Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Pretreatment Process for the Reuse of Solder Scrap

솔더 스크랩의 재생을 위한 전처리 공정

  • 정우광 (국민대학교 신소재공학부) ;
  • 김병수 (한국지질자원연구원 광물자원연구본부) ;
  • 이재천 (한국지질자원연구원 광물자원연구본부)
  • Received : 2011.11.02
  • Accepted : 2011.11.11
  • Published : 2011.12.27
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Abstract

With an increased production of Printed Circuit Boards (PCBs) in electronic equipment, the consumption of solder alloys is growing globally. Recently, increasing importance of recycling solder scrap has been recognized. Generally, solder scrap contains many impurities such as plastics and other metals. Hazardous components must be eliminated for recycling solder scrap. The present work studied pretreatment for reuse of solder scrap alloys. An experiment was conducted to enhance the cleanliness of solder scrap melt and eliminate impurities, especially lead. Physical separation with sieving and magnetic force was made along with pyrometallurgical methods. A small decrease in lead concentration was found by high temperature treatment of solder scrap melt. The impurities were removed by filtration of the solder scrap melt, which resulted in improvement of the melt cleanliness. A very low concentration of lead was achieved by a zone melting treatment with repeated passage. This study reports on a pretreatment process for the reuse of solder scrap that is lead free.

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References

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