Some aspects of physical growth of non-metallic inclusion in ladle treatment
2007 (English)Conference paper (Refereed)
The behaviors of several types of inclusions at high temperature were examined using a laser scanning confocal microscope (1LM21H). While alumina inclusions tended to impact on each other, agglomerate and grow very quickly, none of the other types of inclusions, such as spinel and calcium aluminate was observed to agglomerate.
The results of confocal microscope study were compared with the industrial investigation. For this purpose, a huge number of steel samples were taken at different stages of ladle treatment. The samples were analyzed by scanning and light optical microscopes. About 50.000 inclusions of different types were examined. Only alumina inclusions were found to attach with each other and agglomerate. No attachment was observed in the case of the other types of inclusions. The conformity of the industrial data and the in situ observation by laser microscope indicates that while the growth of alumina inclusions needs consideration in ladle treatment, the attachment of the other types of inclusions seems not requiring special attention in process modeling and optimization.
Place, publisher, year, edition, pages
non-metallic inclusion; alumina; spinel agglomeration; confocal scanning; laser microscope
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-6821OAI: oai:DiVA.org:kth-6821DiVA: diva2:11639
METEC InSteelCon 2007, 2007, June, Dusseldorf, Germany
QC 201008032007-02-282007-02-282012-03-21Bibliographically approved