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Affiliation |
Graduate School of International Resource Sciences Department of Earth Resource Engineering and Environmental Science |
HAGA Kazutoshi
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Research Interests 【 display / non-display 】
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Recycle engineering
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Mineral separation engineering
Graduating School 【 display / non-display 】
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-2010.03
Akita University Faculty of Engineering and Resource Science Graduated
Graduate School 【 display / non-display 】
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-2013.03
Akita University Graduate School of Engineering and Resource Science Doctor's Course Completed
Campus Career 【 display / non-display 】
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2018.04-Now
Akita University Graduate School of International Resource Sciences Department of Earth Resource Engineering and Environmental Science Associate Professor
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2013.04-2018.03
Akita University Abolished organization Department of Materials-process Engineering and Applied Chemistry Environ Assistant Professor
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2011.10-2013.03
Akita University Venture Business Laboratory Specially-appointed Assistant Professor
Academic Society Affiliations 【 display / non-display 】
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2012.11-Now
Japan
The Rare Earth Society of Japan
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2010.04-Now
Japan
Resource Processing Society of Japan
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2008.04-Now
Japan
The Materials Enginnering for Resources of Japan
Research Areas 【 display / non-display 】
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Energy Engineering / Earth resource engineering, Energy sciences
Research Achievements 【 display / non-display 】
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Magnetic Separation and Leaching Study of Rare Earth Elements from Apatite-Iron Ore
Battsengel A., Batnasan A., Haga K., Watanabe Y., Shibayama A.
International Journal on the Society of Materials Engineering for Resources 23 ( 1 ) 88 - 92 2018.03 [Refereed]
Research paper (journal) Domestic Co-author
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Synthesis of pincer-type extractants for selective extraction of palladium from PGMs: An improved liquid-liquid extraction approach to current refining process
M. Rajivgandhi, M. Yamada, K. Haga, A. Shibayama
Scientific reports ( 7 ) 1 - 13 2017.08 [Refereed]
Research paper (journal) Domestic Co-author
パラジウムの選択抽出剤の創成を目的に、ピンサー型を基本構造とする4種類の抽出剤を合成し、その抽出能および脱離能を評価した。また、ジ-2-オクチルスルフィドやLIX-84Iなどの既存の抽出剤との比較検討を行った。合成した抽出剤のうち、側鎖に1,3-bis(octylthio) methyl benzeneを有する抽出剤は、高塩酸濃度条件でも高いパラジウム抽出能を維持したほか、硝酸条件でもその抽出能を維持することが明らかとなった。また抽出したパラジウムは塩酸とチオ尿素の混合溶液により脱離可能であることが究明された。
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Leaching and Kinetic study on pressure oxidation of chalcopyrite in H2SO4 solution and the effect of pyrite on the chalcopyrite leaching.
B. Han, B. Altansukh, K. Haga, Y. Takasaki, A. Shibayama
Journal of Sustainable Metallurgy 3 528 - 542 2017.06 [Refereed]
Research paper (journal) Domestic Co-author
高温高圧浸出における黄銅鉱の浸出挙動を速度論的に考察した。また黄鉄鉱存在下における黄銅鉱の浸出挙動も併せて調査した。黄銅鉱の浸出挙動はShrinking core modelに相関性があることが確認された。また、黄銅鉱を浸出する際、黄銅鉱量に対しモル比で20倍量の黄鉄鉱を添加することで、高い銅浸出率が得られることを明らかにした。
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Development of a Combined Flotation and High Pressure Leaching Process for Copper and Nickel Recovery from Mine Tailing
R. S. Magwaneng, B. Altansukh, K. Haga, A. Shibayama
Journal of Minerals and Materials Characterization and Engineering 5 ( 3 ) 118 - 131 2017.05 [Refereed]
Research paper (journal) Domestic Co-author
銅およびニッケルを含む選鉱尾鉱を対象に、浮選および高温高圧浸出を用いた選鉱フローの構築を試みた。浮選により、銅を浮鉱側に、ニッケルを沈鉱側に濃縮できた。銅を含む浮鉱に対し高温高圧浸出処理を行うことで、銅を溶液側に溶かし出せることが明らかとなった。
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Copper Recovery from Silicate-Containing Low-Grade Copper Ore Using Flotation Followed by High-Pressure Oxidative Leaching.
B. Han, B. Altansukh, K. Haga, Y. Takasaki, A. Shibayama
Resource Processing 64 3 - 14 2017.05 [Refereed]
Research paper (journal) Domestic Co-author
低品位銅鉱石の処理プロセスの開発を目的に、浮選を用いた銅濃縮と高温高圧浸出を用いた銅回収を試みた。浮選では、浮選条件を最適化することで、銅品位を約20倍まで濃縮できることを明らかにした。浮選より得られた銅濃縮物に対し、高温高圧浸出を施すことで、銅を約15 g/L含む濃縮溶液を得ることができた。
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Metal recovery from precious metal including acidic wastewater by cementation and precipitation-fusion process
A. Shibayama, K. Haga, H. Umeda
Chemical enginnering ( Kagaku Kogyo Sya ) 55 ( 10 ) 749 - 754 2010.10
Introduction and explanation (others) Domestic Co-author
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Selective Recovery of Palladium from PGM Containing Hydrochloric Acid Solution Using Thiocarbamoyl Substituted Adsorbents
Haga K., Sato S., Rajivgandhi M., Yamada M., Shibayama, A.
Proceedings of International Conference on Materials Engineering for Resources 2009 (ICMR2017) 196 - 200 2017.10 [Refereed]
Research paper (international conference proceedings) Domestic Co-author
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Investigation of Copper and Iron Recovery from Copper Ore by High Pressure Leaching
R. S. Magwaneng R. S., Haga K., Batnasan A., Shibayama A., Kosugi M., Kawarabuki R., Mitsuhashi K., Kawata M.
Proceedings of International Conference on Materials Engineering for Resources 2017 (ICMR2017) 213 - 216 2017.10 [Refereed]
Research paper (international conference proceedings) Domestic Co-author
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Magnetic Separation and Leaching Study of Rare Earth Elements from Apatite-Iron Ore
Battsengel A., Batnasan A., Haga K., Watanabe Y., Shibayama A.
Proceedings of International Conference on Materials Engineering for Resources 2017 (ICMR2017) 217 - 221 2017.10 [Refereed]
Research paper (international conference proceedings) Domestic Co-author
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Formation of Nano- and Micro- Gold Particles from Gold-Iodide Solution at pH 8-13
Batnasan A., Haga K., Shibayama A.
Proceedings of International Conference on Materials Engineering for Resources 2017 (ICMR2017) 236 - 239 2017.10 [Refereed]
Research paper (international conference proceedings) Domestic Co-author
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Recovery of tin from waste printed circuit board using physical and chemical separation
Harada S., Takeuchi M., Haga K., Kawamura S., Takasaki Y., Shibayama A.
Proceedings of MMIJ & EARTH2017(Sapporo) 2017.09
Research paper (international conference proceedings) Domestic Co-author
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Copper Recovery from Chalcopyrite Concentrate by Oxidative Roasting and Acid Leaching
TUMEN-ULZII Narangarav, GARNAAD Ariunaa, SILAM Alen, TUMENDELGER Azzaya, GUNCHIN Burmaa, SHIRCHINNAMJIL Nyamdelger, HAGA Kazutoshi, SHIBAYAMA Atsushi, BATNASAN Altansukh
Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｓｏｃｉｅｔｙ ｏｆ Ｍａｔｅｒｉａｌｓ Ｅｎｇｉｎｅｅｒｉｎｇ ｆｏｒ Ｒｅｓｏｕｒｃｅｓ ( 日本素材物性学会 ) 25 ( 1 ) 56 - 62 2022.04
<p>In this study, a combined process consisting of salt roasting and acid leaching was conducted to recover copper per sulphide concentrate with 43.5% of chalcopyrite. The chalcopyrite concentrate was roasted in the absence and the presence of potassium chloride (mass ratio of concentrate:KCl from 1:0.5 to 1:0.9) at various temperatures (400-600°C) and different roasting times (1-4 hours) under air atmosphere. The roasted concentrate was dissolved in sulphuric acid solution (60 g/L) with a solid-liquid ratio of 1:8 at an ambient temperature for 2 hours. The chalcopyrite concentrate, roasted samples, and leached residues were analyzed using atomic absorption spectrometry, UV-VIS spectrophotometer, and X-ray diffractometer. Thermogravimetry and differential thermal analyses were applied on the chalcopyrite concentrate and the concentrate with KCl up to 1000°C. Results showed that about 80% and 90% of chalcopyrite decomposed under the conditions with the copper concentrate:KCl ratio of 1:0.6, roasting time of 2 hours at 500°C and 550°C, respectively. The DTA-TG analyses revealed variant phase regions associated with chalcopyrite decomposition through the roasting. Copper dissolution with the sulphuric acid solution from the roasted concentrates was over 99.7% and 99.0% under the determined conditions. The thermodynamic stability of chalcopyrite with KCl was discussed by calculating Gibb's free energy.</p>
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Removal of Silicon, Aluminum and Phosphorus Impurities from Low-grade Iron Ore by Reverse Froth Flotation and Alkaline Roasting
BATNASAN Altansukh, SHIBAYAMA Atsushi, TAKEUCHI Hiroya, HAGA Kazutoshi, MIZUTANI Moritoshi, HIGUCHI Ken-ichi
Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｓｏｃｉｅｔｙ ｏｆ Ｍａｔｅｒｉａｌｓ Ｅｎｇｉｎｅｅｒｉｎｇ ｆｏｒ Ｒｅｓｏｕｒｃｅｓ ( 日本素材物性学会 ) 25 ( 1 ) 122 - 128 2022.04
<p>In this paper, the removal processes for silicon (Si), aluminum (Al) and phosphorus (P) impurities from low-grade iron ore, in which hematite (Fe<sub>2</sub>O<sub>3</sub>), goethite (FeO(OH)), and quartz (SiO<sub>2</sub>) are the main mineral constituents, have been presented. The reverse froth flotation process was applied to remove silicon and aluminum impurities from the iron ore using dodecyltrimethylammonium bromide (DTAB) and dodecylamine acetate (DAA) cationic collectors at a broad slurry pH ranging from 2 to 12. Whereas alkaline roasting followed by a water washing process was employed to remove phosphorus impurity from the iron ore under the various sodium hydroxide concentrations, different roasting temperatures, and prolonged varying times. Results showed that the maximum removal rate of SiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> achieved were 58.3% and 31.0% via reverse froth flotation using DTAB collector at pH 12, whereas 38.7% SiO<sub>2</sub> and 10.0% Al<sub>2</sub>O<sub>3</sub> with DAA collector. The level of total (SiO<sub>2</sub>+Al<sub>2</sub>O<sub>3</sub>) impurities in the tailing as iron ore product from the reverse flotation was reduced from 7.4 mass% to 4.4 mass% as the initial level. On the other hand, about 61% of phosphorus in the iron ore was removed by the combined alkaline roasting and water washing at the conditions optimized as 50 g/kg-ore NaOH at 300°C for 0.5 h. The grade of phosphorus impurity reached 0.04 mass% from 0.09 mass% (initial grade). Simultaneously, the iron grade and level of SiO<sub>2</sub>+Al<sub>2</sub>O<sub>3</sub> impurity in the iron ore product from reverse flotation of the low-grade iron ore with DTAB collector reached 60.0 mass% and 4.4 mass%, which are acceptable levels for ironmaking.</p>
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The Role of Lead in Suppressing Passivation of High Silver―Containing Copper Anodes During Electrorefining
GODIRILWE Labone L., TAKASAKI Yasushi, HAGA Kazutoshi, SHIBAYAMA Atsushi, SATO Rie, TAKAI Yoshinari
Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｓｏｃｉｅｔｙ ｏｆ Ｍａｔｅｒｉａｌｓ Ｅｎｇｉｎｅｅｒｉｎｇ ｆｏｒ Ｒｅｓｏｕｒｃｅｓ ( 日本素材物性学会 ) 25 ( 1 ) 137 - 144 2022.04
<p>Passivation behavior of high silver containing copper anodes was investigated using slowly cooled Cu- 1%Ag anodes of different lead (Pb) concentrations. The addition of Pb distributes silver in the Pb phase and reduces the amount of silver that is solidly soluble in copper and, thus, generates a fine silver powder on the anode surface which is a main contributing factor of passivation. Electrorefining experiments were conducted using a synthetic electrolyte containing 40 g/L Cu<sup>2+</sup> and 180 g/L H<sub>2</sub>SO<sub>4</sub>, at 60°C. SEM-EDS analysis was used to study the resulting anode slime and showed that increasing Pb content altered the anode slime structure from fine and compact to porous and less adherent to the anode surface. Utilizing a Cu-1%Ag0.2%Pb anode yielded the longest passivation time with a low and stable cell voltage of 0.1V. The slime morphology was characterized by precipitated metallic silver particles either as inclusion or loosely present on the surface of the abundant complex Cu-Ag-Pb sulfate type of compounds. Because of the economic importance of silver recovery from the anode slime, understanding its behavior during electrorefining will enable operating with high impurity anodes especially in secondary copper processing where metallic impurities can result from e-waste and copper alloy scrap.</p>
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OKADA Natsuo, MAEKAWA Yohei, OWADA Narihiro, HAGA Kazutoshi, SHIBAYAMA Atsushi, KAWAMURA Youhei
Journal of MMIJ ( The Mining and Materials Processing Institute of Japan ) 137 ( 1 ) 1 - 9 2021
<p>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, userfriendly and automatic mineral identification.</p>
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DODBIBA Gjergj, OSHIKAWA Hiroki, PONOU Josiane, KIM Yonggu, HAGA Kazutoshi, SHIBAYAMA Atsushi, FUJITA Toyohisa
Resources Processing ( The Resources Processing Society of Japan ) 66 ( 1 ) 15 - 28 2019
<p>Recently, the demand for LED light bulbs is rapidly increasing due to an increasing demand for energy saving lightning options. In this work, the elemental composition of LED light bulbs is first analyzed, and then a flowsheet for recovering LED chips and other valuable metals from spent LED light bulbs is put forward. The suggested flowsheet includes eddy current separation (ECS) and air tabling, in addition to several refining processes. The experimental results indicated that the eddy current separation and the air tabling are useful techniques for sorting components of LED bulbs, enabling the recycling of aluminium, plastics, and precious metals, such as gold and silver. Next, five different scenarios for treatment of spent LED light bulbs were considered and a combined life cycle assessment (LCA) and cost-benefit analysis was carried out to find out the most suitable alternative. The results of the combined assessment suggested that the recycling of mainly Al and plastics from spent LED bulbs is an environmentally friendly and cost-effective alternative.</p>
◆Original paper【 display / non-display 】
◆Introduction and explanation【 display / non-display 】
◆International conference proceedings【 display / non-display 】
◆Other【 display / non-display 】
Academic Awards Received 【 display / non-display 】
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Best Paper Award
2017.03.28
Winner： Kazutoshi HAGA, Altansukh BATNASAN, Atsushi SHIBAYAMA
Grant-in-Aid for Scientific Research 【 display / non-display 】
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Grant-in-Aid for Young Scientists(B)
Project Year： 2016.04 - Now
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Grant-in-Aid for Scientific Research(B)
Project Year： 2016.04 - Now
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Grant-in-Aid for Scientific Research(B)
Project Year： 2012.04 - 2015.03
Presentations 【 display / non-display 】
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Selective Recovery of Palladium from PGM Containing Hydrochloric Acid Solution Using Thiocarbamoyl Substituted Adsorbents
Haga K., Sato S., Rajivgandhi M., Yamada M., Shibayama, A.
International Conference on Materials Engineering for Resources 2017 (ICMR2017) (Akita, Japan) 2017.10 - 2017.10 SMER Japan
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Formation of Nano- and Micro- Gold Particles from Gold-Iodide Solution at pH 8-13
Batnasan A., Haga K., Shibayama A.
International Conference on Materials Engineering for Resources 2017 (ICMR2017) (Akita, Japan) 2017.10 - 2017.10 SMER Japan
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Investigation of Copper and Iron Recovery from Copper Ore by High Pressure Leaching
Magwaneng R. S., Haga K., Batnasan A., Shibayama A., Kosugi M., Kawarabuki R., Mitsuhashi K., Kawata M.
International Conference on Materials Engineering for Resources 2017 (ICMR2017) (Akita, Japan) 2017.10 - 2017.10 SMER Japan
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Magnetic Separation and Leaching Study of Rare Earth Elements from Apatite-Iron Ore
Battsengel A., Batnasan A., Haga K., Watanabe Y., Shibayama A.
International Conference on Materials Engineering for Resources 2017 (ICMR2017) (Akita, Japan) 2017.10 - 2017.10 SMER Japan
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Recovery of tin from waste printed circuit board using physical and chemical separation
Harada S., Takeuchi M., Haga K., Kawamura S., Takasaki Y., Shibayama A.
The 14th International Symposium on East Asian Resources Recycling Technology (Sapporo, Japan) 2017.09 - 2017.09
Academic Activity 【 display / non-display 】
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The Mining and Meterials Processing Institute of Japan
2014.01-Now