Computational thermodynamics as a tool to study the microstructural evolution of EAF duplex stainless steelmaking slags
2012 (English)In: Ironmaking & steelmaking, ISSN 0301-9233, Vol. 39, no 1, 51-58 p.Article in journal (Refereed) Published
Computational thermodynamics was used as a tool to study and determine the microstructural evolution of the electrical arc furnace (EAF) slag during and at the end of the refining period in the production of duplex stainless steel. At all the process stages, the slag contains magnesiochromite spinels. Before FeSi addition to the furnace, the slag can also contain calcium chromite crystals. After FeSi addition, the amount of magnesiochromite spinels decreases considerably from similar to 15 to similar to 6 wt-%. In addition, dependent on the basicity and the temperature, the slag may contain solid dicalcium silicate. More specifically, during the refining stage of the EAF duplex steelmaking process, a slag basicity of > 1.55 leads to the precipitation of the dicalcium silicate phase. It has been shown that computational thermodynamics can be used as a powerful and relative reliable tool to study the slag (or slag/steel) equilibriums for different stainless steelmaking processes.
Place, publisher, year, edition, pages
2012. Vol. 39, no 1, 51-58 p.
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-33761DOI: 10.1179/1743281211Y.0000000020ISI: 000298488800008ScopusID: 2-s2.0-84255167110OAI: oai:DiVA.org:kth-33761DiVA: diva2:417303
Updated from submitted to published. QC 201201272011-05-162011-05-162012-01-27Bibliographically approved