Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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A Comparative Study for Grinding Media Behavior and DEM Simulation at Actual Grinding Zone on a Traditional Ball Mill

매체형 전동밀의 실제 분쇄장에서 분쇄매체의 거동과 DEM 시뮬레이션의 비교연구

  • Bor, Amgalan (Engineering Research Center (ERC) for Integrated Mechatronics Materials and Components, Changwon National University) ;
  • Jargalsaikhan, Battsetseg (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)
  • 보르 암갈란 (창원대학교 메카트로닉스 융합부품소재 연구센터(ERC)) ;
  • 자갈사이항 바트체첵 (창원대학교 메카트로닉스 융합부품소재 연구센터(ERC)) ;
  • 이재현 (창원대학교 메카트로닉스 융합부품소재 연구센터(ERC)) ;
  • 최희규 (창원대학교 대학원 금속신소재공학과)
  • Received : 2019.03.27
  • Accepted : 2019.09.02
  • Published : 2019.12.01
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Abstract

This study was performed the real motion and DEM simulation of ball motion using three different types of grinding media with different size and materials in media formation for optimization of process conditions in a traditional ball mill (media ball mill). In the simulation, the rotational speed of the mill, the material of the medium, the velocity of the medium, and the coefficient of friction between the media and the wall of pot were fixed into the actual experimental conditions. The motion of various kinds of grinding media was quantitatively measured by setting the grinding zone defined in the present study on the photographs taken and the snapshot images analyzed in the simulation. In addition, we observed the quantitatively measured value and the changed morphology of the sample and examined the correlation. Therefore, it is suggested to optimize the grinding media which has the greatest influence on the grinding zone under specific experimental conditions.

본 연구는 매체형 전동밀(전동 볼 밀)에서 매체선정에 관한 공정조건 최적화를 위하여, 직경과 재질이 각각 다른 3가지 종류의 분쇄매체를 이용, 매체의 움직임을 실제 촬영하고 DEM 시뮬레이션을 병행하여 비교 연구하였다. 시뮬레이션에서는 밀의 회전속도, 매체의 재질, 매체의 운동속도, 매체와 포트 벽면과의 마찰계수 등을 실제 실험조건과 동일하게 조건을 맞추었다. 다양한 종류의 분쇄매체의 움직임을 실제 촬영된 사진 및 시뮬레이션에서 해석된 스냅샷 사진 위에, 본 연구에서 정의한 분쇄장을 설정하여 해석함으로써 그 값을 정량적으로 측정하였다. 또한, 정량적으로 측정된 값과 분쇄시료의 변화된 모습을 관찰하여 그 상관관계를 검토하였다. 따라서 특정 실험조건에서 분쇄장에 가장 큰 영향을 주는 분쇄매체의 최적화를 제언 하고자 하였다.

Keywords

References

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