Pub Date : 2017-01-01DOI: 10.2473/JOURNALOFMMIJ.133.207
Kazuharu Sasaki, Shinsuke Murakami
{"title":"Understanding the Strategies of Mining Giants by Modern Portfolio Theory","authors":"Kazuharu Sasaki, Shinsuke Murakami","doi":"10.2473/JOURNALOFMMIJ.133.207","DOIUrl":"https://doi.org/10.2473/JOURNALOFMMIJ.133.207","url":null,"abstract":"","PeriodicalId":21719,"journal":{"name":"Shigen-to-sozai","volume":"11 1","pages":"207-213"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87065677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.2473/JOURNALOFMMIJ.133.165
Koudai Tokushige, K. Mori, S. Oue, H. Matsushima, Kazunari Suzuki, Hiroaki Nakano
Cu electrolysis was performed using low-grade copper anode with purity 78.7 mass% at a anode current density of 200 A ・ m -2 in an unagitated sulfate solution containing 0.596 mol ・ dm -3 of Ni 2+ ions as impurity at 60 ℃ , and the structure of anode slime before and after passivation was analyzed. The highly-concentrated Sb, Pb and Ag were dispersed in copper anode before electrolysis. The passivation occurred at short time of 17.7 hours in the case of low-grade copper anode, and it occurred at shorter time of 11.4 hours in the solution containing Ni 2+ ions as impurity. At normal dissolution of copper anode, copper parent phase dissolved in the form of dendrite and the framework of anode slime was composed of remained Cu-Ni-Sb-Sn-As compound. Cu 2 S and single phase of Ag and Pb were observed around this framework. At passivation, Cu, Ni and Sn dissolved from the slime framework composed of Cu-Ni-Sb-Sn-As compound, resulting in formation of Sb condensed phase. These Cu-Ni-Sb-Sn-As compound, Sb condensed phase, Cu 2 S compound around the slime framework, Ag and needle-shaped PbO dotted in the whole slime suppressed the diffusion of Cu 2+ ions, as a result, CuSO 4 was formed at interface between the slime and copper substrate. The passivation occurred at slime thickness of approximately 500 μ m in Ni 2+ -free solution, while it occurred at slime thickness of approximately 300 μ m in solution containing Ni 2+ ions. This indicates that the passivation do not depend on only the thickness of slime. The thickness of CuSO 4 formed at passivation in Ni 2+ -free solution was almost identical with that from the solution containing Ni 2+ ions. In solution containing Ni 2+ ions, the passivation occurred at less thickness of slime, showing that CuSO 4 is easy to be formed in the vicinity of copper substrate due to decrease in solubility of CuSO 4 and diffusion coefficient of Cu 2+ ions.
{"title":"Passivation Behaviour of Anode in Copper Electrorefining Using Recycled Low-grade Copper Anode","authors":"Koudai Tokushige, K. Mori, S. Oue, H. Matsushima, Kazunari Suzuki, Hiroaki Nakano","doi":"10.2473/JOURNALOFMMIJ.133.165","DOIUrl":"https://doi.org/10.2473/JOURNALOFMMIJ.133.165","url":null,"abstract":"Cu electrolysis was performed using low-grade copper anode with purity 78.7 mass% at a anode current density of 200 A ・ m -2 in an unagitated sulfate solution containing 0.596 mol ・ dm -3 of Ni 2+ ions as impurity at 60 ℃ , and the structure of anode slime before and after passivation was analyzed. The highly-concentrated Sb, Pb and Ag were dispersed in copper anode before electrolysis. The passivation occurred at short time of 17.7 hours in the case of low-grade copper anode, and it occurred at shorter time of 11.4 hours in the solution containing Ni 2+ ions as impurity. At normal dissolution of copper anode, copper parent phase dissolved in the form of dendrite and the framework of anode slime was composed of remained Cu-Ni-Sb-Sn-As compound. Cu 2 S and single phase of Ag and Pb were observed around this framework. At passivation, Cu, Ni and Sn dissolved from the slime framework composed of Cu-Ni-Sb-Sn-As compound, resulting in formation of Sb condensed phase. These Cu-Ni-Sb-Sn-As compound, Sb condensed phase, Cu 2 S compound around the slime framework, Ag and needle-shaped PbO dotted in the whole slime suppressed the diffusion of Cu 2+ ions, as a result, CuSO 4 was formed at interface between the slime and copper substrate. The passivation occurred at slime thickness of approximately 500 μ m in Ni 2+ -free solution, while it occurred at slime thickness of approximately 300 μ m in solution containing Ni 2+ ions. This indicates that the passivation do not depend on only the thickness of slime. The thickness of CuSO 4 formed at passivation in Ni 2+ -free solution was almost identical with that from the solution containing Ni 2+ ions. In solution containing Ni 2+ ions, the passivation occurred at less thickness of slime, showing that CuSO 4 is easy to be formed in the vicinity of copper substrate due to decrease in solubility of CuSO 4 and diffusion coefficient of Cu 2+ ions.","PeriodicalId":21719,"journal":{"name":"Shigen-to-sozai","volume":"132 1","pages":"165-172"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85339738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.2473/JOURNALOFMMIJ.133.107
M. Kataoka, Tianshu Bao, K. Hashiba, K. Fukui
{"title":"Effect of Water Saturation on Stress-Strain Curve of Rocks in Uniaxial Compression","authors":"M. Kataoka, Tianshu Bao, K. Hashiba, K. Fukui","doi":"10.2473/JOURNALOFMMIJ.133.107","DOIUrl":"https://doi.org/10.2473/JOURNALOFMMIJ.133.107","url":null,"abstract":"","PeriodicalId":21719,"journal":{"name":"Shigen-to-sozai","volume":"128 1","pages":"107-115"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85121456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.2473/journalofmmij.133.151
Daiki Nakamura, Hidekazu Yamamoto, Yuto Tanakadate, S. Hanehara, T. Oyamada
{"title":"Effect of Fine Sand of Blast-Furnace Slag on Freeze and Thaw Resistance, Sulfate Resistance and Sulfuric Acid Resistance of Mortar","authors":"Daiki Nakamura, Hidekazu Yamamoto, Yuto Tanakadate, S. Hanehara, T. Oyamada","doi":"10.2473/journalofmmij.133.151","DOIUrl":"https://doi.org/10.2473/journalofmmij.133.151","url":null,"abstract":"","PeriodicalId":21719,"journal":{"name":"Shigen-to-sozai","volume":"64 1","pages":"151-156"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81123762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.2473/JOURNALOFMMIJ.133.98
Satoshi Hirooka, T. Yamaguchi, Toshifumi Watabe, Nobuya Yamamoto, Kunihiro Jodai, N. Yasuda, K. Tsukada, K. Koike, T. Asakura
{"title":"Mechanical Stability Evaluation of Water-sealed Type Underground Rock Cavern Using Tilt Response to Gas Pressure Change in Cavern","authors":"Satoshi Hirooka, T. Yamaguchi, Toshifumi Watabe, Nobuya Yamamoto, Kunihiro Jodai, N. Yasuda, K. Tsukada, K. Koike, T. Asakura","doi":"10.2473/JOURNALOFMMIJ.133.98","DOIUrl":"https://doi.org/10.2473/JOURNALOFMMIJ.133.98","url":null,"abstract":"","PeriodicalId":21719,"journal":{"name":"Shigen-to-sozai","volume":"13 1","pages":"98-106"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81900557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.2473/JOURNALOFMMIJ.133.12
Masayo Kakumoto, Y. Sakamoto, K. Miyazaki, N. Tenma, K. Aoki, Akira Takiguchi, T. Ishibashi, J. Mori
{"title":"Numerical Study on Stratum Deformation during Dissociation Process of Methane Hydrate by Depressurization: – Prediction of Stratum Deformation Behavior in Methane Hydrate Reservoir, Part1 –@@@− メタンハイドレート貯留層の地層変形挙動予測に関する研究 (第1報) −","authors":"Masayo Kakumoto, Y. Sakamoto, K. Miyazaki, N. Tenma, K. Aoki, Akira Takiguchi, T. Ishibashi, J. Mori","doi":"10.2473/JOURNALOFMMIJ.133.12","DOIUrl":"https://doi.org/10.2473/JOURNALOFMMIJ.133.12","url":null,"abstract":"","PeriodicalId":21719,"journal":{"name":"Shigen-to-sozai","volume":"87 1","pages":"12-24"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74487800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.2473/journalofmmij.133.116
Yuki Seino, K. Kanie, A. Muramatsu
{"title":"Hydrothermal Synthesis of Ce-doped BaZrO 3 Fine Particles and Their Three-way Catalytic Performance for Exhaust Gas Purification","authors":"Yuki Seino, K. Kanie, A. Muramatsu","doi":"10.2473/journalofmmij.133.116","DOIUrl":"https://doi.org/10.2473/journalofmmij.133.116","url":null,"abstract":"","PeriodicalId":21719,"journal":{"name":"Shigen-to-sozai","volume":"17 1","pages":"116-122"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79450033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.2473/JOURNALOFMMIJ.133.214
M. Hanano
{"title":"Success of the First Commercial Scale Geothermal Power Development in Japan; Matsukawa Geothermal Power Station","authors":"M. Hanano","doi":"10.2473/JOURNALOFMMIJ.133.214","DOIUrl":"https://doi.org/10.2473/JOURNALOFMMIJ.133.214","url":null,"abstract":"","PeriodicalId":21719,"journal":{"name":"Shigen-to-sozai","volume":"84 1","pages":"214-222"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83835277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.2473/JOURNALOFMMIJ.133.270
T. Shinkawa, T. Chida, So Furukawa, Taro Kamiya
{"title":"Investigation of Liquid Channeling in Heap by Tracer Test","authors":"T. Shinkawa, T. Chida, So Furukawa, Taro Kamiya","doi":"10.2473/JOURNALOFMMIJ.133.270","DOIUrl":"https://doi.org/10.2473/JOURNALOFMMIJ.133.270","url":null,"abstract":"","PeriodicalId":21719,"journal":{"name":"Shigen-to-sozai","volume":"69 1","pages":"270-276"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84449523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.2473/journalofmmij.133.34
Y. Nishimatsu
{"title":"Principle and Method of the Research Work in the Field of Engineering Science","authors":"Y. Nishimatsu","doi":"10.2473/journalofmmij.133.34","DOIUrl":"https://doi.org/10.2473/journalofmmij.133.34","url":null,"abstract":"","PeriodicalId":21719,"journal":{"name":"Shigen-to-sozai","volume":"70 1","pages":"34-44"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77603177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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