Investigation of thermal properties of blast furnace slag to improve process energy efficiency

Sara Yasipourtehrani, Vladimir Strezov*, Sergey Bliznyukov, Tim Evans

*Corresponding author for this work

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    Blast furnace slag (BFS) is the main by-product of iron making and is produced in large amounts worldwide. To improve energy use, it is necessary to understand the thermal behaviour of slags under differing compositions at varying temperatures. This study determines the thermal properties and behaviour of selected slag samples using several experimental techniques, including high temperature Hot Stage Scanning Electron Microscopy (HS-SEM), and Computer Aided Thermal Analysis (CATA). Further methods, such as Energy Dispersive Spectroscopy (EDS) and Fourier Transfer Infrared Spectroscopy (FTIR) were applied to determine the chemical content and nature of the studied BFS samples. Comparing the chemical composition of the slags and their thermal behaviour, the effect of magnesium oxide and aluminium oxide was evident on the crystallisation and fluidity of the molten slag. Additionally, the content of silicon dioxide had an effect on the crystallisation temperature and network strength.

    Original languageEnglish
    Pages (from-to)137-145
    Number of pages9
    JournalJournal of Cleaner Production
    Volume149
    DOIs
    Publication statusPublished - 15 Apr 2017

    Keywords

    • Blast furnace slag
    • Slag viscosity
    • Slag heat exchange
    • Pig iron heating
    • Slag thermal behaviours
    • End use product value
    • High temperature hot stage SEM
    • In-situ SEM heating

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