Multicriteria assessment of pre-treatment and material handling systems for improved recycling of ladle slag in electric steelmaking
Ladle Slag (LS) is a by-product of electric steelmaking that can be recycled internally in the electric arc furnace (EAF) to partially replace quicklime as a flux. However, LS cooled at ambient conditions becomes dusty and unstable, which limits the industrial uptake of this practice. A novel fast c...
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Elsevier
2025-06-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025014732 |
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| author | Matteo Lugano Damiana Chinese Marina Campolo Marco Fulgosi |
| author_facet | Matteo Lugano Damiana Chinese Marina Campolo Marco Fulgosi |
| author_sort | Matteo Lugano |
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| description | Ladle Slag (LS) is a by-product of electric steelmaking that can be recycled internally in the electric arc furnace (EAF) to partially replace quicklime as a flux. However, LS cooled at ambient conditions becomes dusty and unstable, which limits the industrial uptake of this practice. A novel fast cooling approach was recently proposed to improve LS properties, but the literature does not provide information on its viability on an industrial scale. This paper fills this gap by investigating the integration of such LS pre-treatment system into a real EAF plant recycling LS. The costs and benefits of three alternative pre-treatment and handling solutions are assessed against the baseline system without pre-treatment, using a fuzzy AHP MCDA model. The introduction of pre-treatment systems is estimated to increase annual equivalent costs by a factor of 2 to 5 and primary energy demand by a factor of approximately 4 to 7. The estimated reduction in dust emissions is in the order of 600 to 900 t/year. Considering the avoided Scope 3 emissions for quicklime production due to improved recycling, the additional carbon equivalent emissions from increased fuel and electricity consumption are offset in most configurations and savings in the order of 80-120 tCO2eq/year are estimated. The selection of material handling systems has a remarkable impact on performance. The MCDA approach identifies the most complex configuration, including a casing and automatic conveyors, as the best compromise considering environmental and economic performance as well as qualitative criteria such as occupational safety and workplace conditions. |
| format | Article |
| id | doaj-art-36c57906cb2b49a1828758e0e0981151 |
| institution | OA Journals |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-36c57906cb2b49a1828758e0e09811512025-08-20T01:57:08ZengElsevierResults in Engineering2590-12302025-06-012610540310.1016/j.rineng.2025.105403Multicriteria assessment of pre-treatment and material handling systems for improved recycling of ladle slag in electric steelmakingMatteo Lugano0Damiana Chinese1Marina Campolo2Marco Fulgosi3Dipartimento di Ingegneria e Architettura, University of Udine, Via delle Scienze 206, 33100, Udine, ItalyDipartimento di Ingegneria e Architettura, University of Udine, Via delle Scienze 206, 33100, Udine, Italy; Corresponding author.Dipartimento di Ingegneria e Architettura, University of Udine, Via delle Scienze 206, 33100, Udine, ItalyVia Ampezzo 12, 33100, Udine, ItalyLadle Slag (LS) is a by-product of electric steelmaking that can be recycled internally in the electric arc furnace (EAF) to partially replace quicklime as a flux. However, LS cooled at ambient conditions becomes dusty and unstable, which limits the industrial uptake of this practice. A novel fast cooling approach was recently proposed to improve LS properties, but the literature does not provide information on its viability on an industrial scale. This paper fills this gap by investigating the integration of such LS pre-treatment system into a real EAF plant recycling LS. The costs and benefits of three alternative pre-treatment and handling solutions are assessed against the baseline system without pre-treatment, using a fuzzy AHP MCDA model. The introduction of pre-treatment systems is estimated to increase annual equivalent costs by a factor of 2 to 5 and primary energy demand by a factor of approximately 4 to 7. The estimated reduction in dust emissions is in the order of 600 to 900 t/year. Considering the avoided Scope 3 emissions for quicklime production due to improved recycling, the additional carbon equivalent emissions from increased fuel and electricity consumption are offset in most configurations and savings in the order of 80-120 tCO2eq/year are estimated. The selection of material handling systems has a remarkable impact on performance. The MCDA approach identifies the most complex configuration, including a casing and automatic conveyors, as the best compromise considering environmental and economic performance as well as qualitative criteria such as occupational safety and workplace conditions.http://www.sciencedirect.com/science/article/pii/S2590123025014732Ladle slag managementMaterial handlingCarbon emissionsMaterial recoveryEnvironmental impactAnalytic Hierarchy Process |
| spellingShingle | Matteo Lugano Damiana Chinese Marina Campolo Marco Fulgosi Multicriteria assessment of pre-treatment and material handling systems for improved recycling of ladle slag in electric steelmaking Results in Engineering Ladle slag management Material handling Carbon emissions Material recovery Environmental impact Analytic Hierarchy Process |
| title | Multicriteria assessment of pre-treatment and material handling systems for improved recycling of ladle slag in electric steelmaking |
| title_full | Multicriteria assessment of pre-treatment and material handling systems for improved recycling of ladle slag in electric steelmaking |
| title_fullStr | Multicriteria assessment of pre-treatment and material handling systems for improved recycling of ladle slag in electric steelmaking |
| title_full_unstemmed | Multicriteria assessment of pre-treatment and material handling systems for improved recycling of ladle slag in electric steelmaking |
| title_short | Multicriteria assessment of pre-treatment and material handling systems for improved recycling of ladle slag in electric steelmaking |
| title_sort | multicriteria assessment of pre treatment and material handling systems for improved recycling of ladle slag in electric steelmaking |
| topic | Ladle slag management Material handling Carbon emissions Material recovery Environmental impact Analytic Hierarchy Process |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025014732 |
| work_keys_str_mv | AT matteolugano multicriteriaassessmentofpretreatmentandmaterialhandlingsystemsforimprovedrecyclingofladleslaginelectricsteelmaking AT damianachinese multicriteriaassessmentofpretreatmentandmaterialhandlingsystemsforimprovedrecyclingofladleslaginelectricsteelmaking AT marinacampolo multicriteriaassessmentofpretreatmentandmaterialhandlingsystemsforimprovedrecyclingofladleslaginelectricsteelmaking AT marcofulgosi multicriteriaassessmentofpretreatmentandmaterialhandlingsystemsforimprovedrecyclingofladleslaginelectricsteelmaking |