폐PCB에 장착된 전기/전자부품의 분리 및 특성 = Disassembly of the Mounted Electric/Electronic Components on Wasted Printed Circuit Board and their Characterizations

국문 초록 (Abstract)

폐인쇄회로기판에 장착되어 있는 전기/전자 부품의 재사용/재활용 가능성을 향상시키기 위해 부품분리 실험 및 분리된 부품의 특성평가를 실시하였다. 부품 분리실험은 연삭방법을 채용한 부품분리기를 자체개발하여 수행하였으며, 연마석의 높이(0.5, 1.5 mm), 회전속도(2500, 5500 rpm), WPCB 이동속도(1~5 cm/sec), 연삭횟수 등을 변화시키면서 부품분리 효율을 평가하고 최적 처리조건을 도출하였다. 부품분리 효율은 장착된 부품의 전체무게에 대한 분리된 부품의 무게비로 평가하였으며, 각 처리조건에서 3개의 WPCB에 대해 평균값으로 계산하였다. 연마석 높이 1.5 mm, 회전속도 5500 rpm, 이동속도 1 cm/s 처리조건으로 3 회 처리 시, 95.2 %의 부품분리가 가능하였다. 처리 후 WPCB는, 부품, 부품이 탈거된 WPCB, 연삭분말로 분리되었으며, WPCB의 금속성분 함량은 17.9 wt%였으며, 이 중 48.4 % 금속성분(8.7 wt%)은 부품에 함유되어 있음을 확인하였다. WPCB에서 총 20개 금속원소가 검출되었으며, 이 중 Cu, Al, Fe, Pb가 전체 금속의 90.7 %를 차지하였고, Pb, Ag는 연삭분말에 농축되어 분포하였다.

다국어 초록 (Multilingual Abstract)

Disassembly of the mounted electric/electronic components (EECs) on WPCBs and their characterizations were surveyed for enhancing the reusing/recycling feasibility of WPCBs. Disassembling treatment was carried out by using the self-designed apparatus installed grinding attachment. The weight ratio of the detached EECs was used as the efficiency of disassembly, which was the average value of the result treated with 3 WPCBs in each condition. 95.2 wt% of the disassembling efficiency could be accomplished ultimately by 3 repetitive treatments at a grinder height of 1.5 mm, a grinder speed of 5500 rpm and the WPCB moving speed of 1 cm/s. After this treatment, WPCB could be categorized to three divisions such as disassembled EECs, dismantled board and abrasion powders. Total content of metal in WPCB was surveyed to 17.9 wt%, and 48.4 % of them (8.7wt%) was contained in the division of EECs. 20 metal elements could be detected in WPCBs. Moreover, 4 major elements (Cu, Al, Fe, Pb Cu) in total metal content were comprised at 90.7 % and Pb/Ag existed mainly in abrasion powders.

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