The Kinetics of Oxidation of Liquid FeO-MnO-CaO-SiO2 Slags in Air
2012 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 43, no 1, 56-63 p.Article in journal (Refereed) Published
The oxidizing kinetics of the liquid FeO-MnO-CaO-SiO(2) slags in air has been studied in the temperature range of 1500 K to 1600 K (1227 A degrees C to 1327 A degrees C) by using a thermogravimetric analysis (TGA). The reaction products after oxidation were analyzed by X-ray diffraction analysis (XRD). The surface topography of the obtained samples was analyzed by scanning electron microscopy (SEM). The products after oxidation showed the presence of manganese ferrite/magnetite and calcium silicate for all the samples in the experimental temperatures range. The oxidation process was developed through the following three consequent steps: (1) incubation period followed by a chemical reaction controlled stage (2) and later (3) diffusion of oxygen through the product layer. Appropriate mathematical relationships were constructed for these steps. Combining equations corresponding to the mechanism of oxidation, the experimental results were consistently reproduced, validating thereby the theoretical analysis.
Place, publisher, year, edition, pages
2012. Vol. 43, no 1, 56-63 p.
Incubation periods, Kinetics of oxidation, Manganese ferrites, Mathematical relationship, Mechanism of oxidation, Oxidation process, Product layer, Temperature range, XRD
Materials Engineering Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-24549DOI: 10.1007/s11663-011-9576-4ISI: 000299327800006ScopusID: 2-s2.0-84861828106OAI: oai:DiVA.org:kth-24549DiVA: diva2:351730
FunderMistra - The Swedish Foundation for Strategic Environmental Research
QC 20100917. Updated from submitted to published, 201203152010-09-152010-09-152014-04-29Bibliographically approved