Kengo Kawahara, Ichiro Daigo, Yasunari Matsuno and Yoshihiro Adachi
Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656
Recently, copper price reached the highest level ever. It is expected that the rise of copper price becomes a strong incentive for recovering copper scrap from end-of-life products. Therefore, in this paper, we aimed to analyze the relation between copper price and the amount of recovered copper scrap in Japan. A dynamic material flow analysis (MFA) of copper was conducted to estimate the amount of copper discarded in the end-of-life products during 1980-2008 in Japan. It was found that the recovery rates of copper scrap have risen with the increase in copper price, especially after 2003. A multiple linear regression model was adopted to explain the amount of recovered copper scrap during these three decades, in which copper price, the amount of copper discarded in the end-of-life products, etc. played important roles.
copper, material flow analysis, copper price, scrap recovery
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