抄録
Mixing is an important process in various powder handling and operations. Objective of this study was DEM (discrete element method) simulation to grasp mixing properties, especially for mixing rate and final mixing degree, in intensive mixer which is drum typed stirring mill with eccentric agitator and baffle plate. To validate the simulation results, mixing experiments using hematite particles were also conducted. Both in simulation and experiment, various sample size was adopted for mixing evaluation because mixing degree depends on sample size. As a result in experiment, mixing rate and final mixing degree became lower and higher respectively as larger sample size was adopted. Similar trend was achieved in simulation. Furthermore, effect of agitator rotation speed, particle size and mill angle for mixing properties was investigated in DEM simulation. Simulation results suggested that mixing was achieved by early rapid convective mixing, followed by slow diffusive mixing. High rotation speed of agitator made early convective mixing more rapidly whereas it made following diffusive mixing more slowly. When the particle size became larger, convective mixing became dominant. Simulation results also demonstrated that 30° of machine angle brought most rapid mixing rate and total mixing rate became higher in binary components system.
| 元の言語 | English |
|---|---|
| ホスト出版物のタイトル | EARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology |
| 出版者 | International Symposium on East Asian Resources Recycling Technology |
| ページ | 827-836 |
| ページ数 | 10 |
| 出版物ステータス | Published - 2015 |
| イベント | 13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015 - Pattaya, Thailand 継続期間: 2015 11 1 → 2015 11 4 |
Other
| Other | 13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015 |
|---|---|
| 国 | Thailand |
| 市 | Pattaya |
| 期間 | 15/11/1 → 15/11/4 |
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ASJC Scopus subject areas
- Environmental Science(all)
これを引用
Fundamental investigation of mixing properties evaluation for Intensive mixer using DEM simulation. / Kawabe, Natsuki; Tsunazawa, Yuki; Tokoro, Chiharu.
EARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology. International Symposium on East Asian Resources Recycling Technology, 2015. p. 827-836.研究成果: Conference contribution
}
TY - GEN
T1 - Fundamental investigation of mixing properties evaluation for Intensive mixer using DEM simulation
AU - Kawabe, Natsuki
AU - Tsunazawa, Yuki
AU - Tokoro, Chiharu
PY - 2015
Y1 - 2015
N2 - Mixing is an important process in various powder handling and operations. Objective of this study was DEM (discrete element method) simulation to grasp mixing properties, especially for mixing rate and final mixing degree, in intensive mixer which is drum typed stirring mill with eccentric agitator and baffle plate. To validate the simulation results, mixing experiments using hematite particles were also conducted. Both in simulation and experiment, various sample size was adopted for mixing evaluation because mixing degree depends on sample size. As a result in experiment, mixing rate and final mixing degree became lower and higher respectively as larger sample size was adopted. Similar trend was achieved in simulation. Furthermore, effect of agitator rotation speed, particle size and mill angle for mixing properties was investigated in DEM simulation. Simulation results suggested that mixing was achieved by early rapid convective mixing, followed by slow diffusive mixing. High rotation speed of agitator made early convective mixing more rapidly whereas it made following diffusive mixing more slowly. When the particle size became larger, convective mixing became dominant. Simulation results also demonstrated that 30° of machine angle brought most rapid mixing rate and total mixing rate became higher in binary components system.
AB - Mixing is an important process in various powder handling and operations. Objective of this study was DEM (discrete element method) simulation to grasp mixing properties, especially for mixing rate and final mixing degree, in intensive mixer which is drum typed stirring mill with eccentric agitator and baffle plate. To validate the simulation results, mixing experiments using hematite particles were also conducted. Both in simulation and experiment, various sample size was adopted for mixing evaluation because mixing degree depends on sample size. As a result in experiment, mixing rate and final mixing degree became lower and higher respectively as larger sample size was adopted. Similar trend was achieved in simulation. Furthermore, effect of agitator rotation speed, particle size and mill angle for mixing properties was investigated in DEM simulation. Simulation results suggested that mixing was achieved by early rapid convective mixing, followed by slow diffusive mixing. High rotation speed of agitator made early convective mixing more rapidly whereas it made following diffusive mixing more slowly. When the particle size became larger, convective mixing became dominant. Simulation results also demonstrated that 30° of machine angle brought most rapid mixing rate and total mixing rate became higher in binary components system.
KW - DEM
KW - Mixing ratio
KW - Powder mixing
UR - http://www.scopus.com/inward/record.url?scp=85017237736&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85017237736&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85017237736
SP - 827
EP - 836
BT - EARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology
PB - International Symposium on East Asian Resources Recycling Technology
ER -