Substance Flow Analysis of Zinc Associated with Iron and Steel Cycle in Japan, and Environmental Assessment of EAF Dust Recycling Process
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概要
- 論文の詳細を見る
Japanese zinc production in 2005 was 6.75×105 t, and domestic demand of zinc was 4.82×105 t. The main use of metallic zinc is in the surface coating of steel and the metal accounts for 62.8% of the domestic demand. The purposes of this study are as follows: (1) to identify the material flow of zinc associated with steel production, and (2) to estimate the environmental effects (energy consumption and CO2 emission reduction) of some intermediate dust treatment processes.The major conclusions are (a) in Japan, 6.16×106 t of blast furnace/converter dust was generated in 2000, and this product contained 2.20×104 t-Zn. 0.433×106 t of EAF dust was generated and this dust contained 8.86×104 t-Zn, and (b) 9.57 MJ of energy is required for producing 1 kg of zinc oxide by the Waelz process using EAF dust, and the estimated amount of CO2 emission in this process is 1.49 kg-CO2. On the other hand, if the LAMS process proposed by the authors is employed, it is estimated that there will be a reduction of 1.70 MJ in energy consumption and a reduction of 0.14 kg-CO2 in CO2 emissions.
- 社団法人 日本鉄鋼協会の論文
- 2008-10-15
著者
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Nagasaka Tetsuya
Graduate School of Environmental Studies, Tohoku University
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NAKAJIMA Kenichi
National Institute for Environmental Studies
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Nakamura Shinichiro
Waseda University
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Nakamura Shinichiro
Graduate School Of Eocnomics Waseda University
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Nakajima Kenichi
National Institute Of Environmental Studies
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MATSUBAE YOKOYAMA
Graduate School of Environmental Studies, Tohoku University
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ITOH Satoshi
Graduate School of Engineering, Tohoku University
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Itoh Satoshi
Graduate School Of Engineering Tohoku University
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Matsubae Yokoyama
Graduate School Of Environmental Studies Tohoku University
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Nagasaka Tetsuya
Graduate School Of Environmental Studies Tohoku University
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Nagasaka Tetsuya
Graduate School Of Engineering Tohoku University
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NAGASAKA Tetsuya
Graduate School of Engineering, Tohoku University
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