코로나 방전 정전선별기 내 PCB 입자의 이동궤도 시뮬레이션
Simulation on the PCB Particle Trajectories in Corona-discharge Electrostatic Separator
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참고문헌
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초록
코로나 방전 정전선별기 내에서 인쇄회로기판(Printed Circuit Board, PCB) 분쇄 입자의 이동궤도를 전산 모사하였다. 여기서 PCB입자는 전자부품 분리된 기판을 파쇄한 것으로, 대부분 구리와 FR-4(Flame Retardant Level-4)로 이루어져있다. 우선 입자가 선별기내 회전전극으로부터 탈착 지점을 계산하였으며, 중력, 원심력, 정전기력의 평형으로부터 유도되었다. 한편 탈착 후 이동궤도는 입자의 운동방정식으로부터 구한 가속도를 시간 적분하여 계산하였다. 시뮬레이션 변수는 입자의 크기, 공급전압의 세기, 회전전극속도 및 유도전극 각도로 하였다. 입자 이동궤도에 미치는 영향은 구리 입자의 경우에는 회전속도가 주요 변수였으나, 반면 FR-4 입자의 경우에는 상기 모든 변수에 영향을 받는 것으로 나타났다.
Abstract
The trajectories of PCB(Printed Circuit Board) particles in the corona discharge electrostatic separation was simulated. ThePCB particles are prepared by crushing bare board, which disassembled from electronic components, consist mostly of copperand FR-4(Flame Retardant Level-4) Firstly, a model was established for calculating of detachment points of PCB particles fromthe rotating electrode in separator. The model of detachment points was derived from equilibrium of force such as gravity force,centrifugal force, electrostatic force. The trajectories of particles after detachment was calculated by acceleration derived fromtime-integrating method of motion equation. In this simulation, particle size, supplied voltage, rotation speed of rotating roll electrodeand angle of induction electrode were adopted as variables. While the trajectories of FR-4 particles were affected by allvariables, rotation speed of rotating roll electrode was dominant variables affecting trajectories of copper particles.
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