Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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An Eco-efficiency Analysis of Nd Permanent Magnet Recycling

Nd 영구자석(永久磁石) 재활용(再活用)의 Eco-efficiency 분석(分析)

  • Kim, Byung Ju (Product Environmental Assessment Team, Green Biz Dept., SMaRT ECO) ;
  • Kim, Hyoungseok (Dept. of Material Chemistry & Engineering, Konkuk University) ;
  • Yoon, Ho Sung (Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Cho, Bong Gyoo (Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Hur, Tak (Dept. of Material Chemistry & Engineering, Konkuk University)
  • Received : 2013.02.28
  • Accepted : 2013.04.22
  • Published : 2013.08.30
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Abstract

In this study, eco efficiency analysis is performed to analyze Neodymium (Nd) containing permanent magnet recycling process. Life cycle assessment (LCA) and life cycle costing (LCC) are used to apply eco efficiency analysis. In the environmental aspects, global warming potential (GWP) of 1kg permanent magnet is 1.25E + 00 kg $CO_2$ eq. and abiotic resource depletion potential (ADP) is 1.10E - 02 Sb eq. This recycling process costs about 2130 KWR. Environmental efficiency of GWP is at 6.43 and ADP is at 5.32 when compared with vigin metal. Economic efficiency is at 6.74. This study confirms that Nd containing permanent magnet recycling process is sustainable system because of environmental and economical improvement.

본 연구에서 네오디뮴 (Nd)를 함유한 영구자석의 재활용 공정에 대한 Eco-efficiency 평가를 수행하였다. Eco-efficiency를 분석하기 위해 환경전과정평가 (LCA)와 전과정비용평가 (LCC)가 수행되었다. 환경적 측면에서, 1 kg의 영구자석을 재활용하기 위해서 1.25E + 00 kg $CO_2$ eq.에 해당하는 지구온난화영향을 나타내었으며, 자원고갈 측면에서는 1.10E - 02 Sb eq.에 해당하는 환경영향이 도출되었다. 이 재활용을 위해서 약 2130원의 비용이 소요되었다. 순수한 Nd와 비교를 수행했을 때, 지구온난화 측면에서 6.43배의 효율성이 나타나는 것으로 분석되었으며, 자원고갈 측면에서 분석하였을 때에는 5.32배의 효율성이 나타나는 것으로 분석되었다. 경제적 측면에서, 약 6.74배의 효율성이 나타났으므로, 본 재활용 공정은 환경적 및 경제적으로 모두 개선된 지속가능한 시스템이라고 분석되었다.

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