Optimisation of sustainability in integrated steelmaking

• Main Authors: Ryman, Christer, Larsson, Mikael, Vikström, Liisa, Rutqvist, Staffan
• Format: Conference Object
• Language: English
• Published: Luleå tekniska universitet 2008
• Subjects: Metallurgy and Metallic Materials; Metallurgi och metalliska material; Luleå
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-29545

The complex structure of the energy and mass flows in steelmaking has resulted in many attempts to describe the process dynamics by models. Swedish steelmaker SSAB Tunnplåt is one of Europe´s leading manufacturers of high-strength strip steels. The company has orebased steel production in Luleå and strip steel manufacture in Borlänge. SSAB has a long practical experience on how to use optimisation models for planning and decision-making related to energy and material utilisation.Sustainable development is development aimed at improving the quality of life for everyone, and is a factor of increasing importance in the industry. The International Iron and Steel Institute (IISI) have suggested a number of sustainability indicators to measure economic, environmental and social performance for steelmaking. This paper exemplifies how the sustainability indicators; i) material efficiency, ii) energy intensity, and iii) greenhouse gas emissions, can be used as objectives for systematic analysis and optimisation of the industrial system. It is then possible to study possible conflicts or correlations between the different sustainability indicators. A MILP-based process integration model including cokemaking, blast furnace ironmaking, basic oxygen steelmaking, and continuous casting for the production of steel slabs has been adopted for this task. Godkänd; 2008; Bibliografisk uppgift: CD-ROM; 20081120 (chrrym)