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이산요소법의 파분쇄 분야 적용: 현황 및 전망

Application of Discrete Element Method in the Field of Comminution: Current Status and Future

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키워드

주제분류자원공학

초록

최근 수십년간 이산요소법(discrete element method, DEM)은 전통적인 연속체 접근법으로 해석이 어려운 다양한 문제에그 활용성이 날로 증가하고 있으며, 선광 분야 중 파분쇄 분야에서 20여년 전부터 적극적으로 활용되고 있다. 초기 장비 내 에너지 스펙트럼 분석 중심으로 활용되던 DEM은 입자내 균열의 발생 및 전파, 파쇄, 장비 마모에 이르기까지 다양한 현상을 입자 스케일의 정보를 활용하여 분석하는 도구로 활용되어 왔으며, 물질수지모델과의 연계 해석을 통해 공정 스케일 연구의 폭을 확장시키는 데도 기여해 왔다. 본 연구에서는 최근 DEM을 이용한 분쇄 연구 동향의 변화, 활용 사례, 추후 전망 및 해결 과제 등에 대해 세부적으로 살펴보았다.

Abstract

For several decades, the discrete element method (DEM) has been broadly applied to problems that are difficult to solve using the conventional continuum approach. In the field of mineral processing, DEM has played a key role in understanding the crushing and grinding processes for the past two decades. DEM, which has been mainly utilized for obtaining detailed energy spectra inside mills in the early age, has been broadening its application to fracture analysis, crushing, and wearing in mills. Furthermore, the reliability of process scale analysis can be enhanced by combining DEM with the population balance model. This study provides a general overview of research trends, applications, prospects, and challenges of DEM in the field of comminution.

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