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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received October 16, 2017
Accepted January 3, 2018

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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전동볼밀의 복합재 제조공정에서 각종 실험조건에 따른 입자형상 변화 및 DEM 시뮬레이션을 통한 밀링 효율의 고찰 - 회전속도, 매체크기, 매체재질의 영향

Particle Morphology Behavior and Milling Efficiency by DEM Simulation during Milling Process for Composites Fabrication by Traditional Ball Mill on Various Experimental Conditions- Effect of Rotation Speed, Ball Size, and Ball Material

보르 암갈란^{1 2} 바춘흘루 이치커^{1 2} 자갈사이항 바트체첵^{1 2} 이재현^{1 2} 최희규^{2 3†}

Amgalan Bor^{1 2} Ichinkhorloo Batchuulun^{1 2} Battsetseg Jargalsaikhan^{1 2} Jehyun Lee^{1 2} Heekyu Choi^{2 3†}

¹창원대학교 메카트로닉스 융합부품소재 연구센터(ERC), 51140 경남 창원시 의창구 창원대학로 20 ²창원대학교 대학원 금속신소재공학과, 51140 경남 창원시 의창구 창원대학로 20 ³창원대학교 공과대학 메카융합학과, 51140 경남 창원시 의창구 창원대학로 20

¹Engineering Research Center (ERC) for Integrated Mechatronics Materials and Components, Changwon National University, 20, Changwondaehak-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do, 51140, Korea ²Graduate School of Material Science Engineering, Changwon National University, 20, Changwondaehak-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do, 51140, Korea ³Department of Mechanics Convergence, College of Engineering, Changwon National University, 20, Changwondaehak-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do, 51140, Korea

hkchoi99@changwon.ac.kr

Korean Chemical Engineering Research, April 2018, 56(2), 191-203(13), 10.9713/kcer.2018.56.2.191 Epub 5 April 2018

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Abstract

이 연구는 각각 크기와 재질이 다른 3 가지 종류의 분쇄 매체를 이용하여 회전속도와 밀링 시간의 따른 구리 (Cu) 분말의 형상변화의 과정에 미치는 영향을 관찰하고, 볼 움직임의 DEM시뮬레이션을 행하였다. 전동볼밀에서 볼 움직임의 3차원 시뮬레이션을 통해 분쇄 메커니즘을 규명하기 위하여 분쇄매체의 힘, 운동에너지, 매체 운동속도 등을 계산하였다. 시뮬레이션에서는 회전속도, 볼 재질, 운동속도, 마찰계수 등을 실제 실험조건과 동일하게 조건을 맞추어 투입되는 에너지의 변화량도 계산하였다. 주사전자현미경 결과를 살펴보면 볼 직경이 작을 때 입자형상이 불규칙한 형태에서 구형 형태로 변화하는 것을 알 수 있었다.

This study was investigated the effect of the morphology change of copper (Cu) powders under the different rotational speed and milling time by using three kinds of grinding media with different size and materials, and performed DEM simulations of ball behavior. In order to clarify the mechanism of grinding by three - dimensional simulations of the ball behavior in a traditional ball mill, the force, kinetic energy, and medium velocity of the grinding media were calculated. In the simulation, the amount of change of the input energy was also calculated by adjusting the rotational speed, ball material, kinetic velocity, and friction coefficient in the same as the actual experimental conditions. The scanning electron microscope results show that the particle morphology changes from irregular to spherical when the ball size is small.

Keywords

Traditional ball mill DEM Simulation Copper Particle Morphology

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