Molten salt synthesis of compounds related to cement

Theodore Hanein, John Provis, Hajime Kinoshita, Magnus Nyberg, Nestor I Quintero-Mora, Mark Tyrer, Alan Maries

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding

    Abstract

    Producing compounds related to cement in a molten salt flux system offers a reduction in CO 2 emissions from the cement industry by allowing target compounds to be produced at lower temperatures than those in their respective conventional manufacturing processes. A thermodynamic study presented here provides the theoretical minimum formation temperature of cement related phases and infers that molten salt synthesis could potentially obviate the need for the traditionally employed “high” temperature furnaces. Laboratory experiments have been carried out to test the thermodynamic predictions. Spurrite is found to form readily in a molten salt flux, and its inherent stability may inhibit the production of other compounds in low melting point fluxed
    systems containing CaCO3 . Ferrites are also readily produced in molten salts at temperatures of ≈850°C; however, the A:F ratio varies from those found in conventional Portland cement clinkers, i.e. ≈0.3:1.7 rather than ≈1:1.
    Original languageEnglish
    Title of host publicationConcrete for the Modern Age: Developments in materials and processes, Oman 2017
    EditorsAtef Badr, Charles Fentiman, Michael Grantham, Raman Mangabhai
    Place of PublicationOman
    Publisherwhittle
    Pages205-216
    Number of pages12
    ISBN (Print)9781849953726
    Publication statusPublished - 20 Nov 2017
    EventInternational Conference on Cement and Concrete Technology - Muscat, Oman
    Duration: 20 Nov 201722 Nov 2017
    Conference number: 1
    https://www.concreteconference.org.uk/ (Link to the conference site)

    Conference

    ConferenceInternational Conference on Cement and Concrete Technology
    CountryOman
    CityMuscat
    Period20/11/1722/11/17
    Internet address

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  • Cite this

    Hanein, T., Provis, J., Kinoshita, H., Nyberg, M., Quintero-Mora, N. I., Tyrer, M., & Maries, A. (2017). Molten salt synthesis of compounds related to cement. In A. Badr, C. Fentiman, M. Grantham, & R. Mangabhai (Eds.), Concrete for the Modern Age: Developments in materials and processes, Oman 2017 (pp. 205-216). Oman: whittle.