A Characteristic Study of Ball Mill and Centr ifugal Millusing Discrete Element Method

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2005 Vol.42, Issue 4 Preview Page Next Page

A Characteristic Study of Ball Mill and Centr ifugal Millusing Discrete Element Method DEM을 이용한 Ball Mill과 Centrifugal Mill의 특성연구: 조희찬, 정석
Hee-Chan Cho and Seok Jeong

31 August 2005. pp. 393-402

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Abstract

A model based on the Discrete Element Method (DEM) was developed to simulate various types of media mills (ball mill and centrifugal mill). The model is capable of describing the motion of balls and predicting the types of force between ball and ball, and ball and wall. This advanced model can provide the ways of improving energy efficiencies and operating at optimum milling conditions.

Keywords

DEM

Ball Mill

Centrifugal Mill

Simulation

Energy

Force

본 연구에서는 분쇄매체장비(볼밀 및 원심밀)에 적용할 수 있는 DEM 모델을 연구하였다. DEM 모델은 입자들이 움직일 때 발생되는 힘의 상호작용을 분석하여 분쇄매체의 거동을 예측할 수 있는 기법이다. 본 연구에서는 우선 여러 분쇄기 중 가장 기본이 되는 볼밀에 대해 DEM을 적용시켜 모델을 검증해 보았으며 이를 원심밀에 적용하여 매체의 거동과 에너지, 힘의 형태에 대해 분석하였다. 본 연구에서는 DEM이란 수치 모델을 이용해 여러 매개변수들에 대한 분석과 함께 분쇄기내에서 일어나는 현상(매체의 거동, 충돌 에너지, 힘의 형태)들을 규명함으로써 분쇄공정에 있어 효과적인 분쇄공정과 동시에 에너지 효율을 얻을 수 있을 것으로 판단되어진다.

키워드

볼밀

원심밀

충돌에너지

힘의형태

References

신희영, 이재령, 김완태, 齋藤文良, 2004, “직각호퍼에서의 배출구크기에 따른 입자의 유동 특성,” 지구시스템 공학회지, 41/4, pp. 306-312.
Austin, L.G., 1971, “A review introduction to the mathematical description of grinding as a rate process,” Powder Technology, Vol. 5, pp. 1-17.
A. S. Kheifets, I. J. Lin, 1996, “Energy transformation in a planetary grinding mill: Part 2. Model verification, International Journal of Mineral Processing, Vol. 47, pp. 21-31.
A. S. Kheifets, I. J. Lin, 1996, “Energy transformations in a planetary grinding mill: Part 1. General treatment and model design,” International Journal of Mineral Processing, Vol. 47, pp. 1-19.
Lynch, A.J., et al., 1976, “Mathematical models of size reduction processes,” Mineral crushing and grinding circuits, Elservier, Amsterdam, pp. 27-43.
P.W. Cleary, D. Hoyer, 2000, “Centrifugal mill charge motion and power draw: comparison of DEM prediction with experiment,” Int. J. Miner. Proc., Vol. 59, pp. 131-148.
P. A. Cundall, 1979, “Discrete numerical model for granular assemblies,” International Journal of Rock Mechanics and Mining Science & Geomechanics, Vol. 29, pp. 47-65.
T. Inoue, K. Okaya, 1999, “Development of a centrifugal mill-a chain of simulation, equipment design and model validation,” Powder Technology, Vol. 105, pp. 342-350.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society for Geosystem Engineering
Journal Title(Ko) :한국지구시스템공학회지
Volume : 42
No :4
Pages :393-402

[1] 신희영, 이재령, 김완태, 齋藤文良, 2004, “직각호퍼에서의 배출구크기에 따른 입자의 유동 특성,” 지구시스템 공학회지, 41/4, pp. 306-312.

[2] Austin, L.G., 1971, “A review introduction to the mathematical description of grinding as a rate process,” Powder Technology, Vol. 5, pp. 1-17.

[3] A. S. Kheifets, I. J. Lin, 1996, “Energy transformation in a planetary grinding mill: Part 2. Model verification, International Journal of Mineral Processing, Vol. 47, pp. 21-31.

[4] A. S. Kheifets, I. J. Lin, 1996, “Energy transformations in a planetary grinding mill: Part 1. General treatment and model design,” International Journal of Mineral Processing, Vol. 47, pp. 1-19.

[5] Lynch, A.J., et al., 1976, “Mathematical models of size reduction processes,” Mineral crushing and grinding circuits, Elservier, Amsterdam, pp. 27-43.

[6] P.W. Cleary, D. Hoyer, 2000, “Centrifugal mill charge motion and power draw: comparison of DEM prediction with experiment,” Int. J. Miner. Proc., Vol. 59, pp. 131-148.

[7] P. A. Cundall, 1979, “Discrete numerical model for granular assemblies,” International Journal of Rock Mechanics and Mining Science & Geomechanics, Vol. 29, pp. 47-65.

[8] T. Inoue, K. Okaya, 1999, “Development of a centrifugal mill-a chain of simulation, equipment design and model validation,” Powder Technology, Vol. 105, pp. 342-350.

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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