著者

小林 哲 隅田 洋

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.1087-1090, 1993-12-25 (Released:2011-01-27)

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Takehara Plant of MMS is located in the city center of Takehara, near the National Park of Seto Inland Sea. At present, 40 different products are manufactured at our plant, including non-ferrous metals, various battery materials and chemical products.Commercial production of Electrolysis Manganese Dioxide (EMD), begun in 1949, was small about 5 ton/month, and the plant was gradually expanded so that it had a monthly capacity of 2, 100 tons in 1982.Our EMD is specifically used for ZnC12, Alkaline and Lithium batteries, therefore EMD's high quality is very important. In this paper, the outline of our process and improvement in our plants and quality are described.

著者

島田 昌彦

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.111, no.2, pp.67-69, 1995-02-25 (Released:2011-01-27)

参考文献数

6

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Characteristics of high fracture strength and high fracture toughness of zirconia in yttria doped tetragonal zirconia polycrystal (Y-TZP), Y-TZP/Al2O3 composites and ceria doped tetragonal zirconia polycrystal (Ce-TZP) are described in this paper. The maximum fracture strength of Y-TZP/Al2O3 composites is 2, 400MPa at 30°C The maximum fracture toughness of Ce-TZP is 20 MPam1/2It is found that hot isostatic pressing is effective to eliminate fracture origins such as pore. From the results of thermal shock behavior of Y-TZP with various grain sizes by the water quenching method and the tetragonal to monoclinic phase transformation by using Raman microprobe spectroscopy, it is found that the critical quenching temperature different of Y-TZP increases from 250°C to 425°C with increasing grain size from 0.4 to 3.0μm.

著者

川上 武文

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.801-803, 1989-10-25 (Released:2011-01-27)

著者

古川 博文 松井 紀久男 島田 英樹

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.121, no.9, pp.446-455, 2005 (Released:2007-02-24)

参考文献数

6

被引用文献数

1 3

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India is the third largest coal producer in the world and has substantial coal reserves. It produced about 340 million tons of coal in 2002-2003. Open cast production accounts for 80% of the total output and the remaining 20% is from underground. The share of the underground output in the total production is expected to remain at the current level through 2010 even as the coal production increases. Despite its huge resource of coal, the quality of Indian coal is not so good. A considerable amount of good quality coal deposits in India lies in the thickness range of 5-12 m. However, an appropriate mining method for such thick seams could not be developed so far.The coal's share of total electric power generation in India is 75.5% in 2001. Because it is a reliable, domestic, and low-cost source of fuel, coal has played and will continue to play a significant role in the development of the Indian economy. Production, processing, and consumption of coal, however, can have significant environmental impacts, if not properly managed.The paper describes the present situation of the Indian coal mining industry, discusses problems in thick seam mining methods, and proposes a new mining method for thick seams considering today's environmental issues in Indian coal mining.

著者

水落 洋一

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.122, no.12, pp.601-605, 2006-12-25 (Released:2009-10-02)

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To maintain the big mining operation rates for 700kt/day material movement at Batu Hijau Mine in Indonesia, many modern technologies have been employed. Some of them are introduced in this report. They seem to be traditional in one glance but you may find that they are the state of art technology of modern mining applying in the unique style.

著者

堀井 善司

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.108, no.8, pp.575-578, 1992-08-25 (Released:2011-01-27)

被引用文献数

1

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This is to describe a Large Offroad Dump Truck Unmanned Navigation System used in Torigatayama Limestone Quarry.The system has been developed with cooperation of Nittetsu Mining Co., Ltd. and Shin Caterpillar Mitsubishi Ltd. and equipped on CAT 777B (85 tons payload). The system has been in production use.The Unmanned Truck enables high speed travelling under severe climatic conditions.The Unmanned Dump Truck Navigation System has following features.1) The system is an Autonomous Guidance System and does not need large ground facilities such as guiding lines.2) The system is of all weather type and can be used day and night under severe climatic conditions in quarries.3) The system is composed of multiple fail-safe constructions.4) The system is fleet system that controls a set of trucks as a fleet.5) The system has a learning function of a loading position.6) The system has maximum ground speed of 30 km/hr in forward and 10km/hr in reverse, which enables high speed travelling.

著者

伊藤 聰 阿座上 竹四

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.3, pp.185-190, 1993-03-25 (Released:2011-01-27)

参考文献数

12

被引用文献数

2 1

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Phase relations in the Fe3O4-ZnFe2O4-Fe2O3 system at 1, 100 K have been determined by the X-ray microanalysis and X-ray diffraction studies of the quenched samples. The results show that in the Fe304-ZnFe2O4 system magnetite (Fe304) and zinc ferrite (ZnFe2O4) form a complete series of solid solutions which is in equilibrium with the Fe2O3 that is practically pure.The activities were measured by an e. m. f. method using the stabilized zirconia solid electrolytes. Both the activities of magnetite and zinc ferrite in the Fe3O4-ZnFe2O4 solid solutions coexisting with the Fe2O3 exhibit slightly positive deviations from Raoult's law at 1, 100 K. The activity coefficient at infinite dilution, γ0ZnFe2O4 at 1, 100 K was estimated at 2.2.Lattice constants for the Fe3O4-ZnFe2O4 spinel solid solutions in equilibrium with the Fe2O3 obey Vegard's law. It was also found that the excess Gibbs energy of mixing in the Fe3O4-ZnFe2O4 solid solutions coexisting with the Fe203 at 1, 100 K showed small values. These two results are interrelated in the similar behavior, which suggest that activities are closely connected with crystal structures.

著者

原田 道昭

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.107, no.2, pp.147-153, 1991-02-25 (Released:2011-01-27)

参考文献数

13

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Coal ash produced in Japan has been annually increased because of the energy conversion from oil to coal in electric utilities and industries. Coal ash was produced about 7 million tons in 1989 and estimated as much as 14 million tons in 2, 000. It is necessary to decrease a disposal of coal ash and to promote a effective utilization of it.This paper shows an overview of the productions, origins and natures of coal ash, and some technological developments for effective utilization of coal ash, such as the manufacturing of artificial lightweight aggregates, artificial potash manure and SO2 absorbent made from coal ash and lime, and the recovery of metals from coalash.

著者

鶴見 憲二 藤井 伸一郎 中川 哲夫

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.111, no.6, pp.381-386, 1995-06-15 (Released:2011-01-27)

参考文献数

1

被引用文献数

1 4

著者

出口 衛 幾世橋 広 榎本 兵治

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.111, no.8, pp.537-542, 1995-07-25 (Released:2011-01-27)

参考文献数

20

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In order to investigate the effect of moisture on the effective thermal conductivity of porous rocks, eighteen rocks conditioned at dried, moist and water-saturated conditions were used for measuring the thermal conductivity by a transient hot wire comparison method developed by Deguchi, et.The moist rocks were conditioned in the atmosphere of 20°C and 60% relative humidity. This condition was adopted on the base of X-ray analysis of montmorillonite to simulate the natural dry condition, at which montmorillonite contained two layers of water in its interlayers.The results showed that the effective thermal conductivities of all rocks increased with increase of water in the pore. The conductivity of zeolite rocks is most affected by the degree of saturation of water. The thermal conductivity of water-saturated rocks is 1.2 to 2.5 times higher than that of the dry rocks.

著者

海見 悦子 高橋 栄二 橋口 大介 藤原 和弘

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.1, pp.1-11, 2006 (Released:2007-02-24)

参考文献数

41

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Recently, many and various microbial products appear on the market. However, almost all of them could not have sufficient effects. The expectation of users to microbial products is rising up. It is because of the directions for the environmental friendly and sustainable industrial activity. In addition, it is expected that the development of genetic engineering can make the possibility for the practical use of potential ability of microbes which is still not known.There are two major problems in practical use of microbial products. First, the transplanting of microbes into the target environment is not easy. Because, many indigenous microbes are inhabit in the industrial field and they doesn't allow introduced microbe(s) to be dominant in the field. Moreover, the environment of target fields is very fickle for introduced microbes. Second, the insufficient information of products promotes the misunderstanding to the users for the effect of the products.To the practical use of microbial products in the industrial fields, the researches and developments of reliable and effective products are required. Thereby, the preparations of special feeding and habitat are important for introduced microbes. Moreover, the analyses of microbes transplanted in the industrial fields are important to guarantee both the quality of the products and the correct information to users.The purpose of this communication is the clarification of present challenge for the practical use of microbial products in the industrial fields. Then, this communication suggests the several ways for the research and development of reliable microbial products and useful analytical methods for microbial community by genetic engineering.

著者

松本 良

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.108, no.7, pp.511-520, 1992

被引用文献数

2

著者

馬越 佑吉

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.9, pp.689-694, 1994-08-25 (Released:2011-01-27)

参考文献数

17

被引用文献数

1

著者

島田 荘平

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.12, pp.923-930, 2001-12-25

被引用文献数

4 6

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There are many types of geological formations used for CO₂ sequestration. Coal seam is one of them. The characteristics of the coal seam used for CO₂ sequestration are the methane recovery when CO₂ is sequestrated. CO₂ is injected into coal seam not only for the CO₂ sequestration but also for CH₄ recovery (ECBMR).<BR>This paper reports the sequestration mechanism of CO₂ in the coal seam and the world R&D status in this field.<BR>The adsorption is a main sequestration mechanism of CO₂ in the coal seam. In the field scale sequestration, pressure of CO₂ is super-critical. The adsorption volume of CO₂ in coal in that condition is not yet clarified. This adsorption volume is very important for the prediction of sequestrable CO₂ volume.<BR>The present activities on this subject in the United States, Canada, Australia, Netherlands and Japan were reported. For the further studies, the international cooperative R&Ds are necessary. Items for the further R&Ds are summarized.

著者

木原 英昭

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.106, no.5, pp.233-236, 1990-05-25 (Released:2011-01-27)

著者

柳瀬 正明

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.108, no.9, pp.644-646, 1992-09-25 (Released:2011-01-27)

著者

西岡 紘一 境 収 合沢 勝悦

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.5, pp.241-246, 1990-05-25 (Released:2011-01-27)

著者

牧 孝司

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.108, no.9, pp.638-640, 1992-09-25 (Released:2011-01-27)

著者

黒川 晴正 家守 伸正

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.2, pp.55-60, 2003-02-25

被引用文献数

1 3

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Oxygen probes were applied to a PS converter in copper-making operation, and the oxygen pressures of white metal and blister copper in the converter were measured through the converter's mouth and through a tuyere, respectively. Based on the obtained results, the following reaction mechanism has been deduced.<BR>(1) The copper-making stage of a PS converter may be classified into three stages, i.e. the early substage where the tuyeres are completely in white metal, the intermediate substage where both phases of white metal and blister copper coexist in the converter and the tuyeres are in the blister copper, and the final substage where the white metal has disappeared from the converter.<BR>(2) In the early stage, direct oxidation of white metal by oxygen gas contained in the reaction air progresses in the vicinity of the tuyeres.<BR>Cu₂S(<i>l</i>) + O₂(<i>g</i>) = 2Cu(<i>l</i>) + SO₂(<i>g</i>) …………… (1)<BR>(3) In the intermediate substage, the following three reactions proceed near the tuyeres, at the interface of blister copper and white metal phases, and in the bulk of the blister copper, respectively.<BR>O₂(<i>g</i>) = 2<u>O</u>(<i>l</i>) …………… (2)<BR>Cu₂S(<i>l</i>) = 2Cu(<i>l</i>) + <u>S</u>(<i>l</i>) …………… (3)<BR><u>S</u>(<i>l</i>) + 2<u>O</u>(<i>l</i>) = SO₂(<i>g</i>) …………… (4)<BR>Here the most important factor is that reaction(4) progresses under the condition of <i>P</i>_SO₂=1atm. It is not dependent on how high the SO₂ pressure of the waste gas from the converter is. Because the condense phases, i.e. the white metal and blister copper phases, are not in equilibrium with the gas phase.<BR>(4) In the final substage, reactions(2) and (4) only proceed because the white metal is no longer in the converter. Some of the blister copper can be excessively oxidized to the extent that Cu₂O(<i>s</i>) is formed according to equation(5). However the final degree of oxidation of the whole blister copper does not reach this level.<BR>2Cu(<i>l</i>) + 1 / 2 O₂(<i>g</i>) = Cu₂O(<i>s</i>) …………… (5)

著者

古賀 誠 島田 英樹 松井 紀久男

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.118, no.1, pp.29-35, 2002-01-25

被引用文献数

4 7

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A bleeding examination and a flow characteristic examination of grout materials were performed to understand the fundamental characteristic of grout materials. Moreover, an injection experiment of grout materials which used a decomposed granite was conducted to understand the applicability of the analysis technique which introduced filtration theory. The results are as follows:<BR>1) When cement water ratio is large, a bleeding speed becomes slow, but the bleeding ratio becomes small.<BR>2) Plastic viscosity and yield stress become large with increase of cement water ratio. Particularly, plastic viscosity change greatly on <i>C</i> / <i>W</i> = 1 / 1.6. And as compared with yield stress, it is larger about influence on the discharge.<BR>3) Where a cement water ratio does not exceed <i>C</i> / <i>W</i> = 1 / 5, the clogging of the voids was done by a suspension custody. And where <i>C</i> / <i>W</i> = 1 / 3.5, that was done by a surface filter layer.<BR>4) The plastic viscosity measured using Brookfield viscometer is a result when some cement particles aggregate, and shows big value as compared with the theoretical relative viscosity.<BR>5) The result of injection analysis using the theoretical relative viscosity assumed that the cement particle is distributing completely is well as an experiment result in agreement. In the grout materials which flow the inside of the voids, it cleared that plastic viscosity follows the theoretical relative viscosity which the cement particles distributed.