遊星ボールミルによる液中粉砕結果と DEM シミュレーションにより算出した衝突エネルギー分布との関係

Akira Kondo; Shingo Ishihara; Kizuku Kushimoto; Takahiro Kozawa; Junya Kano; Makio Naito

doi:10.4164/sptj.57.176

遊星ボールミルによる液中粉砕結果と DEM シミュレーションにより算出した衝突エネルギー分布との関係

Translated title of the contribution: Relationship between grinding results in a planetary ball mill with liquid media and the distribution of ball impact energy calculated by DEM simulation

Akira Kondo, Shingo Ishihara, Kizuku Kushimoto, Takahiro Kozawa, Junya Kano, Makio Naito

Center for Mineral Processing and Metallurgy (CMPM)

Research output: Contribution to journal › Article › peer-review

Abstract

Ball motions in a planetary ball mill with liquid media were simulated using the DEM. The distributions of ball impact energy were calculated from the simulation. Then, the cumulative value of the impact energy (E) and median of the impact energy at one collision (e_1/2) were calculated. Grinding tests were examined and relationships between particle sizes and the specific impact energy multiplied by grinding time (E_wt) were evaluated. At higher acceleration, particle sizes of ground powders decreased faster. However, from the viewpoint of the impact energy, the energy efficiency got worse. With increase of ball sizes, e_1/2 increased but the number of collisions decreased. As results, using the smaller balls, particle sizes decreased faster and the energy efficiency was also better. The amount of E_wt required to obtain 0.5 μm mean diameter (E_wt*(0.5 μm)) was calculated for each test condition. The fitting curve was applied for the relation of E_wt*(0.5 μm) vs e_1/2.

Translated title of the contribution	Relationship between grinding results in a planetary ball mill with liquid media and the distribution of ball impact energy calculated by DEM simulation
Original language	Japanese
Pages (from-to)	176-183
Number of pages	8
Journal	Journal of the Society of Powder Technology, Japan
Volume	57
Issue number	5
DOIs	https://doi.org/10.4164/sptj.57.176
Publication status	Published - 2020

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology
Fluid Flow and Transfer Processes
Filtration and Separation

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遊星ボールミルによる液中粉砕結果と DEM シミュレーションにより算出した衝突エネルギー分布との関係. / Kondo, Akira; Ishihara, Shingo ; Kushimoto, Kizuku; Kozawa, Takahiro; Kano, Junya; Naito, Makio.

In: Journal of the Society of Powder Technology, Japan, Vol. 57, No. 5, 2020, p. 176-183.

Research output: Contribution to journal › Article › peer-review

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abstract = "Ball motions in a planetary ball mill with liquid media were simulated using the DEM. The distributions of ball impact energy were calculated from the simulation. Then, the cumulative value of the impact energy (E) and median of the impact energy at one collision (e1/2) were calculated. Grinding tests were examined and relationships between particle sizes and the specific impact energy multiplied by grinding time (Ewt) were evaluated. At higher acceleration, particle sizes of ground powders decreased faster. However, from the viewpoint of the impact energy, the energy efficiency got worse. With increase of ball sizes, e1/2 increased but the number of collisions decreased. As results, using the smaller balls, particle sizes decreased faster and the energy efficiency was also better. The amount of Ewt required to obtain 0.5 μm mean diameter (Ewt*(0.5 μm)) was calculated for each test condition. The fitting curve was applied for the relation of Ewt*(0.5 μm) vs e1/2.",

keywords = "Ball impact energy, Ball motion, DEM simulation, Grinding, Particle size, Wet ball milling",

author = "Akira Kondo and Shingo Ishihara and Kizuku Kushimoto and Takahiro Kozawa and Junya Kano and Makio Naito",

year = "2020",

doi = "10.4164/sptj.57.176",

language = "Japanese",

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AU - Kondo, Akira

AU - Ishihara, Shingo

AU - Kushimoto, Kizuku

AU - Kozawa, Takahiro

AU - Kano, Junya

AU - Naito, Makio

PY - 2020

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N2 - Ball motions in a planetary ball mill with liquid media were simulated using the DEM. The distributions of ball impact energy were calculated from the simulation. Then, the cumulative value of the impact energy (E) and median of the impact energy at one collision (e1/2) were calculated. Grinding tests were examined and relationships between particle sizes and the specific impact energy multiplied by grinding time (Ewt) were evaluated. At higher acceleration, particle sizes of ground powders decreased faster. However, from the viewpoint of the impact energy, the energy efficiency got worse. With increase of ball sizes, e1/2 increased but the number of collisions decreased. As results, using the smaller balls, particle sizes decreased faster and the energy efficiency was also better. The amount of Ewt required to obtain 0.5 μm mean diameter (Ewt*(0.5 μm)) was calculated for each test condition. The fitting curve was applied for the relation of Ewt*(0.5 μm) vs e1/2.

AB - Ball motions in a planetary ball mill with liquid media were simulated using the DEM. The distributions of ball impact energy were calculated from the simulation. Then, the cumulative value of the impact energy (E) and median of the impact energy at one collision (e1/2) were calculated. Grinding tests were examined and relationships between particle sizes and the specific impact energy multiplied by grinding time (Ewt) were evaluated. At higher acceleration, particle sizes of ground powders decreased faster. However, from the viewpoint of the impact energy, the energy efficiency got worse. With increase of ball sizes, e1/2 increased but the number of collisions decreased. As results, using the smaller balls, particle sizes decreased faster and the energy efficiency was also better. The amount of Ewt required to obtain 0.5 μm mean diameter (Ewt*(0.5 μm)) was calculated for each test condition. The fitting curve was applied for the relation of Ewt*(0.5 μm) vs e1/2.

KW - Ball impact energy

KW - Ball motion

KW - DEM simulation

KW - Grinding

KW - Particle size

KW - Wet ball milling

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