How Will Copper Contamination Constrain Future Global Steel Recycling?

Copper in steel causes metallurgical problems, but is pervasive in end-of-life scrap and cannot currently be removed commercially once in the melt. Contamination can be managed to an extent by globally trading scrap for use in tolerant applications and dilution with primary iron sources. However, the viability of long-term strategies can only be evaluated with a complete characterization of copper in the global steel system and this is presented in this paper. The copper concentration of flows along the 2008 steel supply chain is estimated from a survey of literature data and compared with estimates of the maximum concentration that can be tolerated in steel products. Estimates of final steel demand and scrap supply by sector are taken from a global stock-saturation model to determine when the amount of copper in the steel cycle will exceed that which can be tolerated. Best estimates show that quantities of copper arising from conventional scrap preparation can be managed in the global steel system until 2050 assuming perfectly coordinated trade and extensive dilution, but this strategy will become increasingly impractical. Technical and policy interventions along the supply chain are presented to close product loops before this global constraint.

[1]  D. Janke,et al.  Evaporation of Cu and Sn from Induction-stirred Iron-based Melts Treated at Reduced Pressure , 2000 .

[2]  M. Nylén,et al.  Opportunities and dangers of using residual elements in steels: a literature survey , 2006 .

[3]  I. Daigo,et al.  Outlook of the world steel cycle based on the stock and flow dynamics. , 2010, Environmental science & technology.

[4]  H. Matsuura,et al.  Removal of Copper from Molten Steel using FeO–SiO2–CaCl2 Flux , 2013 .

[5]  C. Schrade,et al.  New concepts for high-productivity RH plants , 2006 .

[6]  Kenichi Nakajima,et al.  Thermodynamic analysis for the controllability of elements in the recycling process of metals. , 2011, Environmental science & technology.

[7]  Patrik Söderholm,et al.  Steel Scrap Markets in Europe and the USA , 2008 .

[8]  Towards sustainability in ferroalloy production , 2010 .

[9]  J. O N A T H A,et al.  Options for Achieving a 50% Cut in Industrial Carbon Emissions by 2050 , 2010 .

[10]  Oba.  Wiring harnesses for Next Generation Automobiles , 2013 .

[11]  Keigo Akimoto,et al.  Long-term global availability of steel scrap , 2013 .

[12]  Shinichiro Nakamura,et al.  Quality- and dilution losses in the recycling of ferrous materials from end-of-life passenger cars: input-output analysis under explicit consideration of scrap quality. , 2012, Environmental science & technology.

[13]  J Gerrard,et al.  Is European end-of-life vehicle legislation living up to expectations? Assessing the impact of ELV Directive on "green" innovation and vehicle recovery , 2007 .

[14]  Yasunari Matsuno,et al.  Recycling of Steel , 2007 .

[15]  Mitsugu Takeuchi,et al.  Necessity of Scrap Reclamation Technologies and Present Conditions of Technical Development , 1997 .

[16]  Mario Schmidt,et al.  The Sankey Diagram in Energy and Material Flow Management , 2008 .

[17]  Jonathan M Cullen,et al.  Mapping the global flow of steel: from steelmaking to end-use goods. , 2012, Environmental science & technology.

[18]  Gareth Coates,et al.  Assessing the economics of pre-fragmentation material recovery within the UK , 2007 .

[19]  T. Nagasaka,et al.  Copper Distribution between Molten FeS-NaS0.5 Flux and Carbon Saturated Iron Melt. , 1991 .

[20]  Toshio Suzuki,et al.  A macro model for usage and recycling pattern of steel in Japan using the population balance model , 2000 .

[21]  Mohan Yellishetty,et al.  Environmental life-cycle comparisons of steel production and recycling: Sustainability issues, problems and prospects , 2011 .

[22]  Stefan Pauliuk,et al.  The roles of energy and material efficiency in meeting steel industry CO2 targets. , 2013, Environmental science & technology.

[23]  Kenichi Nakajima,et al.  Impact of the Recovery of Secondary Ferrous Materials from Alternative ELV Treatment Methods on CO2 Emission: A Waste Input Output Analysis , 2011 .

[24]  I. Daigo,et al.  Comparison of Tramp Element Contents of Steel Bars from Japan and China , 2015 .

[25]  Stefan Pauliuk,et al.  Steel all over the world: Estimating in-use stocks of iron for 200 countries , 2013 .

[26]  J. Gurell,et al.  Laser induced breakdown spectroscopy for fast elemental analysis and sorting of metallic scrap pieces using certified reference materials , 2012 .

[27]  Herbert White,et al.  End-of-life vehicles , 2014 .

[28]  A. Fråne,et al.  Material pinch analysis: a pilot study on global steel flows , 2014 .

[29]  Shigemi Kagawa,et al.  MaTrace: tracing the fate of materials over time and across products in open-loop recycling. , 2014, Environmental science & technology.

[30]  Yoshihiro Adachi,et al.  Estimation of the Change in Quality of Domestic Steel Production Affected by Steel Scrap Exports , 2007 .

[31]  Tao Wang,et al.  Moving toward the circular economy: the role of stocks in the Chinese steel cycle. , 2012, Environmental science & technology.

[32]  Shinichiro Nakamura,et al.  Regional distribution and losses of end-of-life steel throughout multiple product life cycles—Insights from the global multiregional MaTrace model , 2017, Resources, conservation, and recycling.

[33]  Shinichiro Nakamura,et al.  Unintentional Flow of Alloying Elements in Steel during Recycling of End‐of‐Life Vehicles , 2014 .

[34]  Adam J. Gesing,et al.  Assuring the continued recycling of light metals in end-of-life vehicles: A global perspective , 2004 .

[35]  Julian M. Allwood,et al.  The steel scrap age. , 2013, Environmental science & technology.

[36]  High Conductivity Coppers.  Copper Development Association , 1998 .