日本鉱業会誌

集中爆破に関する力学的解析

小島康司

1963 年 79 巻 903 号 p. 640-644
発行日: 1963/09/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.79.903_640

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To studay the behavior of the rock that is blasted by the detonation of explosives, the formulas that show stresses produced in elastic body are gained, whenthe inner face of the loading cavity is pushed by the force P₀l^-Kt (t show time, P₀and K is constant) the radical displacement is shown in formula 5 and the radical and circular streses ase shown in formula 6 and 7. Using these formulas and IBM 7070, the magnitudes and shapes of stress wave are calculated. Those are shown in flg 2 and 3.
The analysis of these show that the main stress of destruction of rock blasting seems the tentional stress produced in circular direction.

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相似形サイクロンによる諸性能の研究

藤本敏治, 茂呂端生

1963 年 79 巻 903 号 p. 645-651
発行日: 1963/09/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.79.903_645

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In view of the fact that a hydrocyclone is essentially a classifier, collection and thickening charactaristic tests were carried out using an experimental unit under various dimensions and operating conditions.
This paper gives the results of the performance tests, including some suggestions with respect to the collection efficiency, thickening ratio, i. e. the underflow density divided by the feed density and clarifying ratio, i. e. the overflow density divided by the feed density.
In addition to the above results, the authors have shown some suggestions with respect to the separation effect, i. e. the ash content and the recovery of the underflow products.

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銅陽極電位に及ぼす不純物の影響 (第4報)

銀, 金および白金の影響

梅津良之, 鈴木信一郎

1963 年 79 巻 903 号 p. 653-658
発行日: 1963/09/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.79.903_653

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Effect of silver, gold and platinum on the anode potential of copper has been studied. As these metals are soluble in solid copper the equilibrium electrode potential of copper becomes more noble. The crystal lattice of copper however, is expanded by dissolving these metals and the reduction of the activation polarization of copper anode is expected. At low electrolytic temperature and high current density, the descent of anode potential was observed. On the other hand, formation of anode slime on the anode surface makes anode potential ascend.

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煙灰よりレニウムの抽出

伊藤尚, 東敬

1963 年 79 巻 903 号 p. 659-663
発行日: 1963/09/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.79.903_659

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The extraction of Rhenium from some flue dusts containing 0.07-0.42% Re was studied. The processes tested were as follows:
a) Direct leaching with water
b) Leaching with aqueous solution containing oxidizing agents such as nitric acid, bromine or calcium hypochlorite.
c) Sintering with Ca (OH) ₂followed by leaching with water
d) Leaching with alkali solution such as NaOH or Ca (OH) ₂
The best result was obtained when the samples were subgected to leaching with aqueous solution containing nitric acid or bromine. More than 95 per cent. of rhenium present was extracted.

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AN-FO爆薬

田中正男

1963 年 79 巻 903 号 p. 665-671
発行日: 1963/09/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.79.903_665

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大峰・田老における選鉱現地研究会 (その1)

選鉱専門委員会

1963 年 79 巻 903 号 p. 672-683
発行日: 1963/09/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.79.903_672

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摘録

1963 年 79 巻 903 号 p. 685-694
発行日: 1963/09/25
公開日: 2011/07/13

DOIhttps://doi.org/10.2473/shigentosozai1953.79.903_685

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