Improvement of Resistance to Slag Penetration in Magnesia-Based Refractory with Colloidal Alumina Addition II by Means of a Proper Particle Size Distribution of MgO
2016 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 47, no 3, 1858-1865 p.Article in journal (Refereed) PublishedText
By addition of colloidal alumina, three different particle sizes of dead burnt MgO were employed as raw materials to prepare MgO-based spinel substrates at 1773 K (1500 °C). It was found that the particle size of MgO, as well as its size distribution, had substantial impact on the resistance of the refractory to the slag penetration at 1873 K (1600 °C). Using relatively small particles of MgO (<0.5 mm) can efficiently limit the slag penetration, due to the formation of solid phases (CaO·Al2O3 and CaO-MgO-Al2O3) at the grain boundaries. A particularly significant improvement against the slag penetration was found on MgO substrates with a proper particle size distribution in a size range of 0-1 mm. The improvement could be mainly related to the higher density and distribution of spinel phase in the MgO matrix, which is mostly located at the borders of large MgO particles.
Place, publisher, year, edition, pages
Springer, 2016. Vol. 47, no 3, 1858-1865 p.
Alumina, Aluminum, Grain boundaries, Light transmission, Particle size, Particle size analysis, Refractory materials, Size distribution, Slags, Colloidal alumina, Different particle sizes, MgO substrate, Size ranges, Small particles, Solid phasis, Spinel phase, Magnesia
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-186955DOI: 10.1007/s11663-016-0649-2ISI: 000375451200037ScopusID: 2-s2.0-84963721567OAI: oai:DiVA.org:kth-186955DiVA: diva2:930583
QC 201605242016-05-242016-05-162016-05-30Bibliographically approved