Slag‐refractory reaction during ladle refining and teeming
2009 (English)In: Steel Grips - Journal of Steel and Related Materials, ISSN 1611-4442, Vol. 7, no 2, 129-135 p.Article in journal (Other academic) Published
Refractory lining samples with slag layer were taken from used ladles at two steel plants, Ovako Steel and Uddeholm Tooling. The morphologies of the slag layers and the phases present were examined. The appearances and phases of the glaze layers were found to be somewhat different in the ladles from the two steel plants. The precipitated phases found in the refractory were 3CaO-Al2O3, MgO-Al2O3 and CaO in the case of Ovako Steel, and 3CaO-Al2O3 and 2CaO-SiO2 in the case of Uddeholm Tooling. To help the understanding, model calculations using commercial software Thermocalc were carried out. Although the model predictions differed somewhat from the experimental observation, the predicted major phases were in line with the EDS analysis on the refractory samples. Cold model study using both water and Ga-In-Sn alloy to simulate liquid steel were also performed. The results would be able to explain the thick slag line of the ladle and the serious erosion even far below the slag line. Both the slag line and the glaze layer below the slag line would be a potential source of non-metallic inclusions.
Place, publisher, year, edition, pages
2009. Vol. 7, no 2, 129-135 p.
Inclusions, refractory, ladle glaze, morphology, cold model
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-24063DOI: 10.5161/steel/2009/g02288OAI: oai:DiVA.org:kth-24063DiVA: diva2:343082
QC 20100812. QC 201201302010-08-122010-08-122012-01-30Bibliographically approved