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Steelmaking slags as raw material for sulphoaluminate belite cement
Cementa AB, Malmö.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
2007 (English)In: Advances in Cement Research, ISSN 0951-7197, E-ISSN 1751-7605, Vol. 19, no 4, p. 147-156Article in journal (Refereed) Published
Abstract [en]

In the present study, slags from the steelmaking industry are described and considered as a potential raw material within the field of sulphoaluminate belite cement. The objective of the study was to investigate the possibility of using a substantial amount of steelmaking slags as raw meal in the manufacture of a sulphobelitic clinker. A further aim was to compare the influence of different slags in relation to the formation of sulphoaluminate and the other clinker phases required. The behaviour of high temperature reactions was investigated by using thermogravimetric analysis coupled with a quadrupole mass spectrometer. Mineralogical observations were carried out through X-ray powder diffraction, and scanning electron microscopy. Three different mixtures and a single ladle slag were prepared using modified Bogue calculations, which are characterised by the assessment of a potential phase composition in order to produce belite-rich cement activated with sulphoaluminate. The results so far prove that steelmaking slags have the potential to be used as raw material, since sulphoaluminate along with polymorphs of dicalcium silicate and ferrite phases were detected after firing at 1200 degrees C in an air atmosphere.

Place, publisher, year, edition, pages
2007. Vol. 19, no 4, p. 147-156
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-14833DOI: 10.1680/adcr.2007.19.4.147ISI: 000249536100002Scopus ID: 2-s2.0-35348938288Local ID: e40b4340-9c12-11dc-97ff-000ea68e967bOAI: oai:DiVA.org:ltu-14833DiVA, id: diva2:987806
Note
Validerad; 2007; 20071126 (pafi)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Adolfsson, DanielMenad, NourreddineBjörkman, Bo

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