著者

内山 恭輔 松田 健男 松森 豊己

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.109, no.12, pp.1082-1086, 1993-12-25 (Released:2011-01-27)

被引用文献数

2 3

---

The Oheyama plant of Nippon Yakin Kogyo Co., Ltd. was built here at Miyazu city in 1942, for treatment of low grade nickel oxide are (0.4-0.7% Ni) from nearby Oheyama mine by Krupp-Renn process. but at the end of war in 1945, the nickel smelting operation was stopped.In 1950, the Kawasaki plant of Nippon Yakin Kogyo Co., Ltd. succeeded in producing stainless steel for the first time in Japan by oxygen top blowing in an arc-furnace, paving the way to mass production of stainless steel. This achievement quickly increased the demand for nickel, an important raw material of stainless steel, making the Oheyama plant resume its operation in 1952 by switching to higher grade nickel oxide ores imported from New Caledonia. Thus Nippon Yakin Kogyo Co., Ltd. established a vertically-integrated production process from Ni smelting to finished stainless steel products for the first time in Japan.Since then the process of the Oheyama plant has been greatly modified and developed to establish “Nippon Yakin Oheyama Process”, the only method in the world that uses a rotary kiln for smelting nickel oxide ores.The nickel ores are first ground by both dry and wet methods and blended well with anthracite and limestone, to be formed into briquets. They are first dried and preheated efficiently in a grate directly connected with a rotary kiln and then charged into the kiln, where all the metallurgical reactions such as dehydration, reduction, slag-formation and refining by excess air near discharge end, occur to form ferro-nickel nodules (0.3-20mm).The Oheyama Process is considered a very useful method to obtain nickel material for stainless steel production, because its low energy cost as well as individuality of its product, easy to handle and almost free of impurities, help significantly reduce the cost of stainless steel production.The Oheyama plant is now producing 1, 150t of Ni as ferro-nickel a month, and besides, 35, 000t of byproduct, “NAS Sand” a month from slag, which is mainly used as public works materials such as asphalt aggregate, concrete aggregate and so on.Situated near Amano-hashidate, one of Japan's Three Famous Views, the Oheyama plant pays full attention to protecting the surrounding environment and to existing in harmony with nature.

著者

大和 昇

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.109, no.9, pp.684-687, 1993-09-25 (Released:2011-01-27)

著者

遠藤 一

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.106, no.11, pp.698-700, 1990-10-25 (Released:2011-01-27)

参考文献数

3

著者

鈴木 勝彦

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.113, no.10, pp.764-767, 1997-10-25 (Released:2011-01-27)

著者

熊川 幸平

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.122, no.10_11, pp.537-541, 2006-11-25 (Released:2009-09-18)

---

The Nagasaki Coal Mine Technology Training Center was established following the closure of Matsushima Coal Mine Co. Ltd. in November 2001. A part of mining concession area formerly owned by Matsushima Coal Mine was then purchased to be used as training facilities. The training program is focused on transfer of coal mine technology, and conducted by NEDO (New Energy and Industrial Technology Development Organization). The objectives of the training program is to promote the transfer of technology on underground coal mining to engineers from coal producing countries such as China, Indonesia, and Vietnam. For these countries, the technology will serve as valuable tool to face changes that will likely occur in near future. These changes include a shift in mining method from open cut to underground mining, or deterioration in mining conditions as mining locations become deeper and deeper. Through the technological cooperation and transfer of Japan's coal mining technology, efforts were made to achieve the stable coal supply-demand in Asian region and stable supply of foreign coal to Japan.

著者

小野 章

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.109, no.12, pp.1077-1081, 1993-12-25 (Released:2011-01-27)

被引用文献数

1

---

Hyuga Smelting Co., Ltd. established by Sumitomo Metal Mining Co., Ltd. started production of ferronickel by Sintering-Electric Furnace Process in September; 1956, which is now owned by Sumitomo Metal Mining Co., Ltd.(60%), Nippon Steel Corporation (25%) and Mitsui & Co., Ltd.(15%).In accordance with the rapid increase of the market demands, the company made a steady growth, expanding the production capacity from 30 to 200 tons of nickel per month. Because the further expansion required greater productivity and broader acres, the new plant was built at present site in the coastal industrial quarter adopting Rotary Kiln-Electric Furnace Process in 1968.Since the improvement of the process, the development of new products and the energy curtailment of the whole plant have been achieved, Hyuga Smelter has become one of the most advanced coastal ferro-nickel smelters, boasting of most modern facilities and incompetitive technical knowledge.Production capacity is 1, 500 tons of nickel per month.

著者

宮原 要 舘 幸男 牧野 仁史 高須 亜紀 内藤 守正 梅木 博之

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.117, no.10, pp.801-807, 2001 (Released:2006-01-08)

参考文献数

23

被引用文献数

2 1

---

The second progress report, H12, documented research and development progress for the high-level waste disposal made since the publication of the earlier the first progress report (H3) in 1992. The concept of geological disposal in Japan is similar to that considered in other countries, being based on a system of multiple passive barriers consisting of the geological environment and an engineered barrier system. The disposal system considered is generic, in the sense that no single rock type and no siting area have so far been identified. H12 performance assessment provided a test for the robustness of the system concept based on intentional siting and design, taking account of a wide range of Japan's geological environment. The assessment included a comprehensive evaluation of uncertainty and potentially detrimental factors, including perturbations due to external events and processes. Despite the considerable uncertainty at the current stage of the Japanese program, a safety case that is adequate for the aims of the assessment can be made by a strategy of employing conservatism where there is uncertainty and stressing the reliability and effectiveness of the performance of the near field. The aim of this paper is to summarize arguments that should build confidence in the findings of the H12 assessment.

著者

小林 佑司

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.105, no.11, pp.779-781, 1989-10-25 (Released:2011-01-27)

著者

正路 徹也 小林 祥一 孟 憲国 金田 博彰

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.112, no.10, pp.683-687, 1996-09-25 (Released:2011-01-27)

参考文献数

2

---

The availability of GPS (Global Positioning System) has been examined in three areas. The first is a fixed point on the roof of a building of the University of Tokyo. The second area is around the Hishikari gold mine, southwestern Japan. The area was selected because topographic maps (1/25, 000) are published. The topography consists of gentle hills. The third area is Yunnan Province, southwestern China, where foreigners are prohibited to use topographic maps. The surveyed area is mostly mountainous. Measured values at the fixed point are scattered within 100m from the true position. The average point is located 30m south from the true position. In the Hishikari area, each GPS value is compared with the coordinates given by a topographic map. The deviation between the GPS value and the coordinates is within 300m. The reason why the deviation is larger than the error at the fixed point is that the coordinates given by a map includes error. In Yunnan, the accuracy was checked by the reproducibility. At many sites, satellites were not found because of steep slopes and high trees. A relatively wide space was located, however, within 300m from each site. When 4 satellites were found in wide areas, values were scattered in a circle with a diameter of 200m. When 4 satellites were found in narrow areas, the diameter was 500m. When only 3 satellites were found, the diameter was 1, 000m. These values are larger than the error of the pacing (less than 10 m for 100m distance). The result suggests that the GPS can provide location data with the accuracy enough to geoscience discussions in regional scales.

著者

国吉 実 村上 次雄 溝田 忠人

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.118, no.3,4, pp.191-196, 2002 (Released:2006-01-31)

参考文献数

10

被引用文献数

3 3

---

Sodium bicarbonate is so unstable that the rate of decomposition is strongly affected by even trace amount of water in the powder. Variously hydrated species may be formed on the surface as decomposition products from sodium bicarbonate to sodium carbonate. In order to clarify the decomposition-mechanism and chemical-stability of the material, a method of quantitative analysis has necessarily been developed to determine the minute amount of free water and crystalline water related to variously hydrated salts. Preceded to the present work, therefore, four analytical methods established so far were examined to select the suitable method for the present object. The Karl-Fischer titration method combined with a moisture evaporator was finally selected by adding an analytical process, in which the dehydration amount-time profile is deconvoluted into several different peaks corresponding to the state of water. The fractional evaporation of various states of water enables the quantitative analysis without any pretreatment of the sample. This fractional quantitative analysis may be explained by the difference of thermal-stability among those of sodium bicarbonate, sodium carbonate hydrate and sodium sesquicarbonate.

著者

永崎 靖志

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.112, no.6, pp.360-364, 1996-05-30 (Released:2011-01-27)

著者

島田 荘平 藤沢 義郎 松田 範之

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.112, no.7, pp.429-438, 1996-06-25 (Released:2011-01-27)

参考文献数

44

---

Due to the import of cheap primary energy resources, the German domestic coal mining industry is forced to rationalize the organization and to reduce the production cost. Though the economical situation is stil severe, the new R & Ds and the improvement of practical technologies have been continued in a limited budget range. Many of them are remarkable technolgies to overcome the severe underground mining conditions and to increase productivity and to improve safety performance.This report summarizes the recent R & Ds and practical technologies developed in German coal mining industries. It includes technologies on coal cutting, roadway drivage, material and man transportation, roadway maintenance, safety devices, utilization of mined-out space and safety management. The tndency of these technologies is described in conclusion.

著者

大竹 信彦

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.109, no.6, pp.409-416, 1993-06-25 (Released:2011-01-27)

参考文献数

5

被引用文献数

1 1

著者

吉田 慎 藤野 茂 森永 健次

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.120, no.8, pp.451-454, 2004 (Released:2006-04-27)

参考文献数

7

被引用文献数

2 3

---

Transparent pyrex glasses were obtained by sintering a green compact, which was fabricated by using CIP method for pyrex glass powder, in diverse atmosphere (air, Ar, He and vacuum (10-2Pa)) at 973-1173K. Effects of sintering conditions (temperature and atmosphere) on transmittance of sintered glasses were investigated. Devitrification resulting from crystallization of cristobalite arose in all atmosphere at temperatures over 1023K. Optimum sintering condition for fabricating transparent sintered pyrex glass was at 1003 K for 1hour in a vacuum (10-2 Pa) or He atmosphere in this work. The transparency was 15∼20% in visible region and was about 60% in infrared region. The relationship between transparency and condition of the sintered glasses was discussed in terms of permeation constant of gas species during sintering.

著者

山下 秀 杉本 文男 山内 優 森 聡 ナムスライ デンベレル

出版者

The Mining and Materials Processing Institute of Japan

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.113, no.11, pp.817-824, 1997

被引用文献数

4

---

In this study, drained creep tests under uni-axial compressive load were carried out on Kimachi-sandstone to clarify the creep process and mechanism of the soft sedimentary rock.<BR>During these experiments, axial strain, lateral strain and the Acoustic Emission (AE) activity were observed in the loading time intervals of several minutes to one month.<BR>Furthermore, thin sections for microscope were made of the tested specimens and micro-photographs on these sections were taken by a microscope. On these micro-photographs, using an image processing technique of a micro-computer, numerical data for the changes of pores and micro-cracks at controlled creep time or at prescribed creep region were acquired.<BR>The main results obtained from these tests are as follows; 1) In loading process of the creep load on a rock specimen, firstly the axial strain rate is shown to decrease gradually to a minimum value, after it increases gradually and finally it increases rapidly, and then the specimen is going to fail, 2) In the process of decreasing the axial strain rate, closure of pores in the rock occurs and the compacting of the rock takes place. But, the compressive strength of the specimen, which is unloaded in this loading process, is not affected by the loading time and is almost the same as that of the intact rock, 3) In the process of increasing the axial strain rate, that is after passing through the minimum point of the axial strain rate, cracks in the specimen develop toward the direction parallel to the loading axis. And also, the compressive strength of the specimen, from which load is removed in this process, decreases as compared with that of intact rock.

著者

鈴木 忠

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.109, no.9, pp.707-709, 1993-09-25 (Released:2011-01-27)

著者

本庄 鉄弥 土屋 範芳 中塚 勝人

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.111, no.4, pp.205-211, 1995-04-25 (Released:2011-01-27)

参考文献数

37

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Self-Organizing Neural Network (SONN) was constructed for the purpose of mineral identification. This system consists of two different kinds of networks, Kohonen's Self-Organizing Map and three layer feedforward neural network based on the back-propagation learning algorithm. The former step, Self-Organizing Map, could divide minerals into some categories by the similarities on the selected characteristics of minerals. This rough division of whole input patterns on feature maps was closely analogous to the first step of classification by human brains. The later step, each category had the three layer feedforward neural network independently, and then the minerals belonging to the same category could be identified.In this study, 82 minerals were identified by 5 characteristics of cleavage, metallic luster, Mohs hardness, streak, and color. Some minerals have plural input patterns on the 5 characteristics mentioned above. Therefore, total number of input patterns was 119 for 82 minerals.After constructing the feature maps and the back-propagation learning, this system could suggest the suitable mineral name for unlearning input patterns. The advantage of the proposed method is that scaling up of the system is possible with relatively small increase in learning times. Further, it should be stressed that this technique can be used in other problems where recognition and identification are necessary.

著者

冨永 博夫 辰已 敬

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.107, no.1, pp.2-7, 1991

被引用文献数

2

著者

島 政雄 川北 鎮雄 森 誠治

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.107, no.2, pp.85-94, 1991

被引用文献数

4

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These descriptions about recycling of copper, lead and zinc are respectively summarized as follows:<BR>Copper: One of the problems of copper's recycling is that the cost for collection of scrap copper is very expensive, because copper is diversified into many merchandizes. And as the value of copper is unstable, it is difficult to get the stable collection continuously.<BR>Lead: The increasing tonnage and percentage of the use for lead-acid batteries were found to be the significant feature. The recycling rate of lead depends much on that of spent lead-acidb atteries. It was concluded that further improvement of the recycling rate would be required especially through the increased collection of spent batteries and treatment in primary lead smelters.<BR>Zinc: The recovery of recycled zinc has been increasing its importance from the viewpoints of resource conservation, pollution control and saving land-fill sites because Japan is quite poor in natural resources.

著者

吉田 豊 門脇 良一 畑中 雅彦 坂口 威 西辻 昭

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.111, no.4, pp.219-224, 1995-04-25 (Released:2011-01-27)

参考文献数

23

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In the past, many methods of measuring gas concentration were developed. However, limitations lixe; selectivity in the kind of gases the system can measure, range of gas quantity and pre-treatment requirements prevented the wider applications of these techniques.The objective of this research is to develop a method for measuring gas concentrations that is free from the above mentioned limitations. In this regard, the principle and the technique of measuring the sound generated by the spectral diffraction of a laser beam was investigated.This technique is fundamentally different from any other usual spectroscopic analysis: this is an indirect method which measures the acoustic pressure emitted from gas when the photo energy is supplied to it.First, miniaturized laser equipment was fabricated based on diagrams and gas flow type. Then the primary parameters in this system in terms of the sensitivity of this system are the following; the laser's power output, the chopping frequency and the acoustic cell shape. The influence of these factors on the sound generated by the beam were investigated.As an condition of this system, a CO2 laser with output power of under 5.0W, a radial cell and a chopping frequency of 20Hz were chosen. As a result of the experiments under this condition, we confirmed that acoustic signal is proportional to gas concentration of single and mixture gas.For high sensitivity analysis of measuring acoustic signal, the noise characterics in measuring system, which was occured by discharge tube of laser, microphone, acoustic cell and so on, were measured and were eliminated. The new discharge tube of laser without noise was fabricated. And we maked out for the about thirty kinds of diameter, axies lenngth and mass of acoustic cell. The chopping frequency was chosen outside for frequency of noise. It was found that the gas concentrations of Ethylene was measurable in the ranges of concentration 1ppm-10%.