Development of a Dynamic Substance Flow Model of Zinc in Japan
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概要
- 論文の詳細を見る
In this paper, a dynamic substance flow model of zinc in Japan was conducted. Currently, approximately 60% of zinc in Japan is used for galvanized steel (galvanized sheet and other galvanized products), followed by brass. In other words, zinc has many linkages to other substances. A dynamic model was used to look at these linkages of zinc to other substances in the production stage through other stages. In addition, dissipated zinc used in galvanized sheets and other galvanized products during the use stage was taken into account, using the results of previous atmospheric-exposure tests. Most discarded zinc is recovered as steel scrap or copper-alloy scrap. When used steel is remelted in an electric arc furnace (EAF), zinc is vaporized and collected as EAF dust. Therefore, this steel-associated zinc reenters the zinc cycle. By comparison, when zinc is used in copper alloys, zinc is not recycled and ends its life in the copper cycle. The mass balance of zinc as derived by our substance flow analysis was verified by comparing estimated values of the model with statistics and other estimates on zinc recovery. Using this model, zinc stocks in Japan was estimated to total approximately 3300 kt at 2005 (26 kg/cap), or enough for around seven years. The amount of unrecovered zinc in 2005 was estimated at around 182 kt. Of this zinc loss, 73% went unrecovered in the steel cycle, e.g. it dissipated into the environment as sacrificial materials, or was in steel that was not collected for recycling.
- 社団法人 日本鉄鋼協会の論文
- 2009-08-15
著者
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Adachi Yoshihiro
Dep. Of Materials Engineering Graduate School Of Engineering The Univ. Of Tokyo
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Daigo Ichiro
Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo
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Matsuno Yasunari
Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo
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Adachi Yoshihiro
Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo
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Adachi Yoshihiro
Department Of Materials Engineering Graduate School Of Engineering The University Of Tokyo
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Matsuno Yasunari
Department Of Materials Engineering Graduate School Of Engineering The University Of Tokyo
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Daigo Ichiro
Department Of Materials Engineering Graduate School Of Engineering The University Of Tokyo
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TABAYASHI Hiroshi
Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo
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Tabayashi Hiroshi
Department Of Materials Engineering Graduate School Of Engineering The University Of Tokyo
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