著者

高桑 豊志

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.111, no.10, pp.708-712, 1995-09-20 (Released:2011-01-27)

著者

角谷 博樹 立田 則男 工藤 万雄

出版者

The Mining and Materials Processing Institute of Japan

雑誌

資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan (ISSN:09161740)

巻号頁・発行日

vol.113, no.6, pp.440-445, 1997-06

被引用文献数

2

著者

佐々木 久郎 ディンディウェ チャールズ 安達 毅

出版者

The Mining and Materials Processing Institute of Japan

雑誌

資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan (ISSN:09161740)

巻号頁・発行日

vol.117, no.7, pp.604-612, 2001-07-25

参考文献数

17

被引用文献数

1

---

In this paper, a new concept for final pit shape in open pit design, Best Positive Inverted Truncated Cone (BPITC) algorithm, is presented for feasibility study and basic scheduling. Five mineral deposit models were used for eventual surface mine design optimization. Initially, geological reserve models were simulated by the utilization of GSLIB using randomly and regularly spaced drill hole data. Effects of varying anisotropy on the obtained metal quantities in reserves were also investigated. The BPITC was successfully applied to 100-times simulated deposit data set using Geostatistical simulation code GSLIB. The optimization results by BPITC were compared with those obtained by Positive Moving Cone (PMC) and Dynamic Cone (DC) based algorithms for the same mineral deposit models. The obtained results indicate that BPITC is superior to all the other optimizers. Concequently, the frequency distribution curves of profits and pit incremental feature by BPITC give effective information on mineral project decision-making and mining sequencing respectively.<BR>The conclusions from this study are summarized as follows:<BR>1. It was proved that for any type of deposit, the usage of correct anisotropic factors used in GSLIB lead to correct evaluation of reserves.<BR>2. All the profits / benefits computed for all the five model deposits show that a newly developed scheme named as BPITC can always indicate optimal solutions for final pit designs.<BR>3. Conclusively, the frequency distribution curves of profits and pit incremental feature by BPITC give effective information on mineral project decision-making and mining sequencing, respectively.

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

荒井 健男 咲間 修平 佐藤 義倫 篠田 弘造 JEYADEVAN Balachandran 田路 和幸

出版者

The Mining and Materials Processing Institute of Japan

雑誌

資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan (ISSN:09161740)

巻号頁・発行日

vol.119, no.12, pp.713-720, 2003-12-25

被引用文献数

1 2

---

Stratified materials are defined as materials with nano-sized stratification that have been artificially controlled and designed. They are exemplified as a thin layer or stacked layers formed on surface of semiconductors. The present research is aiming at formation of controlled and designed stratification on surface of fine particles, leading to improvement of properties of fine particles which has been difficult to accomplish through the conventional particles engineering, and to development of novel properties created by the stratification.<BR>Here, we describe the method of the development of the nano-size CdS catalyst with stratified structure that efficiently separates electron and hole during photolysis, especially, to produce hydrogen gas from hydrogen sulfide, H₂S. Furthermore, as an approach for the development of the practical use photocatalyst, ZnS-carbon nanotube complex was also made and examined. In a way, the stratified structure is considered to enable the production of a reaction system which simulates function in biological cells. Using this catalyst in the solution mixed with various materials such as, calcium hydroxide, seawater and H₂S, we succeeded in producing about 7.5l/h m² of hydrogen gas under the sunlight.

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

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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

芝田 隼次 奥田 晃彦

出版者

資源・素材学会

雑誌

資源と素材 : 資源・素材学会誌 (ISSN:09161740)

巻号頁・発行日

vol.118, no.1, pp.1-8, 2002

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The separation and purification methods of precious metals from the scrap containing precious metals are introduced in this review. The solid waste containing precious metals first is dissolved by the solution somprising oxidation agents and ligands, such as aqua regia, Cl2+HCL and NaCN+O2. The separation of precious metals in the leached solution or wasted solution is carried out by using various methods like classic precipitation, cementation, ion exchange resin, activated carbon adsorption and solvent extraction. It depends on the concentration and combination of precious metals what kind of separation method is applied. Generally, adsorption and ion exchange methods are applicable to the dilute solution, while precipitation, cementation and solvent extraction are used for the concentrated solution. In the recovery of the precious metals in automoble catalyst, the collection of the platinum group matels in Cu or Fe metals melted by a plasma melting method is performed as one of the recovery techniques by the pyro-metallurgy. The fundamental of separation and purification methods, and some commercial plant examples are described for recycling of precious metals.

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.