Substance flow analysis of zinc associated with iron and steel cycle in Japan, and environmental assessment of EAF dust recycling process

Kenichi Nakajima*, Kazuyo Matsubae-Yokoyama, Shinichiro Nakamura, Satoshi Itoh, Tetsuya Nagasaka

*この研究の対応する著者

研究成果: Article査読

35 被引用数 (Scopus)

抄録

Japanese zinc production in 2005 was 6.75×106t, and domestic demand of zinc was 4.82×105t. 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, 6.16×106t of blast furnace/converter dust was generated In 2000, and this product contained 2.20×104t-Zn. 0.433×106t of EAF dust was generated and this dust contained 8.86×104t-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-CO 2. 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.

本文言語English
ページ(範囲)1478-1483
ページ数6
ジャーナルisij international
48
10
DOI
出版ステータスPublished - 2008

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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