Estimation of the Change in Quality of Domestic Steel Production Affected by Steel Scrap Exports

Igarashi, Yuma; Daigo, Ichiro; Matsuno, Yasunari; Adachi, Yoshihiro

doi:10.2355/isijinternational.47.753

Cited by 36 publications

(26 citation statements)

References 6 publications

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“…Copper and tin are expected to accumulate in carbon steel and, in a long‐term perspective, impede the use of recycled material in its current applications, for example, in the building industry. The accumulation of copper in steel was, for instance, illustrated for Japan in Igarashi and colleagues (). Preventing the accumulation is therefore of importance for future resource use.…”

Section: Discussionmentioning

confidence: 97%

Influence of Input‐Scrap Quality on the Environmental Impact of Secondary Steel Production

Haupt

Vadenbo

Zeltner

et al. 2016

J of Industrial Ecology

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SummaryIn electric arc furnaces (EAFs), different grades of steel scrap are combined to produce the targeted carbon steel quality. The goal of this study is to assess the influence of scrap quality on the recycling process and on the final product by investigating the effect of the scrap mix composition, and other inputs, for example, preheating energy, on the electricity demand of the melting process. A large industrial data set (empirical data set of ß20,000 individual heats recorded during 2.5 years at a Swiss EAF site) is analyzed using linear regression. The influence of scrap grades on electricity demand are found to correlate strongly with their respective quality; specific electricity demand is up to 45% higher for low-quality scrap than for high-quality scrap. Given that chemical compositions of scrap grades are highly variable and often unknown, average concentrations are determined using linear regression with scrap input as the predictors and the amounts of the investigated elements in liquid steel as the dependent variable. The lowest quality (highest copper and tin concentrations) and the highest electricity demand in the EAF are found for scrap recovered from bottom ashes of municipal solid waste incineration. Although even with low-quality scrap input steel recycling is environmentally superior to primary steel production, the optimization potential in terms of energy efficiency and resource recovery, for example, through pretreatment, seems to be substantial. Keywords:electric arc furnace energy industrial ecology life cycle management recycling scrap grade Supporting information is linked to this article on the JIE website

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Section: Discussionmentioning

confidence: 97%

Influence of Input‐Scrap Quality on the Environmental Impact of Secondary Steel Production

Haupt

Vadenbo

Zeltner

et al. 2016

J of Industrial Ecology

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“…Therefore, the steel manufacturers have concentrated on R&D to ensure copper elimination. 3) In spite of the importance of this issue, few industrial ecological studies, with notable exceptions of Igarashi et al 4,5) and Nakamura and Yamasue, 6) have addressed it. The steel material cycle has been the subject of quite a few material flow analysis (MFA) studies based on the bottom-up approach.…”

Section: Introductionmentioning

confidence: 99%

Impact of the Recovery of Secondary Ferrous Materials from Alternative ELV Treatment Methods on CO2 Emission: A Waste Input Output Analysis

et al. 2011

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“…Müller 2006 ). The ability of dynamic stock models to determine future scrap supply from historic material consumption has enabled prospective modeling of mass-balanced recycling systems (Busch et al 2014 ;Hatayama et al 2009Hatayama et al , 2010Igarashi et al 2007 ;E. Müller et al 2014 ;Murakami et al 2010 ;Tanikawa et al 2002 ).…”

Section: Prospective Modeling Using Extended Dynamic Mfamentioning

confidence: 99%

Prospective Models of Society’s Future Metabolism: What Industrial Ecology Has to Contribute

Pauliuk

Hertwich

2016

Taking Stock of Industrial Ecology

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Scientifi c assessment of sustainable development strategies provides decision-makers with quantitative information about the strategies' potential effect. This assessment is often done by forward-looking or prospective computer models of society's metabolism and the natural environment. Computer models in industrial ecology (IE) have advanced rapidly over the recent years, and now, a new family of prospective models is available to study the potential effect of sustainable development strategies at full scale. We outline general principles of prospective modeling and describe the current development status of two prospective model types: extended dynamic material fl ow analysis and THEMIS (Technology-Hybridized Environmental-Economic Model with Integrated Scenarios). These models combine the high level of technological detail known from life-cycle assessment (LCA) and material fl ow analysis (MFA) with the comprehensiveness of, respectively, dynamic stock models and input/output analysis (I/O). These models are dynamic; they build future scenarios with a time horizon until 2050 and beyond. They were applied to study the potential effect of a wide spectrum of sustainable development strategies, including renewable energy supply, home weatherization, material effi ciency, and light-weighting. We point out future applications and options for model development and discuss the relation between prospective IE models and the related concept consequential LCA (CLCA). The prospective models for industrial ecology can answer questions that were previously in the exclusive domain of integrated assessment models (IAMs). A debate about the relation between the two model families is necessary.

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Estimation of the Change in Quality of Domestic Steel Production Affected by Steel Scrap Exports

Cited by 36 publications

References 6 publications

Influence of Input‐Scrap Quality on the Environmental Impact of Secondary Steel Production

Influence of Input‐Scrap Quality on the Environmental Impact of Secondary Steel Production

Impact of the Recovery of Secondary Ferrous Materials from Alternative ELV Treatment Methods on CO2 Emission: A Waste Input Output Analysis

Prospective Models of Society’s Future Metabolism: What Industrial Ecology Has to Contribute

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