巻号一覧
68 巻, 770 号
選択された号の論文の14件中1～14を表示しています
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矢嶋 澄策1952 年 68 巻 770 号 p. 341-346
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーIn this paper, the writer first makes a historical research of mercury mining in Japan.
Japan had stbstantial mercury production as early as 7th century, but since then the production showed downward trend and become none in and after 16th century, chiefly due to the lack of geological knowledge and mining engineering. Sine the beginning of this century, a number of new mercury mines were discovered, which brought forth a few tons of mercury only. But the discovery of the Itomuka mine in 1936 changed the whole feature. During the Pacific War, the mercury production in Japan showed peak production of 245 metric tons in 1944, 80 percent of which from the Itomuka mine. But the end of war cut the production sharply again, the Itomuka mine operating only.
However, according to the writer's study, it is possible to vaise the production again.
The writer states his geological and mineralogical study on the structures and origins of Japan-ese mercury mines, suggests advisable principles for prospection and illustrates profitable methods of mining, dressing and smelting for smaller mines from his 15 years study and experience at Itomuka mine. Then the writer con ludes that Japanese mercury mines, maney but comparably small and low-graded, will be able to meet domestic requirement not in the long future, if they are operated after study of special treatment.抄録全体を表示PDF形式でダウンロード (1148K) -
矢野 隆二1952 年 68 巻 770 号 p. 347-352
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリー“Stoco” and “Cargot” are the same principle as “Cardox”. In the Bibai Coal Mine “Stoco” was tested for the first time July 1949 and “Cargot” August 1950. In these tests, we found many imperfect points, and then we have made the effects to improve these points. Now, these tools are used practically in this Coal Mine.
This report contains the progress improving the mechanism of these tools and results of the coal getting by these tools.抄録全体を表示PDF形式でダウンロード (3542K) -
山県 四郎1952 年 68 巻 770 号 p. 353-363
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーThe recovery of zinc from smelter slags by fuming process is not an entirely an innovation for, it has long since been put into operation at the lead smelters in the United States, Canada, Australia, and other countries, but the example of the success of the copper smelter slag being treated on an industrial scale has not yet been reported to date.
At Naoshima smelter of the Taihei Mining Co., Ltd., of Japan, a complete success has been achieved in recovering zinc profitably by fuming process, treating slags from a copper smelter reverberatory furnace.
The grade of zinc contained in slags is about 7% and the monthly quantity of slags produced is approximately 6, 000 tons from which about 450 tons of zinc oxide of 62% Zn is recovered per month. The quantity of coal required somewhat varies with the grade of slag but it is about 160kg per ton of slag treated. The air ratio is 55% with the air pressure of 0.6kg/cm2.
The points of special emphasis laid on the device of this equipment are: (1) the quantity of pulverized coal to be blown into the furnace from each tuyere and the air ratio can be regulated uniformly despite of the change of back pressure of the furnace and (2) the operation is being supervised thoroughly by a controller who is stationed at the meter panel board.
At present, the foregoing zinc oxide is being refined directly as electrolytic zinc after having been leached by sulfuric acid, but a new plan is now being worked out to roast the zinc oxide by a rotary kiln to eliminate chlorine, antimony, lead, etc, to raise the zinc content of the zinc oxide up to 72% Zn from which electrolytic zinc will be produced as well as minute quantity of germanium content will be recovered from the fume in the near future.抄録全体を表示PDF形式でダウンロード (1852K) -
粟津 二郎1952 年 68 巻 770 号 p. 364-370
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーAuthor reported previously about stress distribution around a circular tunnel depend on temperature influences between strata and mine air current as two-dimensional problems of elasticity.
Those solutions are applicable to cases of deep mines where air current showes not so much temperature difference between, summer and winter, or to the yearly mean temperature of air current.
Continuously to the preceediag paper, author has solved about heat stresses around a circular tunnel due to
(i) Yearly temperature-changes of mine air current
(ii) Cooling or heating actions of mine air current, in this paper.
The former is impossible to take no heed for shallow mines and the latter for tunnels immediately after the ventilation has just started.
In general, stress distribution around tunnels consists of those three cases and stresses are also some of them.
Consequently, the problems of heat stresses around tunnels may be discussed at length theoretically, yet some important questions like written in the conclusion of this paper will be still remained in future.抄録全体を表示PDF形式でダウンロード (1032K) -
1952 年 68 巻 770 号 p. 370
発行日: 1952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 (104K) -
小口 宗三郎, 浅沼 強, 三上 芳一, 倉林 俊雄1952 年 68 巻 770 号 p. 371-374
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーAs far as the authers concern, it seems that there has been no suitable indicator which can record easily both the cylinder pressure and piston stroke in every type of rock drill under the state of practical drilling. We desiged, therefore, a new type indicator available in these cases.
In our indicator the pressur-changes in the front and rear chambers of the drill are taken out as an electric current changes by means of two sets, each of which consists of a capacity type transducer and a amplifier. On the other hand, the motion of the piston hammer is led out backward by a rod fixed to it and is also taken out as a current change by a rheostat. Then these three changes of currents are recorded simultaneously by an electro-magnetic oscillograph set up at some distance from the machine.
This indicator is so sensitive and stable that we can use it in practical drilling at a working place, and we can adapt not only to any kind of rock drill, but to another air machines. Again the calibrations of pressure and stroke can be carried out very easily on the spot.抄録全体を表示PDF形式でダウンロード (8600K) -
三雲 英之助, 会田 俊夫, 鴛海 真樹1952 年 68 巻 770 号 p. 375-378
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーBy the simple bending test of many sorts of wire ropes, we found that so-called modulus of elasticity for bending rigidity-Ef-showed constant value due to their constructions, independent to their size, and we knew that flexibility of wire rope could be represented by the “Flexibility Number”-ratio of the rigidity of cylindrical steel bar having a dameter equal to that of wire rope to the rigidity of wire rope. So we propose to use the “Flexibility Number” as the measure of flexibility of wire ropes, presenting the standard values ot “Flexibility Number” for the wire ropes of some typical constructions.抄録全体を表示PDF形式でダウンロード (630K) -
炭塵の着火温度について松本 敬信1952 年 68 巻 770 号 p. 379-382
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーConsidering from the results of which I reported formerly, of the previous experiments, it was found that the coal dusts dispersing or depositing in the coal mine was that which adsorbed. the mine gases.
Therefore, it can be guessed that in the study on the gas and coal dust explosion, the coat dusts-the object of the experiments-must be the one that adsorbed the mine gases.
From this point of view, I measured the ignition temperature, in both cases of adsording gases and air, of the coal dusts of Tagawa Seam of the Omine-Coal-Mine.
The results are as follows
(1) The ignition temperature of the coal dust falls 23°C by the adsorbing the mine gases compared to that of the one adsorbed air.
(2) The difference of the ignition temperature of these two cases is in proporsion to the volume of the mine gases adsorbed. In the other words, the more the mine gases are adsorbed, the lower the ignition temperature of the coal dust falls.
The fact that the ignition temperature of the coal dust adsorbing the mine gases is lower than that of the one adsorbing air, as well as the fact of adsorption heat, gives a. new problem to the study on tne explosion of the coal mine.
As a matter of fact, the state of the coal dusts in the coal mine is more severe than the results obtained from the experiments so far carried out on the coal dusts adsorbed air.抄録全体を表示PDF形式でダウンロード (619K) -
佐藤 与助, 黒岩 忠春1952 年 68 巻 770 号 p. 383-388
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーSamples of coal were of eight seams in Hokkaido and Joban coal fields, and they were crushed by the stamp mill. The observations were made on the size distribution, the ash content. the microscopic features of fractures, and the relation between the specific grinding resistance and input energy for every size of the coal.
Through the observatings of these items, it was recognized that coal must be generally crushed on the process of three stages, of which the first one is the production by mainly the effect of impact, the second is by the mutual frition between coal particles, and the third is by the plastic flow grinding between them. And moreover it proves that these processes can be expressed. by the variation of the distribution constant N in Rosin-Rammler equation.抄録全体を表示PDF形式でダウンロード (1127K) -
城 温三1952 年 68 巻 770 号 p. 389-394
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーThe author has already reported the results of the study of the boundary potential between gas and liquid phases. In this report, the stability and the effect of the bundary potential on the stability of the thin liquid film are described.
A new glass tube method is used to investigate the stability of the thin liquid film.
In the comparatively dilute solutions of inorganic salts, ζ-potential has more or less important effect on the stability of the thin liquid film.抄録全体を表示PDF形式でダウンロード (1133K) -
今井 秀喜1952 年 68 巻 770 号 p. 395-398
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーPDF形式でダウンロード (3616K) -
藤井 鹿三郎, 遠藤 源助1952 年 68 巻 770 号 p. 399-403
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーPDF形式でダウンロード (998K) -
滝本 清, 港 種雄1952 年 68 巻 770 号 p. 405-408
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーPDF形式でダウンロード (615K) -
房村 信雄1952 年 68 巻 770 号 p. 409-412
発行日: 1952/08/25
公開日: 2011/07/13
ジャーナル フリーPDF形式でダウンロード (782K)
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