Estimation of the Amount of Iron and Steel Industrial-scraps Using I/O Table

Abstract

The Japan Ferrous Raw Materials Association has already established two methods for the estimation of amounts of iron and steel industria scraps. In this study, the third method using the I/O table and the unit prices of scrap was proposed, and a database of iron and steel industrial-scraps was constructed according to this method. Since the I/O table is reliable and detail data source authorized by the government, it is possible to do precise evaluation for the amounts of iron and steel industrial-scrap in each category. The total amount of iron and steel industrial-scrap generated in 1995 was evaluated as 8316×103 t.