| Autor: |
Huitu, Kaisa, Helle, Mikko, Helle, Hannu, Kekkonen, Marko, Saxén, Henrik |
| Předmět: |
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| Zdroj: |
Steel Research International; May2015, Vol. 86 Issue 5, p456-465, 10p, 2 Diagrams, 1 Chart, 7 Graphs |
| Abstrakt: |
Iron and steel industry contributes by more than 5% to the global anthropogenic CO2 emissions, so new ways to reduce the emissions in this industrial sector must be found. In order to facilitate a transition to more sustainable production concepts, economic factors must be considered. The potential of using direct reduced iron from the Midrex process, based on shaft furnace technology, as a partial substitute of pellets in a blast furnace was studied in the paper. Mathematical models of the different operations in a steel plant, including the shaft furnace, form the basis of the model of the system, which was optimized by non-linear programming with respect to costs. The main objective was to analyze the prerequisites for an economically feasible operation of a steel plant integrated with a direct reduction plant under different raw material prices and varying costs of CO2 emission allowances. The results illustrate the conditions under which it would be beneficiary in a steel plant to integrate the shaft furnace in the operations. The implications of the integration on the overall CO2 emissions of the plant are also discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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