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2021 Vol.31, Issue 5 Preview Page
Effect of Friction Coefficient from DEM Simulation in Grinding Zone of the Ball Mill

볼 밀의 분쇄장에서 DEM 시뮬레이션을 통한 마찰계수 영향

Battsetseg Jargalsaikhan12
,
Amgalan Bor1
,
Khulan Uranchimeg13
,
Jehyun Lee12
,
Heekyu Choi234†
자갈사이항 바트체첵12
,
보르 암갈란1
,
오란치멕 쿨란13
,
이 재현12
,
최 희규234†
1Engineering Research Center (ERC) for Integrated Mechatronics Materials and Components, Changwon National University, Changwon, Gyoungnam 641-773, Republic of Korea
2Graduate School of Material Science Engineering, Changwon National University, Changwon, Gyoungnam 641-773, Republic of Korea
3Graduate School of Convergence on Culture Technology, Changwon National University, Changwon, Gyoungnam 641-773, Republic of Korea
4Department of Mechatronics Convergence Engineering, College of Future Convergence, Changwon National University, Changwon, Gyoungnam 641-773, Republic of Korea
1창원대학교 메카트로닉스 융합부품소재 연구센터(ERC)
2창원대학교 대학원 신소재공학과
3창원대학교 대학원 문화융합기술협동과정
4창원대학교 메카융합공학과
†Corresponding author E-Mail : hkchoi99@changwon.ac.kr (H. Choi, Changwon Nat'l Univ.)
May 2021. pp. 286-295
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Abstract

This study attempts to find optimal conditions of the friction coefficient using a discrete element method (DEM) simulation with various friction coefficient conditions and three different grinding media with various ball sizes in a traditional ball mill (TBM). Using ball motion of the DEM simulation are obtained using the optimal friction coefficient compared with actual motion; photographs are taken by the digital camera and the snapshot images are analyzed. In the simulation, the rotation speed of the mill, the materials and velocity of the grinding media, and the friction coefficient between the balls and the wall of the pot are fixed as the actual experimental conditions. We observe the velocity according to the friction coefficient from the DEM simulation. The friction coefficient is found to increase with the velocity. Milling experiments using a traditional ball mill with the same experimental conditions as those of the DEM simulation are conducted to verify the simulated results. In addition, particle morphology change of copper powder is investigated and analyzed using scanning electron microscopy (SEM) for the milling experiment.

Keywords
a traditional ball mill
friction coefficient
DEM simulation
grinding media
velocity
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 31
  • No :5
  • Pages :286-295
  • Received Date : 2021-03-16
  • Revised Date : 2021-04-28
  • Accepted Date : 2021-04-28
  • DOI :https://doi.org/10.3740/MRSK.2021.31.5.286
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