Optimization of steelmaking using Fastmet direct reduced iron in the blast furnace

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Kaisa Huitu, Hannu Helle, Mikko Helle, Marko Kekkonen, Henrik Saxén
Publication year: 2013
Journal: Isij International
Journal acronym: ISIJ INT
Volume number: 53
Issue number: 12
Start page: 2038
End page: 2046
Number of pages: 9
ISSN: 0915-1559
eISSN: 1347-5460


Steelmaking contributes by more than 5% to the world's anthropogenic CO2 emissions, so new ways to reduce the emissions in this industrial sector must be found. During a transition to more sustainable production concepts, also economic factors must be considered. In this paper the potential of using direct reduced iron (DRI) from the FASTMET process with rotary hearth furnace (RHF) technology, as a partial substitute of pellets in a blast furnace (BF) was studied. Simplified mathematical models of the different operations in a steel plant, including RHF, are combined with a more detailed model of the BF and the entire system is optimized by non-linear programming with respect to costs. The objective of the presented study is to analyze the prerequisites for an economical operation of an integrated steel plant equipped with an RHF, under different raw material prices and varying costs of CO2 emission allowances. The blast furnace operation parameters are also analyzed for different amounts of DRI charged. The results illustrate the conditions under which it would be beneficiary in a steel plant to integrate the RHF and BF technologies.


blast furnace, CO2 emissions, DRI, optimization, RHF

Last updated on 2019-24-10 at 04:17