Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Efficient Recycling of Printed Circuit Boards from Disassembly/Separation Process of waste LCD TVs: Composition Analysis and Value-wise Classification

LCD TV 해체 시 발생하는 PCB의 효율적 재활용을 위한 구조 분석 및 등급별 분류

  • Hong, Myung Hwan (Advanced Materials & Processing Center, Institute for Advanced Engineering) ;
  • Park, Kyung-Soo (Advanced Materials & Processing Center, Institute for Advanced Engineering) ;
  • Swain, Basudev (Advanced Materials & Processing Center, Institute for Advanced Engineering) ;
  • Kang, Lee-Seung (Advanced Materials & Processing Center, Institute for Advanced Engineering) ;
  • Suk, Han Gil (Department of Materials & Metallurgical Engineering, Kangwon National University) ;
  • Hong, Hyun Seon (Advanced Materials & Processing Center, Institute for Advanced Engineering)
  • 홍명환 (고등기술연구원 신소재공정센터) ;
  • 박경수 (고등기술연구원 신소재공정센터) ;
  • ;
  • 강이승 (고등기술연구원 신소재공정센터) ;
  • 석한길 (강원대학교 재료금속공학과) ;
  • 홍현선 (고등기술연구원 신소재공정센터)
  • Received : 2015.01.08
  • Accepted : 2015.02.06
  • Published : 2015.02.28
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Abstract

Various waste PCBs arose during disassembly of LCD TVs and monitors in which they originally functioned for transmission of imaging signal, power supply, and imaging control. In those functional PCBs, gold and copper are contained at far more acceptable level, exceeding mining grade ores. Those valuable metals and their contents widely vary with functionality and end use of PCBs. Therefore, compositional analysis of individual waste PCBs from disassembled LCD TVs and monitors were performed in the present study to classify them into three categories: high gold yield and low gold yield PCBs and those without gold contents. Besides, additional chemical analysis was made to reveal gold and copper contents in the waste PCBs arising from actual disassembly/separation of end-of-life LCD TVs and monitors.

재활용을 위한 LCD TV 분해 시 영상 신호 송신, 전원 공급, 화상 구현 등을 위한 다양한 종류의 PCB가 발생한다. PCB에는 금이나 구리와 같은 유가금속이 다량 함유 되어 있으나 사용용도, PCB 패키징 방법에 따라 함유 되어 있는 유가금속의 종류와 함유량에 차이가 있다. 본 연구에서는 PCB 종류에 따른 구조 분석을 통하여 PCB에 함유 된 금과 구리의 함유량에 따라 PCB를 등급별로 분류 하고자 하였으며 금 회수 효율이 높은 PCB, 금 회수 효율이 낮은 PCB, 금이 함유되어 있지 않은 PCB 세 종류로 분류를 하였다. 또한 실제 LCD TV를 분해하여 발생된 PCB에 대한 함유량 분석을 통하여 PCB 내 금과 구리 함유량을 분석하였다.

Keywords

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