Journal of Mmij最新文献_第5页

Classification of Arsenic Bearing Minerals Using Hyperspectral Imaging and Deep Learning for Mineral Processing 基于高光谱成像和深度学习的含砷矿物分类研究

Journal of Mmij Pub Date : 2021-01-31 DOI: 10.2473/JOURNALOFMMIJ.137.1

Natsuo Okada, Yohei Maekawa, Narihiro Owada, Kazutoshi Haga, A. Shibayama, Y. Kawamura

{"title":"Classification of Arsenic Bearing Minerals Using Hyperspectral Imaging and Deep Learning for Mineral Processing","authors":"Natsuo Okada, Yohei Maekawa, Narihiro Owada, Kazutoshi Haga, A. Shibayama, Y. Kawamura","doi":"10.2473/JOURNALOFMMIJ.137.1","DOIUrl":"https://doi.org/10.2473/JOURNALOFMMIJ.137.1","url":null,"abstract":"Currently, there have been issues concerning the depletion and scarcity of mineral resources. This is mostly due to the excavation of high grade minerals having already occurred years and years ago, hence forcing the mining industry to opt for the production and optimization of lower grade minerals. This however brings about a plethora of problems, many of which economic, stemming from the puriﬁcation of those low grade minerals in various stages required for mineral processing. In order to reduce costs and aid in the optimization of the mining stream, this study, introduces an automatic mineral identiﬁcation system which combines the predictive abilities of deep learning with the excellent resolution of hyperspectral imaging, for pre-stage of mineral processing. These technologies were used to identify and classify high grade arsenic (As) bearing minerals from their low grade mineral counterparts non-destructively. Most of this ability to perform such tasks comes from the highly versatile machine learning model which employs deep learning as a means to classify minerals for mineral processing. Experimental results supported this statement as the model was able to achieve an over 90% accuracy in the prediction of As-bearing minerals, hence, one could conclude that this system has the potential to be employed in the mining industry as it achieves modern day system requirements such as high accuracy, speed, economic, user-friendly and automatic mineral identiﬁcation.","PeriodicalId":16502,"journal":{"name":"Journal of Mmij","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85717182","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}

引用次数: 2

Prediction of Pressure Response at A Monitoring well in Initial Injection Stages of CO2 Geological Storage into A Deep Aquifers 深埋层CO2地质储层注入初期监测井压力响应预测

Journal of Mmij Pub Date : 2021-01-31 DOI: 10.2473/JOURNALOFMMIJ.137.17

Q. Sun, K. Sasaki, Y. Sugai, R. Nguele

引用次数: 0

Separation of Ti from Bi-Ti alloy by Solid-Liquid Separation at High Temperature and Vacuum Distillation 高温固液分离真空蒸馏法从双钛合金中分离Ti

Journal of Mmij Pub Date : 2021-01-31 DOI: 10.2473/JOURNALOFMMIJ.137.10

Kazuhiro Kumamoto, Kunitomo Yoshinobu, A. Kishimoto, K. Okamoto, Akiko Kuramitsu, T. Uda

{"title":"Separation of Ti from Bi-Ti alloy by Solid-Liquid Separation at High Temperature and Vacuum Distillation","authors":"Kazuhiro Kumamoto, Kunitomo Yoshinobu, A. Kishimoto, K. Okamoto, Akiko Kuramitsu, T. Uda","doi":"10.2473/JOURNALOFMMIJ.137.10","DOIUrl":"https://doi.org/10.2473/JOURNALOFMMIJ.137.10","url":null,"abstract":"A new Ti smelting process via . Bi–Ti alloy is proposed. This process comprises reduction of TiCl 4 to Bi–10 mol%Ti alloy by Bi–Mg alloy, precipitation of Ti-rich compound from the alloy, and vacuum distillation. In this study, we investigated the precipitation and distillation processes. In the precipitation process, the Bi–10 mol%Ti liquid alloy is cooled from 900 ℃ to 500 ℃ to precipitate Bi 9 Ti 8 in the liquid alloy. The Bi 9 Ti 8 is recovered by a two-step separation method: recovery of mixture of Bi 9 Ti 8 and Bi and further removal of Bi by centrifugal ﬁltration. We demonstrated the recovery of mixture. As the results, Ti concentration in the mixture was 31 mol%, and the Ti yield was about 45 %. Because the remained liquid alloy after the recovery contains a large amount of Bi 9 Ti 8 , it is required to reuse the remained alloy in the precipitation process. Assuming the reuse of remained alloy, the material flow of the process was designed based on the experimental results. The centrifugal ﬁltration of the mixture of Bi 9 Ti 8 and Bi was also carried out at 500 ℃ . By the centrifugal ﬁltration at 50 G, alloys with a size of 1.5 mm were obtained, and the Ti concentration in the alloys was increased from 31 mol% to 40 mol%. Vacuum distillation of alloy powder and ingot was demonstrated. The distillation rate was enhanced when using the powder than when using alloy ingot as a starting material.","PeriodicalId":16502,"journal":{"name":"Journal of Mmij","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77209122","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}

引用次数: 0

Retraction：Development of a New Recycling Process for Neodymium Permanent Magnet Using B2O3 Flux 缩回:B2O3助熔剂回收钕永磁体新工艺的开发

Journal of Mmij Pub Date : 2021-01-01 DOI: 10.2473/journalofmmij.137.45

Hidehiro Sekimoto, T. Kubo, K. Yamaguchi,

引用次数: 0

The Effects of CSR in Resource-rich, Developing Countries 企业社会责任在资源丰富的发展中国家的影响

Journal of Mmij Pub Date : 2020-12-31 DOI: 10.2473/journalofmmij.136.159

Shokichi Sakata

引用次数: 0

Effects of Heterogeneous Seal Layer Property on The Long-Term Behaviour of CO2 Injected into Deep Multilayer Systems 非均质密封层性质对深层多层体系注入CO2长期行为的影响

Journal of Mmij Pub Date : 2020-12-31 DOI: 10.2473/journalofmmij.136.140

Y. Kano, T. Ishido, S. Nakao

引用次数: 0

Quantitative Modeling for Continuous Treatment of Zinc Contained Acid Mine Drainage Using Column Filling Leaf Mold 含锌酸性矿井污水连续处理的柱式充填叶模定量建模

Journal of Mmij Pub Date : 2020-12-31 DOI: 10.2473/journalofmmij.136.151

Tatsuya Kato, Ryouko Fukushima, Koichi Sato, Saburo Yamagata, C. Tokoro

引用次数: 0

Changes of Coal Strength under Hydrostatic Pressure Caused by CO2 and N2 Injection CO2和N2注入对静水压力下煤强度的影响

Journal of Mmij Pub Date : 2020-11-30 DOI: 10.2473/journalofmmij.136.134

T. Takehara, Y. Oikawa, T. Fujii, K. Miyazaki

引用次数: 0

Social Acceptance of CCS CCS的社会接受度

Journal of Mmij Pub Date : 2020-11-30 DOI: 10.2473/journalofmmij.136.127

Atsuko Tanaka

引用次数: 0

Measurement of Threshold Capillary Pressure Using Data of CO2 Injection under Triaxial Compression Test on Mudstone 利用泥岩三轴压缩试验CO2注入数据测量毛细阈值压力

Journal of Mmij Pub Date : 2020-10-31 DOI: 10.2473/journalofmmij.136.110

Y. Oikawa, T. Takehara, X. Lei, H. Fukazawa, Tsutomu Yamaguchi

{"title":"Measurement of Threshold Capillary Pressure Using Data of CO2 Injection under Triaxial Compression Test on Mudstone","authors":"Y. Oikawa, T. Takehara, X. Lei, H. Fukazawa, Tsutomu Yamaguchi","doi":"10.2473/journalofmmij.136.110","DOIUrl":"https://doi.org/10.2473/journalofmmij.136.110","url":null,"abstract":"Elucidating the sealing capacity of caprock is very important because CO 2 sequestered in deep aquifers can remain there for several hundred years in the CO 2 sequestration. Threshold capillary pressure is a key property affecting sealing capacity, and therefore, the ability to measure the threshold pressure of a target rock conveniently is highly sought after. In this study, data collected during the CO 2 injection process in triaxial compression tests of mudstone supposed to be a caprock were used to measure threshold pressure via the dynamic method. These triaxial tests were conducted to study the mechanical properties of mudstone below depths of 1000 m. The threshold pressure for 23 out of 26 test samples was successfully measured. Measured values ranged from 0.54 to 1.57 MPa, which was within a reasonable range compared to the results reported by three other studies that used similar mudstone specimens. A small amount of shrinkage induced by a pore pressure decrease, which was caused by a threshold pressure, was observed in the experiment. The threshold pressure showed a positive correlation with the shrinkage, implying that this pressure might be estimated from the shrinkage. Thus, a volumetric elastic constant was calculated from the shrinkage assuming that the decrease in mean pore pressure was half of the threshold pressure. The mean volumetric elastic constant was 0.92 GPa, which was about 40% lower than that of the rocks from which the test samples were obtained. These results indicate that the shrinkage value cannot be directly used to estimate the threshold pressure, and that a correction of this shrinkage value is necessary.","PeriodicalId":16502,"journal":{"name":"Journal of Mmij","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90353506","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}

引用次数: 0