Optimization of top gas recycling conditions under high oxygen enrichment in the blast furnace

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    Abstract

    Primary steelmaking is among the most energy intensive industrial processes in the world and being mainly coal-based it substantially contributes to the global fossil CO(2) emissions. It is therefore important to study potential ways of suppressing the use of fossil reductants and the rate of emissions in the process. This paper analyzes by simulation and optimization the concept of recycling CO(2)-stripped top gas in the blast furnace under massive oxygen enrichment, and its impact on the production economy and emissions of the steel plant. The effect of CO(2) emissions and stripping/storage costs on the optimal states is presented. The system studied is demonstrated to exhibit complex transitions between the optimal states. The findings throw light on the importance of selecting a proper state of operation for achieving a cost-efficient production of steel with reduced environmental impact.
    Original languageUndefined/Unknown
    Pages (from-to)931–938
    Number of pages8
    JournalIsij International
    Volume50
    Issue number7
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed

    Keywords

    • blast furnace
    • CO(2) emissions
    • economic optimization
    • top gas recycling

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