Potential CO2 emission reduction for BF–BOF steelmaking based on optimised use of ferrous burden materials |
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| Authors: | Chuan Wang Christer Ryman Jan Dahl |
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| Institution: | 1. Division of Energy Engineering, Luleå University of Technology, SE-971 87 Luleå, Sweden;2. Centre for Process Integration in Steelmaking - PRISMA, MEFOS - Metallurgical Research Institute AB, Box 812, SE-971 25 Luleå, Sweden;1. Fraunhofer Institute for Systems and Innovation Research (ISI), Breslauer Str. 48, 76139 Karlsruhe, Germany;2. Copernicus Institute of Sustainable Development, Utrecht University, Heidelberglaan 2, 3584 CS Utrecht, The Netherlands;1. ArcelorMittal Global R&D – East Chicago Laboratories, 3001 E. Columbus Dr., East Chicago, IN, 46312, USA;2. ArcelorMittal USA Procurement and Supply Chain Management, 3300 Dickey Rd. MC 4-442, East Chicago, IN, 46312, USA;1. CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China;2. Shanghai Tech University, Shanghai 200031, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;1. Process Metallurgy Research Unit, University of Oulu, P.O. Box 4300, FI-90014 Oulu, Finland;2. Energy Engineering, Division of Energy Science, Luleå University of Technology, SE-97187 Luleå, Sweden;3. Swerea MEFOS, Process Integration Department, Box 812, SE-97125 Luleå, Sweden;4. Research Unit of Sustainable Chemistry, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland;5. Future Eco North Sweden AB, Gjutvägen 9, SE-96138 Boden, Sweden;1. Bioenergy Centre for Doctoral Training, School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, UK;2. International Institute for Applied Systems Analysis (IIASA), Schlossplatz 1, A-2631, Laxenburg, Austria;3. Swerea MEFOS, Box 812, SE-971 25, Luleå, Sweden;4. Thermal and Flow Engineering Laboratory, Åbo Akademi University, Biskopsgatan 8, FI-20500, Åbo, Finland;5. Centre for Integrated Energy Research, University of Leeds, Leeds, LS2 9JT, UK;6. Energy Engineering, Division of Energy Science, Luleå University of Technology, SE-97187, Luleå, Sweden |
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| Abstract: | Currently, the blast furnace (BF) to basic oxygen furnace (BOF) is the dominant steel production route in the steel industry. The direct CO2 emission in this process system exceeds 1 t of CO2/t of crude steel produced. Different ferrous burden materials, for instance iron ore and scrap, can be used in various proportions in this steelmaking route. This paper analyses how energy use, conversion costs, and CO2 emissions can be influenced by the use of different ferrous burden materials when producing crude steel. An optimisation mixed integer linear programming (MILP) model has been applied for analysis. By the use of the optimisation model, it is possible to highlight some issues of special importance, such as best practices to increase production at low conversion cost, or best practices to increase production at low CO2 emission. It is found out that more benefits will be gained when using the system-oriented analysis to the steelmaking process. Furthermore, a comprehensive view of the trade-offs between the objectives of Cost and CO2 can provide useful information for decision makers to generate strategies under the future emission trading. |
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