巻号一覧
66 巻, 745 号
選択された号の論文の9件中1～9を表示しています
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落合 静1950 年 66 巻 745 号 p. 255-261
発行日: 1950/06/25
公開日: 2011/07/13
ジャーナル フリーAt Namazuda Colliery, Mitsubishi Mining Co. Ltd, we have succeeded in mechanizing the longwall working by using steel props, cutting and loading machines for the very thin and, poor coal seams, and obtained saliently the increase in output per maashift and the reduction in cost.抄録全体を表示PDF形式でダウンロード (2588K) -
近藤 清已1950 年 66 巻 745 号 p. 262-266
発行日: 1950/06/25
公開日: 2011/07/13
ジャーナル フリーTwo boreholes, drilled parallel with each other at the closed. interval and then.charged with one or two, pieces of 112.5gr. dynamite, is blasted to penetrate and spring mutually at their bottom and sprung boreholes are utilized as the explosive chamber with proper volume instead of the four reliever and two center cut holes in the previous Pyramid Out method.
This Method reduces not only the drilling cost about 15% by the reductioii of wear of the drilling Machine, drill bit but also quantity of explosives about 10% by the increase of blasting efficiency by Means of the concentratted charging.
With this method, a cause for the Springing Blasting method, did not. successfui in drifting is removed and it is applied, to every rocks, at the Yanahara. Pyrite mine.抄録全体を表示PDF形式でダウンロード (1722K) -
実驗装置及び測定方法須藤 欽吾1950 年 66 巻 745 号 p. 267-270
発行日: 1950/06/25
公開日: 2011/07/13
ジャーナル フリーThe reduction equilibrium of metallic sulphides by hydrogen gas have been investigated to provide a sound basis for the thermodynamic treatment of reactions about smelting, of sulphide ores. In, order to: avoid4any. errors occasioned by thermal diffusion the flow method has been employed.
The experimental apparatus and, method of measurement employed and also the calculating method of the dissociation pressures of the sulphides from the results. observed have been described in this report.抄録全体を表示PDF形式でダウンロード (1325K) -
固態硫化第一鉄の水素に依る還元平衡に就いて須藤 欽吾1950 年 66 巻 745 号 p. 270-273
発行日: 1950/06/25
公開日: 2011/07/13
ジャーナル フリーThe equilibrium in the reduction of solid ferrous sulphide by hydrogen gas has been studied with the aid of, .a dynamical method as previously reported. The effect of temperature upon the equilibrium constant and the free energy change in the reaction within the, range 775-872°C has been determined. The experimental data are summarized by the equations as follows: FeS (β) +H2=Fe (β) +H2S; logKp=- 3098/T+0.141ΔF°=14170-0.645T
By combining the equations here -determihed with the known' ones of hydrogen sulphide, the following equations have been obtained with regard to the dissociation pressure of solid ferrous sulphide.
2FeS (β) =2Fe (β) +S2; logPS2=-15582/T+5.382ΔF°=71272-24.917T
And also by combining the values here obtained with theexisting ones, the following therm. odynanile values in relation, to the forniaion of solid ferrous sulphide have been. calculated. Fe (α) +S (γ) = FeS (α);ΔH298.1=-22608 cal ΔF°298.1=-23110 cal抄録全体を表示PDF形式でダウンロード (1209K) -
河山鉱山に於ける實例三宅 輝海1950 年 66 巻 745 号 p. 274-277
発行日: 1950/06/25
公開日: 2011/07/13
ジャーナル フリーPDF形式でダウンロード (1224K) -
1950 年 66 巻 745 号 p. 277
発行日: 1950年
公開日: 2011/07/13
ジャーナル フリーPDF形式でダウンロード (326K) -
伊藤 健勇1950 年 66 巻 745 号 p. 278-289
発行日: 1950/06/25
公開日: 2011/07/13
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田原 莠1950 年 66 巻 745 号 p. 290-291
発行日: 1950/06/25
公開日: 2011/07/13
ジャーナル フリーPDF形式でダウンロード (673K) -
1950 年 66 巻 745 号 p. 292-294
発行日: 1950/06/25
公開日: 2011/07/13
ジャーナル フリーPDF形式でダウンロード (1129K)
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