Regional distribution and losses of end-of-life steel throughout multiple product life cycles-Insights from the global multiregional MaTrace model.

摘要: Substantial amounts of post-consumer scrap are exported to other regions or lost during recovery and remelting, both export losses pose a constraint desires for having regionally closed material cycles. To quantify the challenges trade-offs associated with closed-loop metal recycling, we looked at cycles from perspective single unit trace through several product life Focusing on steel, used current process parameters, loss rates, trade patterns steel cycle study how that was originally contained in high quality applications such as machinery vehicles stringent purity requirements gets subsequently distributed across different groups building construction less requirements. We applied MaTrace Global, supply-driven multiregional model flows coupled dynamic stock use. found that, depending region group, up 95% consumed today will leave use phase until 2100, 50% can get obsolete stocks, landfills, slag piles 2100. The resulting business-as-usual recycling be reduced, by diverting postconsumer into long-lived buildings improving rates waste management remelting industries. Because lifetimes high-quality (cold-rolled) shorter occurs more often than infrastructure, quantified tradeoff between low cycle. Furthermore, patterns, reduced overall lead higher fractions secondary being regions. Current lifetimes, impede closure