Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of Friction Coefficient from DEM Simulation in Grinding Zone of the Ball Mill

볼 밀의 분쇄장에서 DEM 시뮬레이션을 통한 마찰계수 영향

  • Jargalsaikhan, Battsetseg (Engineering Research Center (ERC) for Integrated Mechatronics Materials and Components, Changwon National University) ;
  • Bor, Amgalan (Engineering Research Center (ERC) for Integrated Mechatronics Materials and Components, Changwon National University) ;
  • Uranchimeg, Khulan (Engineering Research Center (ERC) for Integrated Mechatronics Materials and Components, Changwon National University) ;
  • Lee, Jehyun (Engineering Research Center (ERC) for Integrated Mechatronics Materials and Components, Changwon National University) ;
  • Choi, Heekyu (Graduate School of Material Science Engineering, Changwon National University)
  • 자갈사이항 바트체첵 (창원대학교 메카트로닉스 융합부품소재 연구센터(ERC)) ;
  • 보르 암갈란 (창원대학교 메카트로닉스 융합부품소재 연구센터(ERC)) ;
  • 오란치멕 쿨란 (창원대학교 메카트로닉스 융합부품소재 연구센터(ERC)) ;
  • 이재현 (창원대학교 메카트로닉스 융합부품소재 연구센터(ERC)) ;
  • 최희규 (창원대학교 대학원 신소재공학과)
  • Received : 2021.03.16
  • Accepted : 2021.04.28
  • Published : 2021.05.27
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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

Acknowledgement

This research was supported by Changwon National University in 2021-2022.

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