巻号一覧
12 巻 (1962)
- 6 号 p. 349-
- 5 号 p. 283-
- 4 号 p. 221-
- 3 号 p. 143-
- 2 号 p. 69-
- 1 号 p. 1-
12 巻, 6 号
選択された号の論文の8件中1～8を表示しています
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千谷 利三1962 年 12 巻 6 号 p. 349-350
発行日: 1962年
公開日: 2008/10/30
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ソーダライト族化合物のアルミン酸ナトリウム溶液に対する溶解現象について清宮 滋, 森 重敏1962 年 12 巻 6 号 p. 351-354
発行日: 1962年
公開日: 2008/10/30
ジャーナル フリーThe dissolution quantity, at 60°C and 110°C, of various sodalite compounds synthesized in the liquid phase and also of red mud from the plant, in the sodium aluminate solution (with Na2O/Al2O3 molar ratio of both 3.2 and 1.6, with Na2O concentration of 150g/liter) was measured and the change of crystal structure of solid phase during dissolution was investigated.
The results obtained are summed up as follows:
(1) The dissolution quantity of zeolitic compounds which is believed to be formed during liquid phase is larger than that of sodalite compound and this is over 0.4g/liter as SiO2 concentration. However, this zeolitic compound transformed into sodalite at 110°C and the dissolution quantity becomes smaller.
(2) There is no great difference in the dissolution quantity of the different kinds of sodalite. Also, red mud indicates almost same degree of dissolution quantity as the synthesized hydroxy sodalite.
(3) There is a tendency for the dissolution quantity of sodalites to become smaller as the molar ratio of sodium aluminate solution becomes larger and also as the temperature becomes higher. The dissolution quantity of the various sodalites at 110°C is 0.12-0.16g/liter as SiO2 concentration in a solution with molar ratio of 3.2 and 0.18-0.23g/liter in a solution with molar ratio of 1.6.抄録全体を表示PDF形式でダウンロード (366K) -
友成 忠雄1962 年 12 巻 6 号 p. 355-358
発行日: 1962年
公開日: 2008/10/30
ジャーナル フリーOn my fresh impression obtained during the foreign travel (Europe and U. S. A. 1960-1961), the new trend of the electrolytic process of Aluminium production is shortly described.
The condition for minimum production cost
The total production cost of aluminium will be able to be analysed into several terms, that is to say electric power cost, raw material cost, labor cost, indirect expense and tax. However these terms are also respective functions of current density, using a definite plant. [Refer to equ. 5 (electric power for electrolysis) 7 (electric power for mechanical power and lightning) 9 (material cost) 10 (labor cost) 11 (indirect expense) 12 (amortization) 13 (tax)] Thus, the total production cost (W) will be shown by equ. 14 and 15 (approximate equ.) in which current density is the most important variable. If we assume that all variable except current density are constant, and partialy differentiate the formula 16 (simplified form of 15) with variable Id to get the condition making W take the minimum value, the equ. 20 will be obtained. Letting ∂W/∂Id=O, and solve this formula regarding to Id. Thus the ID=2C11/PC10√(PC10)2+4C11(PC9+C8) satisfies the required condition that the production cost of aluminium is minimum. In this formula P is electric power price/kWh, C10 is shown by equ. 18 in which C3 is the slope of equation representing overvaltage (=C2+C3 logId), and C11, C9 and C8 are given by the equations 19, 17and 13 respectively. In this equation (22) we can see that P and C11 have remarkable influence for the value of the most preferable current density because of C10 can not so greatly change whatever a kind of anode carbon is.
Operation with the most preferable current density
It is very sorry that I can't calculate the actual value of the most preferable current density because of I have no detail datas for industrial production of aluminium. Then, let us consider how do we can realize the best condition, if Id given by equ. 22 is larger than the current density now usefully used in plants. (1) Froced cooling of bed carbon will be required, otherwise bath temperature will rise and accordingly the current efficiency will be remarkably enlowered. (11) Keeping the Al2O3 conc. in bath as low value as possible to make specific resistance of bath low. And devising automatic controll of the Al2O3 conc.. (111) To apply rather large prebaked block carbon as anode and further, to design cell construction with slope or vertical surface as cathode, using new material.抄録全体を表示PDF形式でダウンロード (511K) -
財満 鎮雄, 多々 静夫1962 年 12 巻 6 号 p. 359-367
発行日: 1962年
公開日: 2008/10/30
ジャーナル フリーThe deep drawing tests were made for the purpose of studying on the control of directionality in the case of the continuous-cast 2S slab (145mm in thickness) being rolled into sheet, and also the correlation between the directionality detected by means of Knoop ratio (which has previously reported) or by means of etching pit and the earing in deep drawing test was examined.
The results are summarized as follows:
(1) In deep-drawing the annealed sheet, the earing is small when the one-way-or cross-way-rolled sheets, whithout intermediate annealing, are rolled with light reduction. The earing is also small when a heavy reduction is given to the annealed sheets.
(2) In deep-drawing the hardened sheet as rolled, the occurrence of ear is little, in case intermediate annealing and light reduction are given to the sheets.
(3) 85-95% cold-rolled sheet shows small earing in the 60-95% reduction.
(4) As the result of a study on the detection of directionality by means of etching pit, it is found out that, in the sheet having 0 or 90° ear, grains the etching pit of (100) or (110) of which are parallel with the rolling direction are more than those the pit of which is inclined with 45°, and, on the other hand, in the case of sheet having 45° ear, the grains which have the etching pit inclined by 45° to the rolling direction are more than those having the pit paralleled with the rolling direction. In the case of no occurrence of ear, the number of grains which have the pit paralleled with the rolling direction are as many as those which have 45° inclined pit.
(5) It is found out that there is a remarkable correlationship between the directionality detected by the Knoop ratio or by etching pit and the predominant orientation of grains.
(6) The directionality detected by the Knoop ratio indicates the occurrence of ear and the correlationship between them is remarkably found. It can be confirmed, therefore, that there is a possibility to forecast the occurrence of ear by measuring the Knoop ratio, if not the deep-drawing test made.抄録全体を表示PDF形式でダウンロード (1703K) -
潮田 豊治, 吉村 修, 井上 重雄1962 年 12 巻 6 号 p. 368-375
発行日: 1962年
公開日: 2008/10/30
ジャーナル フリーIt has been reported by Mr. M. Taurnaire on the analytical method of alumina in aluminium by means of separating alumina from aluminium with dilute hydrochloric acid solution.
This method is quite simple in operation and can easily applied to the routine analysis work in plants. But, it is considered that the accuracy in this method is not very good because alumina is solved into dilute hydrochloric acid, though slightly.
In this connection, the authors have investigated on the solubility of alumina when treated with dilute hydrochloric acid solution by the M. T. method, and on how to opperate the analysis in this method.
The findings are summed up as follows:
1. The solubility of alumina in dilute hydrochloric acid solution.
(1) The solubility of alumina in dilute hydrochloric acid solution decreases with the increase in calcination temperature of alumina.
(2) The solubility of alumina increases with the increase in the concentration of hydrochloric acid.
(3) The solubility of alumina increases slightly with the increase in standing time after the addition of hydrochloric acid.
(4) The temperature of solution is very important. The solubility of alumina increases as the temperature of solution is raised within the range of room temperature. It is especially increased when the temperature of solution is raised to about 40°C. To keep the accuracy of this method, therefore, it must be essential to keep the temperature of solution below room temperature.
(5) Amounts of alumina and volume of solution have no effect on the solubility of alumina.
2. Others
(1) The surface oxide of sample should be removed by use of sodium hydroxide solution and dilute nitric acid solution.
(2) For washing out the solution of absorbed aluminium from filter paper, 0.1 N hydrochloric acid and hot water are suitable.
(3) In the process of hydrofluoric acid-sulfuric acid treatment, metallic silicon, if present, can be volatized by the addition of few drops of nitric acid.抄録全体を表示PDF形式でダウンロード (847K) -
工業用純チタンKS-50のシートの品質と生産工程との関連性草道 英武, 宮本 一雄, 森口 昇1962 年 12 巻 6 号 p. 376-387
発行日: 1962年
公開日: 2008/10/30
ジャーナル フリーIn the previous report, the quality standards of the KS-50 commercially pure titanium sheet were clarified, and the result of the analysis of variance for regression of yield strength and elongation upon tensile strength was mentioned.
In this paper, the statistical analysis, by use of the control charts, is made on tensile strength, yield strength and elongation of the KS-50 commercially pure titianium sheet, which is manufactured from approx. 30tons of ingots produced by the high vacuum arc melting furnace of large capacity.
It was found out from the analysis that the variance within heats is less than that between heats. Then, those variances were analysed statistically, and the technical consideration was added to the conclusion.抄録全体を表示PDF形式でダウンロード (669K) -
社団法人軽金属協会 , 建築用軽金属委員会1962 年 12 巻 6 号 p. 388-394
発行日: 1962年
公開日: 2008/10/30
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小林 昌敏1962 年 12 巻 6 号 p. 395-408
発行日: 1962年
公開日: 2008/10/30
ジャーナル フリーPDF形式でダウンロード (1033K)
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