巻号一覧
57 巻, 673 号
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池田 謙三1941 年 57 巻 673 号 p. 253-255
発行日: 1941/05/22
公開日: 2011/07/13
ジャーナル フリーPDF形式でダウンロード (625K) -
松原 厚1941 年 57 巻 673 号 p. 256-259
発行日: 1941/05/22
公開日: 2011/07/13
ジャーナル フリーThe recent progress of the method is that it afforded the means by which one is able not only to locate the hidden are body of the equi-reverse potential map, but also to estimate its approximate depth or shape of its upper portion, provided that the terrestrial conditions are favourable.
This paper gives a brief review of the principle of the method and some results of field experiment.抄録全体を表示PDF形式でダウンロード (1470K) -
岡田 丈五郎1941 年 57 巻 673 号 p. 260-268
発行日: 1941/05/22
公開日: 2011/07/13
ジャーナル フリー(1) To begin with, I studied contact angles at the mineral surfaces through water drop method. At my preliminary test I cleaned the mineral surfaces with cloth dipped in ether. This cloth I had previously boiled in pure water for one hour and I made use of pyrite, chalcopyrite, galena, zinc blend and quartz in test. But the yalue of the contact angles at the surfaces of these minerals proved to be very inconstant. I had great many difficulties to obtain constant value at the surface of the same mineral. In order to obtain cleaned and well-polished surfaces, experiments were repeated on quartz. I used Benzene, Benzine, alkali for the purpose of taking off fatty materials over the mineral surfaces. Thus by laborious efforts moderately constant value (10°-20°) was obtained.
(2) The effect of sodium oleate on contact angle at the surface of quartz was tested through air bubble method in the solution. But in this case there was no effect worth mentioning. This may perhaps be attributed to the fact that the surface tension of water is lowered by the reagent. The value of contact angle which was obtained through air bubble method in pure water was markedly smaller than that through the dropping of pure water.
(3) Effects of Amyle Xanthate on the contact angle at the surface of pyrite, galena and chalcopyrite were tested. My experiments were done upon both polished surface and cleavage. And I found there was a great effect. By using this reagent (only 0.0005%) remarkable effects were obtained. And also I found that its effect on the new surface was greater than on the old one. So I believe that the effectiveness of most collectors will be measured by their effects on the contact angles at the surface of minerals.抄録全体を表示PDF形式でダウンロード (3928K) -
伊藤 尚1941 年 57 巻 673 号 p. 269-276
発行日: 1941/05/22
公開日: 2011/07/13
ジャーナル フリーThe passivity of the impure tin anodes were studied. Each one of Pb, Cu, Bi, or Sb is added to the anode in amount of about 0.5, 5.0, and 10% as impurity. The electrolytes used are H2SO4, H2SiFG, and their mixtures. The effect of impurity on the passivation of tin anode differs so greatly with its kind with the change of composition of electrolyte that it is impossible to express in one word.
As a rule, the passifying tendency increases with the amount of impurity, except the case of Bi, which shows no effect in H2SO4 and max. passifying tendency by its content of 5% in the other kinds of electrolytes.
As a particular case in Pb, its presence in amount of 5% is exceptionally harmful in the electrolyte of SO4=0.5 n, SiF6=1.5 n, Sn++0.5 n. Passifying tendency decreases generally with the increasing proportion of SiF6.抄録全体を表示PDF形式でダウンロード (1900K) -
1941 年 57 巻 673 号 p. 277-288
発行日: 1941/05/22
公開日: 2011/07/13
ジャーナル フリーPDF形式でダウンロード (3208K)
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