钢铁回收的全球停滞和地区差异

IF 11.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Takuma Watari , Tomer Fishman , Hanspeter Wieland , Dominik Wiedenhofer
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引用次数: 0

摘要

钢铁被广泛认为是世界上可循环利用最多的材料,但关于钢铁行业在全球和全国范围内的实际循环程度的信息却很少。本研究追踪了前30个钢铁生产国的钢铁流动情况,结果表明,在过去20年里,全球炼钢的回收铁投入份额停滞在30%左右。虽然废物管理做法有所改善,但全球在用钢铁库存的迅速增长阻碍了在使钢铁流动更加循环方面取得进展。虽然一些国家的回收含量高于其他国家,从10%到90%不等,但这并不一定反映出回收实践的领先地位。相反,一些地方的高循环度往往是由其他地方的低循环度支持的,通过废料进口或“离岸”生产高质量的平板产品。只要全球钢铁库存继续增长,局部循环的改善并不一定会带来全球的进步。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Global stagnation and regional variations in steel recycling

Global stagnation and regional variations in steel recycling
Steel is widely regarded as the world's most recycled material, yet little information exists on just how circular the steel industry actually is, both globally and nationally. This study traces iron and steel flows across the top 30 steel-producing countries, showing that the share of recycled iron inputs into global steelmaking has stagnated at ∼30 % over the past two decades. Although waste management practices have improved, the rapid growth of global in-use steel stock has prevented progress in making steel flows more circular. While some countries show higher recycled content than others, ranging from <10 % to >90 %, this does not necessarily reflect leadership in recycling practices. Rather, high circularity in some places is often supported by low circularity elsewhere through scrap imports or 'offshoring' the production of high-quality flat products. As long as global steel stock continues to grow, improvements in local circularity do not necessarily lead to global progress.
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来源期刊
Resources Conservation and Recycling
Resources Conservation and Recycling 环境科学-工程:环境
CiteScore
22.90
自引率
6.10%
发文量
625
审稿时长
23 days
期刊介绍: The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.
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