Abstract
The study to obtain tantalum concentration from electronic components (ECs) on Printed circuit board assembly (PCBA) of laptop was conducted. Electronic components on laptop PCBA were detached from boards by using self-developed experimental apparatus. The detached electronic components were sieved and 93.2 wt.% of tantalum capacitors were concentrated from the size interval from 2.80 mm to 6.35 mm. The tantalum capacitors were pulverized by hammer mill and electrodes (anode and cathode) were removed from the grinding products by using magnetic separators under the magnetic force of 300 Gauss. Finally, tantalum concentrate was concentrated from the magnetic separator products by using Knelson concentrator, and the maximum efficiency of 76.9% was achieved under the operating condition of bowl rotating speed of 200 rpm, and fluidizing water flowrate of 7 L/min. The grade and recovery of Ta concentrate under the condition were 81.1% and 78.8%, respectively.
노트북 실장인쇄회로기판(Printed Circuit Board Assembly, PCBA)으로부터 탄탈럼을 회수하기 위한 선별실험을 실시하였다. 우선 노트북 실장인쇄회로기판에 실장된 전자부품(Electronic Components, ECs)을 자체개발한 실험장치를 이용하여 기판으로부터 분리하였다. 분리된 전자부품을 체분리하여 -6.35+2.80 mm구간에서 전체 탄탈럼 캐퍼시터의 약 93.2 wt.%를 회수할 수 있었다. 회수된 탄탈럼 캐퍼시터를 해머밀로 분쇄 후, 자력선별기를 통해 자력세기 300 가우스에서 분쇄물 중의 전극을 제거하였다. 전극이 제거된 자력선별 산물을 대상으로 넬슨 선별기(Knelson concentrator)를 이용한 선별 실험 결과 Bowl의 회전수 200 rpm, 유동층수 유량 7 L/min에서 76.9%의 최대 선별효율을 보였으며, 이때 품위 및 회수율은 각각 약 81.1%, 약 78.8%를 나타내었다.
