著者

竹島 敏正

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.110, no.13, pp.1011-1016, 1994-11-20 (Released:2011-01-27)

参考文献数

12

被引用文献数

2

著者

中村 俊男

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.84, no.963, pp.708-712, 1968-07-25 (Released:2011-07-13)

著者

杉山 博信 陳 友晴

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.135, no.10, pp.89-93, 2019-10-31 (Released:2019-10-31)

参考文献数

24

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12CaO・7Al2O3 electride is one of the outstanding materials expected to be applied in various fields such as electronics and catalyst, and generally fabricated by sintering high purity CaCO3 and Al2O3. We attempted to fabricate 12CaO・7Al2O3 electride using limestone as a raw material instead of using high purity CaCO3 aiming at further industrial use, and investigated the gas adsorption properties of the fabricated samples. Three samples, two from limestone and one from high purity CaCO3, were prepared and exposed to the atmosphere for about 9 hours, and then the gas adsorption properties of them were analyzed by Py-GC/MS. As a result, desorption of N2 and O2 which are abundant in the atmosphere was not observed by heating the samples exposed to the atmosphere up to 700℃, while desorption of CO and CH4 was identified. It is implied that the desorbed CO originates from CO2 in the atmosphere. This result indicates these samples might selectively adsorb CO2 and CH4 as compared with N2 and O2. Furthermore, for the limestone derived samples, the selectivity of CO2 and CH4 adsorption was improved and this result indicated the possibility that the CO2 adsorption capacity of these samples is higher than that made from high purity CaCO3. One reason of this phenomena is inferred the changes in the electronic state of material surfaces due to the doping of impurities contained in limestones, such as Mg, Sr, and Cu, into the Ca sites of the cage-like structure in 12CaO・7Al2O3 electride.

著者

干場 一矢 ポヌ ジョジアヌ ドドビバ ジョルジ 伊藤 紘 佐瀬 佐 松井 裕史 藤田 豊久

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.134, no.11, pp.151-157, 2018-11-30 (Released:2018-11-08)

参考文献数

35

被引用文献数

2

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Recently, calcined dolomite has been used as an anti-bacterial material in various applications for improving public health. Generally speaking, calcined dolomite exhibits anti-bacterial effects due to its strong alkalinity after hydration. There are authors who have reported that the calcined dolomite can generate Reactive Oxygen Species (ROS), although there are other authors who were not able to detect it. Since the anti-bacterial mechanism of the calcined dolomite is not yet very clear, it was subject to ESR (Electron Spin Resonance) spin trapping method in order to confirm the generation of the hydroxyl radical. In this work, the hydroxyl radical was detected from calcined dolomite - hydrogen peroxide (H2O2) suspension. It was found that dolomite, calcined at the relatively higher temperature between 800℃ and 1000℃, enables faster H2O2 decomposition. The results of this work indicate that calcined dolomite suspension generates hydroxyl radicals in the presence of H2O2.

著者

河村 光隆 角館 慶治 鈴木 俊夫

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.116, no.3, pp.161-166, 2000 (Released:2001-11-23)

参考文献数

15

被引用文献数

3 3

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Chlorine flow in Japan in 1995 was surveyed from the viewpoint of industrial metabolism using a substance flow analysis method. About 3,543 kt / year of chlorine mainly manufactured by electrodialysis of imported salt is converted to various chlorinated substances and consumed. Finally they are emitted as chlorinated organics, salt, ionic solution or polymers into the environment. The industrial metabolism structure of chlorine shows dendritic flow representing mainly raw-product chain relation in chemical reaction. Recycling flows in the metabolism structure can be found in hydrochloric acid , solvent , flon and PVC. Especially the PVC flow diagram has been analized through the usage of PVC. It has been concluded 1,000 kt / year of PVC is accumulated in Japan.

著者

中野 実

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.76, no.869, pp.829-835, 1960-11-25 (Released:2011-07-13)

著者

清水 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.113, no.10, pp.776-779, 1997-10-25 (Released:2011-01-27)

被引用文献数

1 1

著者

田崎 和江

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.12, pp.827-835, 1996-10-25 (Released:2011-01-27)

参考文献数

18

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Bacteria play an important role in various transportation, concentration and crystallization processes of elements in the earth environmental system.Microbial mineralization is a key role for the concentration of toxic elements and spoiled water systems.Electron microscopic studies have disclosed crystallization of turquoise and jarosite in the early stage of the remediation experiment, conducted at room temperature, by using activated sludge.Amorphous materials concentrated on cell walls at incipient stage, are finally transformed into well-defined crystal structure of biominerals.Various minerals such as carbonate, silicates, iron oxide, hydrate phosphates, sulphides and radioactive materials are produced through bacterial biomineralization and microbial remediation processes.In addition to biomineralization, biodegradation of a variety of hazardous and toxic chemicals in the abandoned mining sites, concrete erosion and river-water ecosystem etc., has also been found.

著者

クルチリン B. N.

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.83, no.951, pp.958-960, 1967-07-25 (Released:2011-07-13)

著者

高桑 豊志 ワイルド G. プラウド D.

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.11, pp.769-772, 1996

著者

桑原 順子

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.133, no.5, pp.92-97, 2017-05-01 (Released:2017-05-31)

参考文献数

14

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Basella alba is an annual plant, which grows leaves that look like spinach. The leaves of Basella alba are edible, but effective methods of using fruits have not been reported yet. The fruits of Basella alba are vivid purple, and there is a possibility of being effective for products such as foods and cosmetics. To improve the appearance of products or to make use of the color sense derived from raw materials, pigments are also added and retained in the products. Various kinds of surfactants are added in food, cosmetics and daily toiletries for emulsifying oil and water. Many kinds of additives are also mixed in all products. All products are exposed to light in the sales process for the prolonged storage time at shops and homes. Furthermore, product users are also exposed to sunlight, and raw materials of the products would receive stimulus of the sunbeam. Such an environmental stimulus should be assessed in the product with pigment–surfactant mixed system. In this study, we investigated two types of discoloration in heating the natural pigment–surfactant mixed system by irradiation of artificial sunlight. In the experiments with artificial sunlight irradiation, under the condition that the surfactant concentration was higher than critical micelle concentration, the decolorization rate of Basella alba extract increased. Also, their decolorization rate was affected by dissolved oxygen.

著者

西川 豊 大西 重吉郎 野村 幸三郎

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.69, no.784, pp.395-403, 1953-10-25 (Released:2011-07-13)

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This paper explains the general plan for coal mining by such shafts as main winding shaft (No.1 shaft), main up-cast shaft (No.2 shaft) and:blind shaft for conveying packing materials at Mitsui Sunagawa Coal Mine. The further explanations given here are those about the outline of structure of the main winding shaft, process of its sinking work, and the winding equipment.

著者

斎藤 敏夫 相原 三男 吉井 勝敏

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.12, pp.654-658, 2006-12-25 (Released:2009-10-02)

参考文献数

1

---

The major mines around the world are taking the steps for enlargement of the dump truck size to improve the efficiency, and the yearly demand for the 300ton class dump trucks is increasing year by year.About 25% of the total world demand for such 300 ton class dump trucks is predicted to be the demand for the oilsand mines where the demand for the hydraulic shovels looks promising as well.The super large size excavator EX8000 was developed to meet such demand for the matching shovels for the 300 ton class dump trucks.The development was carried out based upon the experience from the existing super large size excavators, and emphasized on achieving the unsurpassed reliability and availability that is the absolute necessity for the loading machines in the mines.Both the first machines, the second machines of EX8000, and the third machines are delivered to the oil Sand mine in Alberta state in Canada. These machines are engaged in digging up the topsoil layer and the oil sand.

著者

西松 裕一

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.87, no.1005, pp.920-923, 1971-11-25 (Released:2011-07-13)

参考文献数

14

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

外尾 善次郎 小出 治彦 幡谷 敬二 文蔵 良 橋谷田 次郎 尾石 照雄 酒井 証

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.74, no.843, pp.535-552, 1958-09-25 (Released:2011-07-13)

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Underground working place in coal mine in Japan became dipper and dipper, and we can not product coal so efficiently with our mining system, so called “inclined sys em.”In order to more efficiently product coal, many people recognized, it is necessary to adapt the mining system in Europe, for instance in Germany and France, namelly so called “horizontal system”.It is said, the translation from the inclined system to horizontal system is for our coal mine in Japan very urgent and important problem.After War, many shafts were already excavated for the above mentioned purpose. As we know in Japan, many superior shaft sinking technic in Europe especially in Germany was introduced and technic in Japan was also very improved. But it is not yet so gut as in Europe. Till today many mechanization and rationalization was achieved, for instance, mechanization of loading (Adaption of Greifer) and rationalization of working system etc. Sinking speed in Japan is about 40-50m, in Europe. about 50-70m per month. In U. S. S. R, it is said, they excavated per month 241.1m.From now ono we must force to achieve the mechanization of not only loading, but bohring, walling as in U. S. S. R. and also the rationalization of working-system and cycle.

著者

八木 良平 岡部 徹

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.132, no.7, pp.114-122, 2016-07-01 (Released:2016-07-30)

参考文献数

71

被引用文献数

8

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Rhenium (Re) is used as an additive in several alloys, such as nickel-based superalloys for jet engine turbine blades, platinum catalysts for oil refining, and thermocouples used at ultra-high temperature, in order to improve strength and stability at high temperature. Due to the rare and unevenly distributed nature of Re, there is risk of supply disruption owing to supply shortage and the rapid increase in Re price. To minimize the risk of a supply disruption, processes for recycling Re from Re-containing alloys and catalysts have been developed. In this article, we review characteristics of Re-containing materials and the current status of Re recycling; we also introduce some recent recycling technologies for recovering Re from various scraps.

著者

笠井 誠 小林 与生 東郷 政一 神谷 昌岳 近藤 充記 脇原 徹 中平 敦

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.133, no.8, pp.182-187, 2017-08-25 (Released:2017-08-17)

参考文献数

18

被引用文献数

1

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Various zeolites were synthesized though hydrothermal treatment of perlite with alkaline solutions in order to facilitate effective use of the discarded perlite. Perlite is volcanic glass mainly composed of amorphous aluminum silicate and its composition is a main component SiO2 and Al2O3 with less impurities such as heavy metals. Therefore, zeolite synthesis from perlite is more convenient compared to from other waste materials (slag, ash, etc.). The obtained zeolites were analyzed by X-ray diffraction and SEM. As the result, FAU, PHI, SOD and CAN zeolites were able to be generated from perlite by changing the hydrothermal treatment condition.

著者

西山 孝

出版者

一般社団法人 資源・素材学会

雑誌

日本鉱業会誌 (ISSN:03694194)

巻号頁・発行日

vol.88, no.1015, pp.572-575, 1972-09-25 (Released:2011-07-13)

参考文献数

4

著者

友清 芳二 松村 晶

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.133, no.3, pp.58-67, 2017-03-01 (Released:2017-03-31)

参考文献数

44

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Transmission electron microscopy has been playing an important role in research and development of nanotechnology which is common and fundamental in various fields of science and technology such as energy, environmental sciences, information and telecommunications, and life sciences and etc. A transmission electron microscope (TEM) provides us with crystallographic information and positional information from a local area of specimen. Furthermore information on local chemical composition and atomic bonding state is obtained provided the TEM is equipped with an X-ray energy dispersive spectrometer (XEDS) and an electron energy loss spectrometer (EELS). The image resolution and special resolution of elemental analysis have been improved to an atomic level together with the development of an analytical TEM that has a field emission gun, an aberration corrector and a function of scanning TEM (STEM). It has been possible to extract high quality and various information on substance and materials, owing to the development of electron detectors and imaging techniques of STEM. Objects of TEM observation have been widely spread after the development of related techniques such as preparation of TEM samples and controlling of specimen environment (heating, cooling, gas pressure, stress application etc.). We introduce recent trend of transmission electron microscopy and demonstrate some applications to green nanotechnology which is closely related to development of renewable energy, energy saving, energy storing, saving of rear resource, removal of harmful substance from air and water and so on.