshi KAMETANI
    1952 Volume 68 Issue 765 Pages 115-120
    Published: March 25, 1952
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.68.115
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    A new type of viscosimeter was designed and constructed which is suitable for measuring the viscosity of molten copper and lead blast furnace slags. Its principle, consists in rotating a small cylinder dipped in a molten slag contained in an iron crucible. The cylinder is hung and driven by a phosphorbronze (or piano) wire at a constant speed and viscosity is determined by measuring the angle through which the wire is twisted. For this purpose a needle is attached to the upper end of the cylinder and the angle is read by a dial fixed to the shaft of the synchronous moter driving the wire, so that viscosity measurment can be carried out in the course of revolution. The viscosity value for the Kosaka slag was found to be about 50 poise at 1160°C. Addition of Si02; Al203 and BaO increase the viscosity value and that of CaO and FeO decrease it.
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  • [title in Japanese]
    [in Japanese]
    1952 Volume 68 Issue 765 Pages 121-124
    Published: March 25, 1952
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.68.121
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1952 Volume 68 Issue 765 Pages 125-130
    Published: March 25, 1952
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.68.125
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  • [title in Japanese]
    1952 Volume 68 Issue 765 Pages 131-138
    Published: March 25, 1952
    Released on J-STAGE: July 13, 2011
    DOIhttps://doi.org/10.11508/shigentosozai1885.68.131
    JOURNAL FREE ACCESS
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