著者

佐々木 久郎 スサント ベリー アンガラ フェリアン ヨセフサザビィ アミン 菅井 裕一 川村 太郎 児玉 孝雄 松嶋 慶祐

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:18816118)

巻号頁・発行日

vol.131, no.8, pp.503-508, 2015

被引用文献数

2

---

The development and advancement of new technologies have been considered for carbon fixation and its effective utilization as being indispensable for the achievement of greenhouse gas emissions reduction targets without adversely impacting economic growth in the world. Among such technologies, the one considered to present the greatest potential in terms of both of feasibility and CO₂ reduction, as well as offering a relatively low cost burden, is CO₂ capture, usage and geological storage (CCUS). The costs of CO₂ recovery present a barrier to carry the CCS and CCUS project. Large-scale project models for carbon sequestration, recovery and underground storage that involve the construction of long-distance pipelines have been either implemented or planned in North America and Australia, etc., but such projects are not well matched to the land conditions of Japan. The development of Japanese-style CO₂ sequestration, recovery and underground storage technologies is required that ensures linkage in a compact and high economical way among local area-based CO₂ recovery, storage or fixation processes and also energy supply. In this article, the concept<tt>"</tt> Low-Carbon Smart Cities<tt>"</tt> have been proposed with some technical challenges that can be solved by research developments with including environmental monitoring. This concept is targeted for areas with relatively high population density and where land use constraints are in place. By applying the resulting model to the situation in Southeast Asian countries, which have similar land conditions and also possess coal resources, the aim is to combine and integrate the local environment with the provision of carbon-free energy and realize CO₂ reduction with greater economic efficiency.

著者

Dagvadorj Otgonjargal 中村大 川口貴之 渡邊達也 川尻峻三 宗岡寿美

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.137, no.7, pp.69-78, 2021-07-31 (Released:2021-07-31)

参考文献数

16

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In this study,field surveys were carried out at the damaged area of slope stabilization works,where the main cause was presumed to be the frost heaving of the rock mass.Field measurements of the freezing depth and the amount of frost heave were also conducted.In addition, the effectiveness of the slope stabilization work with the frost heave measures was verified based on the investigation results.The findings are summarized as follows. (1) From the results of the field survey and the field measurements,it was found that even if frost heaving occurred in the extreme surface layer, the rock mass would be degraded and the slope stabilization work would be affected.(2)From the results of the frost heaving tests, it is clear that the frost susceptibility of the damaged rock slope is extremely high, and there was wide agreement between the results of the frost heaving tests and the results of determining the frost susceptibility of the damaged rock slope using a simple strength test method. Therefore, the validity of the simple method proposed by Nakamura et al. for determining the frost susceptibility of rocks by using the strength test was also verified. (3)It was confirmed that both the gabion and the continuous fiber reinforced soil work were effective in preventing the freezing front from advancing into the rock mass.The method of covering the rock slope with non-frost susceptible material to prevent the penetration of the freezing front was found to be effective as a countermeasure against frost heaving.

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

藤井 響也 武部 博倫

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.137, no.6, pp.63-68, 2021-06-30 (Released:2021-06-30)

参考文献数

19

被引用文献数

3

---

Mixtures of copper concentrate and silica sand with various CuFeS2/FeS2 ratios and with 5 mg in weight were dropped from the top side of the silica tube filled with O2 gas and were reacted at 470℃. The Fe/SiO2 mass ratio of the mixtures was fixed at 1.1 as a typical composition of flash smelting. The samples exhibited the white light emission expecting the arrival temperature of > 1500℃ due to the ignition reaction of sulfide minerals. Reaction products were evaluated by using scanning electron micrograph-energy dispersive X-ray spectrometry (SEM-EDS) analysis. In addition to un-reacted oxide and sulfide particles, matte-slag-mineral-magnetite coexisted particles were recognized in microstructure observation. The products supported heterogeneous reactions occurring in the copper concentrate burner. The effect of FeS2 concentration on copper concentration in matte phase and magnetite phase fraction in slag phase was discussed.

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

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:03694194)

巻号頁・発行日

vol.44, no.513, pp.82, 1928

著者

杉本 栄佑 幸塚 善作

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:03694194)

巻号頁・発行日

vol.104, no.1200, pp.89-95, 1988

被引用文献数

2

---

The present study was done for the purpose of finding any available solid reference electrode for SO<SUB>2</SUB>sensor employingbeta alumina solid electrolyte. In this paper, we tried a few experiments for this sensor using two solid reference electrode, (&beta;+&beta;')-alumina and (&alpha;+&beta;)-alumina.<BR>The cells used were as follows: Pt, (&beta;+&beta;')-alumina in air/&beta;'-alumina/Na<SUB>2</SUB>SO<SUB>4</SUB>/SO<SUB>2</SUB>+O<SUB>2</SUB>+SO<SUB>3</SUB>, Pt (1) Pt, (&alpha;+&beta;)-alumina in air/&beta;-alumina/Na<SUB>2</SUB>SO<SUB>4</SUB>/SO<SUB>2</SUB>+O<SUB>2</SUB>+SO<SUB>3</SUB>, Pt (1)(11) From the present experiments, the following conclusions were obtained.<BR>1) The constant sodium activities in these solid reference electrodes were maintained for a long duration of the experiment.<BR>2) For both cells, good straight lines were obtained between e.m.f.'s and log Pso2 within the temperature ranges from 933 to 1230 K in the cell (1) and from 932 to 1278 K in the cell (11). Especially, in the (&beta;+&beta;')-alumina solid reference electrode, it was shown that the cell using this electrode could be employed to determine concentrations up to a few ppm of SO<SUB>2</SUB> gases at temperatures of 932 to about 1100 K. Consequently, this (&beta;+&beta;')-alumina mixture is recommended for the solid reference electrode ofSO<SUB>2</SUB> sensor employing&beta;'-alumina solid electrolyte.<BR>3) From e.m.f.'s of these cells, the activities of Na<SUB>2</SUB>O in &beta;-Al<SUB>2</SUB>O<SUB>3</SUB>+&beta;'-Al<SUB>2</SUB>O<SUB>3</SUB>and &alpha;-Al<SUB>2</SUB>O<SUB>3</SUB>+&beta;-Al<SUB>2</SUB>O<SUB>3</SUB>coexistences were respectively calculated by considering thermochemical data and compared with the others.

著者

岡部 恭

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.100, no.1160, pp.993-997, 1984-10-25 (Released:2011-07-13)

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Musashi-shiraiwa mine is a underground mining limestone mine which is located at naguri-mura, western part of Saitama prefecture.Annual production of the mine is 170, 000 tons of limestone are and mining method of it is sublevel stopping.This paper describes on the following points(1) Outline of the mine 1) location, 2) development, 3) geology and mineral deposits, 4) motive and changes of adoption for underground mining method(2) Opening 1) pre-surveying, 2) plan of opening, 3) norm for structure of are brock, 4) operation of drifting(3) Mining methods and operation(4) Transportation(5) Ventilation(6) Transmission

著者

中尾 智三郎

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.72, no.822, pp.927-932, 1956-12-25 (Released:2011-07-13)

参考文献数

5

---

In this paper, some problems such as roasting, crushing, leaching of wolframite and the precipitation, of leached solution are treated. Some fundamental methods for the treating of scheelite are also presented. Though the efficiency of elimination of S and As is very important in the roasting process, it is also necessary to think about the relations between the roasting condition and pulverizing or solubility of elements in the ore. To the mechanism of crushing of wolframite, fundamental theory can he applied, but at the technical case mass effects must be discussed. The leaching efficiency of are depends mostly upon the grain size of are and the quantities of leaching reagents. Impurities in the are are also leached, and then crystallize out, but each impurity has essential beharior in such process. Scheelite can be refined by several technical methods. Decomposition with mineral acid is a ordinay method, but fusion or leaching with soda ash are very interesting methods.

著者

張 春偉 高 謙 胡 映学 袁 正一 末包 哲也 肖 鋒

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.137, no.5, pp.56-62, 2021-05-31 (Released:2021-05-27)

参考文献数

30

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多孔質中の非混和二相流に関する現象はCO2地下貯留や原油増進回収,土壌修復など様々な工業的,自然科学的応用を有している。ハイネスジャンプや毛管圧浸透などの空隙スケールの現象は置換プロセスに大きな影響を与えることが知られている。ハイネスジャンプは周囲の空隙内におけるメニスカスの再配置を伴いながら二相界面が急激に移動する現象である。対して,毛管圧浸透は濡れにくい相が大きな空隙を平坦な界面を維持しながら選択的に浸透する現象である。本研究では,様々なスロート径を有するランダムな構造を有する多孔質における排水過程の数値シミュレーションを行った。ハイネスジャンプと毛管圧浸透は飽和率の変化に影響を与える。ハイネスジャンプでは飽和率が変わらず先端界面の移動が生じる。一方,毛管圧浸透では先端位置がほとんど変化せず,飽和率の上昇が発生する。さらに,キャピラリー数と粘性比の影響を調べた。高いキャピラリー数と高い粘性比が,CO2などの濡れにくい相のキャピラリートラップには有効である。エネルギー収支を求めた結果,外からなされた仕事の48%がこれらの不可逆過程で散逸していることが分かった。

著者

荒牧 憲隆 村上 拓馬

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.137, no.5, pp.51-55, 2021-05-31 (Released:2021-05-27)

参考文献数

9

被引用文献数

1

---

We proposed a new gasification method that converts unused organic matter in sedimentary rocks to bio methane gas through the use of microorganisms, known as Subsurface Cultivation and Gasification (SCG). Our approach uses hydrogen peroxide (H2O2) to decompose organic matter rapidly into usable substrates for methanogens. We previously reported that H2O2 would be useful for effective SCG at lignite, and conversion of organic matter from lignite into biogenic methane with the help of microorganisms is expected to be highly profitable. However, changes of physical properties of the sedimentary rock seem to occur due to decomposition of sedimentary rock in the biogenic methane conversion with the SCG method. In this study, immersion tests using a H2O2 solution were performed on two types of lignite to estimate the quantity of low-molecular-weight organic acids and the producing potential for biogenic methane gas. In addition, mass loss rate of lignite with oxidative decomposition of lignite was examined. The mass loss of lignite with the oxidative decomposition increased with increasing the amount of substance in H2O2. Furthermore, it was confirmed that the loss rate depends on the lignite. The biomethane deposits might become mechanically unstable during promoting decomposition of organic matter of lignite seams, if lignite has the greater resource potential for biomethane.

著者

部坂 恒夫

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.954-957, 1968-07-25 (Released:2011-07-13)

著者

尾﨑 佳智 岡部 徹 香川 豊

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.130, no.4, pp.93-103, 2014-04-01 (Released:2015-04-01)

参考文献数

22

被引用文献数

3 10

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Nickel is widely used because of its excellent physical and chemical properties. Stainless steel and super alloys for turbine blades are representative nickel-based alloys. It is noteworthy that nickel has recently been adopted for use as a component of electronic devices such as capacitors and secondary batteries. Nickel is indispensable in our day-to-day life, and it is widely used in basic to advanced applications. A future shortage of nickel is anticipated because the demand for this metal in developing countries in places like BRICs and Southeast Asia is rapidly increasing along with their economic growth. There are two kinds of nickel ore: sulfide ore and oxide ore. Sulfide ore is mainly used because of its ease of concentration and smelting. Oxide ore, which is not as useful at this stage, should be considered as a potential new source of nickel for the future since it contains 70% of nickel resources. This paper reviews the current status of the resources and supply–demand of nickel as well as its metallurgical processing. An update and outlook on hydrometallurgical process technologies for nickel laterite ore, especially the HPAL process, which will be widely applied because of its high efficiency, are introduced.

著者

徂徠 正夫 後藤 宏樹 杉原 光彦 西 祐司 中尾 信典

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.137, no.4, pp.46-50, 2021-04-30 (Released:2021-04-28)

参考文献数

17

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Toward the implementation of geological CO2 storage, cost reduction of CO2 monitoring during and after injection into targeted reservoirs is the key issue. The continuous gravity measurement using a superconducting gravimeter, which has been applied to the demonstration project site in Japan ahead of the rest of the world, has a potential to resolve the issue from the viewpoint of a complement to the high-cost seismic survey. The concept is such that the continuous gravity measurement is substituted for constant monitoring and that the use of seismic survey could be limited only when any anomaly is detected. The comparison of the monitoring cost after the completion of CO2 injection indicated that applying gravity measurement can reduce costs by up to 15 to 50% of the seismic cost. The current detection limit of gravity change is around 1 μGal based on the application result in the coastal area in Japan. However, the time series analysis using pseudo gravity data suggested the possibility of anomaly detection even below the detection limit. Further improvement of analysis precision would lead not only to more rapid and more reliable anomaly detection but also to contribution to the cost reduction during the CO2 injection period.

著者

加瀬 薫

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.72, no.822, pp.915-918, 1956-12-25 (Released:2011-07-13)

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The operation at Sunamachi plant was commenced from 1944, and the output of the metallic tungsten was 7 t per month. The plant was severely destroyed by bombing in March, 1945, but it was reconstructed soon after the war. The present production of metallic tungsten is about 3.5-4.5t per month.The raw material is wolframite and tungsten in it is leached as paratungstic ammonia. The leached solution is thickened to crystallize out the parasalt, and the salt is reduced by the two steps of heating with hydrogen gas. At first it is reduced to blue oxide (W4O11) at the temperature of 410-450°C and then is reduced to metallic state at more higher temperature .

著者

正路 徹也 佐々木 望 金田 博彰 武内 寿久禰

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.96, no.1103, pp.1-6, 1980-01-25 (Released:2011-07-13)

参考文献数

19

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The high grade of cobalt characterizes the deposit of the Shimokawa copper mine which is one of the most famous bedded cupriferous pyrite deposits of Japan. Unfortunately, however, the cobalt has not been recovered, because the concentration of cobalt is difficult. In order to show the distribution of cobalt in the ore, the microscopic observation and the electron microprobe analysis have been carried out. The main ore minerals are pyrite, chalcopyrite, monoclinic pyrrhotite, sphalerite, cobalt pentlandite, and cobaltian mackinawite in the descending order of abundance. Among them, pyrite is the most important carrier of cobalt, and cobalt pentlandite is subordinate. The cobalt of the copper concentrate depends upon the small mingled grains (less than 20μm) of cobalt pentlandite which is closely associated with chalcopyrite. On the other hand, the pyrite concentrate owes its cobalt amount to cobalt-rich pyrite. On the basis of the texture of ore and the crystal form of pyrite, the mode of occurrence of pyrite is divided into seven types as shown in Figs. 1 (a)-(g). The R-type pyrite having a rounded form is the richest in cobalt among them, and contains a average cobalt concentration of 0.8 wt.%.These natures of ore suggest that the cobalt of the coppem concentmate may be recovered as a by-pmoduct of the copper smelting, and that the cobalt of the pyrite concentrate may be recovered as a cobalt concentrate consisting of R-type pyrite.

著者

竹田 修 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.137, no.3, pp.36-44, 2021-03-31 (Released:2021-03-27)

参考文献数

64

被引用文献数

4

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Scandium possesses unique physical and chemical properties. However, its applications are limited to special/minor fields because of its small production volume and high production cost. While the abundance of scandium in the Earth's crust is not scarce, there are no concentrated ore deposits that are commercially available. Historically, scandium was extracted as a byproduct of uranium and rare earth deposits, and smelted in a small scale. In this review, the characteristics and applications of scandium are briefly introduced. Further, the natural sources of scandium and its current resource developments are discussed. Recent technological developments in the hydrometallurgical process of nickel smelting and the resource potential of scandium from lateritic nickel deposits are also explored. With respect to the production of scandium metal, the development of reduction processes including the electrolytic and the metallothermic reactions is discussed. Finally, the reduction processes for the direct production of aluminum-scandium master alloys are also reviewed.

著者

廣瀬 亜夫

出版者

一般社団法人 資源・素材学会

雑誌

日本鑛業會誌 (ISSN:03694194)

巻号頁・発行日

vol.49, no.578, pp.510-520, 1933-06-22 (Released:2011-07-13)

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In this paper the author deals with the gold coins with special reference to the Japanese specification of the gold coinage.With detailed explanation the following items are treated on the gold coins:(1) the Japanese regulation of coinage, (2) history of the coinage institution, (3) production, (4) weight and grade, (5) course of coinage ration, (6) amelioration of irregular brittleness of gold bullion, (7) gold coins in olden times and (8) table of the gold coinage in countries of the world.

著者

佐藤 昌暉

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.946, pp.341-345, 1967-02-25 (Released:2011-07-13)