Techno-economic case study on Oxyfuel technology implementation in EAF steel mills – Concepts for waste heat recovery and carbon dioxide utilization

Dock, Johannes; Kienberger, Thomas

doi:10.1016/j.clet.2022.100525

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…This result is consistent with the literature sources. This type of furnace is characterized by increased efficiency compared to the Blast furnace and the ability to use electricity generated from renewable energy sources, which reduces the total amount of emissions created from the entire process [54]- [57]. A significant advantage of EAF is the ability to work not only with raw metal but also with scrap metal, which in no way affects the quality of the final product.…”

Section: Multi-criteria Decision Analysismentioning

confidence: 99%

Analysing Metal Melting Methods for Green Transformation of Scrap Metal: Case Study of Latvia using MCDA and SWOT Analysis

Terjanika,

Pubule,

Mihailova

et al. 2024

Environmental and Climate Technologies

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Metal is one of the most widely used materials in the world. It was a crucial driving force in technological development since the industrial age and continues to push us forward to this day. As metal consumption grows, so does the amount of scrap metal generated. Proper utilization of this waste is crucial in mitigating the negative environmental impacts of the metalworking industry. The processing and use of raw materials is often associated with high resource consumption and high emissions. The utilisation of scrap metal instead of raw metal can lead to up to 10 times less electricity consumption and up to 30 times fewer CO2 emissions. However, selecting the most suitable scrap metal processing technology is crucial, particularly in the case of the metal melting furnace which is the backbone of the industry. The efficiency of this process determines the environmental indicators for the entire scrap metal melting process. This paper conducts an analysis of 8 types of metal melting furnaces based on 11 environmental criteria. Furthermore, a SWOT analysis is conducted to evaluate the efficiency of the metal smelting process in Latvian metalworking enterprises and the potential for future expansion.

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Section: Multi-criteria Decision Analysismentioning

confidence: 99%

Analysing Metal Melting Methods for Green Transformation of Scrap Metal: Case Study of Latvia using MCDA and SWOT Analysis

Terjanika,

Pubule,

Mihailova

et al. 2024

Environmental and Climate Technologies

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“…Throughout secondary steelmaking, steel mill ladles are used as a transport and processing vessel. Prior to tapping of the steel melt at the electric arc furnace, they have to be preheated to more than 1000 • C. In a preceding study, the authors demonstrated that the application of Oxyfuel burners for ladle preheating rather than natural gas/air burners results in significant energy savings [6]. In Oxyfuel combustion, natural gas is burnt with oxygen, which leads to higher combustion efficiency but increases the oxygen demand in the steel mill.…”

Section: Eaf Steel Production Process and Oxygen Demandmentioning

confidence: 99%

“…The load profiles for electricity demand and for the demand for natural gas and oxygen consumed in the steel mill are obtained from an energy system model developed and extended by the authors in previous studies [6,9]. This model describes a steel mill that produces heat-treated high-alloyed steel ingots from 100% steel scrap using a 65 t alternating current (AC) EAF.…”

Section: Load Profilesmentioning

confidence: 99%

“…Additionally, the economic performance of the hydrogen scenarios (PEM and SNG) is compared based on the levelized cost of hydrogen (LCOH) and levelized cost of methane (LCOM) in EUR/MWh HHV (c H2 and c SNG ). The LCOH is obtained from Equation (6), where A CAPEX, H2 , A CAPEX, O2 , C OPEX, H2 , and C OPEX, O2 are the annual capital and operational expenditures for the oxygen and hydrogen supply equipment. c O2 represents the LCOO in the PSA scenario (see Equation ( 8)) and P H2 and P O2 are the annual hydrogen and oxygen production in MWh/a and t/a, respectively.…”

Section: Cost Modelmentioning

confidence: 99%

“…The Greenhouse Gas Protocol defines three scopes for greenhouse gas accounting [5]. According to this definition, in the EAF steel mill, direct (scope 1) CO 2 emissions occur mainly in energy-intensive by-processes such as ladle heating, annealing, and steam generation [6]. In contrast, indirect (scope 2) carbon dioxide emissions of the production process depend solely on the CO 2 intensity of the supplied electric energy.…”

Section: Introductionmentioning

confidence: 99%

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Provision of Demand-Side Flexibility through the Integration of Power-to-Gas Technologies in an Electric Steel Mill

et al. 2022

Self Cite

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EAF steelmaking based on renewable electricity allows for low-CO2 steel production. However, the increased integration of volatile renewable energies into the energy system requires the provision of flexibility options. In view of the substantial oxygen consumption in the steel mill, flexible on-site generation and storage holds a significant potential for demand-side management. The utilization of by-product oxygen from an electrolysis plant not only contributes to load flexibility but also generates a climate-neutral fuel. In the present study, different process layouts are developed based on state-of-the-art technologies. The proposed supply systems for oxygen, hydrogen, and synthetic natural gas are subjected to design and operational optimization and assessed with respect to the overall demand-side flexibility, carbon dioxide emission reduction, and economic viability.

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Klimaneutrale Elektrostahlproduktion durch Energieeffizienz und Integration Erneuerbarer Energie

Dock

Kienberger²

2022

Elektrotech. Inftech.

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Techno-economic case study on Oxyfuel technology implementation in EAF steel mills – Concepts for waste heat recovery and carbon dioxide utilization

Cited by 7 publications

References 21 publications

Analysing Metal Melting Methods for Green Transformation of Scrap Metal: Case Study of Latvia using MCDA and SWOT Analysis

Analysing Metal Melting Methods for Green Transformation of Scrap Metal: Case Study of Latvia using MCDA and SWOT Analysis

Provision of Demand-Side Flexibility through the Integration of Power-to-Gas Technologies in an Electric Steel Mill

Klimaneutrale Elektrostahlproduktion durch Energieeffizienz und Integration Erneuerbarer Energie

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