솔더 스크랩의 재생을 위한 전처리 공정

정우광; 김병수; 이재천; Woo-Gwang Jung; Byung-Soo Kim; Jae-Chun Lee

Korean Journal of Materials Research, Vol.21, No.12, 673-678, December, 2011

DOI10.3740/MRSK.2011.21.12.673 Export Citation

솔더 스크랩의 재생을 위한 전처리 공정

Pretreatment Process for the Reuse of Solder Scrap Woo-Gwang Jung†, Byung-Soo Kim* and Jae-Chun Lee*

정우광 ^†, 김병수¹, 이재천¹

국민대학교 신소재공학부
¹한국지질자원연구원 광물자원연구본부

Woo-Gwang Jung^†, Byung-Soo Kim¹, and Jae-Chun Lee¹

School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, Korea
¹Mineral Resources Research Division, KIGAM, Daejeon 305-350, Korea

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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.

Keywords:solder scrap;reuse;pretreatment;lead removal;filtration;zone melting

[References]

Metallic Materials Engineering Dictionary, p. 723, Korean Institute of Metals and Materials, Jibmoonsa, Korea (2000) (in Korean). (2000)
Lee JC, Development of Technology for the Recycling of Urban Ore, p. 124, KIGAM(GP2009-011-2009(1)), Ministry of Knowledge and Economy, Korea (2009) (in Korean). (2009)
On the Web (in Korean). Retrieved Oct. 30, 2011 from http://solder.tistory.com/107. (2011)
Kubaschewski O, Alcock CB, Metallurgical Thermochemistry, 5th ed., p. 368-372, Pergamon Press, Oxford, U. K. (1979). (1979)
Hultgren R, Desai PD, Hawkins DT, Gleiser M, Kelley KK, Selected Values of the Thermodynamic Properties of Binary Alloys, p. 1266-1268, American Society for Metals, Metals Park, OH, USA (1973). (1973)
Hoshino Y, Utsunomiya T, J. Chem. Eng. Data, 27(2), 144 (1982)
Pfann WG, Zone Melting, 2nd ed., p. 29, John Wiley & Sons, Inc., New York, USA (1966). (1966)
Lee HY, Oh JK, Lee DH, Metall. Trans. B, 21, 455 (1990)

[Related Articles]

[1] Metallic Materials Engineering Dictionary, p. 723, Korean Institute of Metals and Materials, Jibmoonsa, Korea (2000) (in Korean). (2000)

[2] Lee JC, Development of Technology for the Recycling of Urban Ore, p. 124, KIGAM(GP2009-011-2009(1)), Ministry of Knowledge and Economy, Korea (2009) (in Korean). (2009)

[3] On the Web (in Korean). Retrieved Oct. 30, 2011 from http://solder.tistory.com/107. (2011)

[4] Kubaschewski O, Alcock CB, Metallurgical Thermochemistry, 5th ed., p. 368-372, Pergamon Press, Oxford, U. K. (1979). (1979)

[5] Hultgren R, Desai PD, Hawkins DT, Gleiser M, Kelley KK, Selected Values of the Thermodynamic Properties of Binary Alloys, p. 1266-1268, American Society for Metals, Metals Park, OH, USA (1973). (1973)

[6] Hoshino Y, Utsunomiya T, J. Chem. Eng. Data, 27(2), 144 (1982)

[7] Pfann WG, Zone Melting, 2nd ed., p. 29, John Wiley & Sons, Inc., New York, USA (1966). (1966)

[8] Lee HY, Oh JK, Lee DH, Metall. Trans. B, 21, 455 (1990)