産業連関表を用いた製鉄プロセスの環境負荷分析

概要

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Recycle of steel is expected to conserve natural resources, such as ores, and reduce environmental burden which accompanies steel production. However, the difference of environmental burden caused by blast furnace process and electric furnace process, which are used for steel recycling, is not quantitatively clear. In this study, we combine monetary data from I/O table and quantitative data from steel statistics, and estimate total CO_2 emission from each steel making process. According to the result, total CO_2 emission is 458kgC/t for BF process and 136kgC/t for EF process. We also evaluate the change of CO_2 emission from EF process in the case where more pig iron is added to EF process in order to lower the concentration of impurities. The result shows that the difference in CO_2 emission between both methods disappears when pig iron input exceeds 75% of the total charge of iron materials to EF process.
社団法人日本鉄鋼協会の論文
1997-10-01