Effect of EAF Slag Carryover on Slag-metal Equilibrium Calculations for Ladle Degassing Process
2009 (English)In: EPD CONGRESS 2009, PROCEEDINGS / [ed] Howard SM, 2009, 695-702 p.Conference paper (Refereed)
During the tapping of liquid steel from Electric Arc Furnace (EAF), some slag is carried over into the ladle. High levels of FeO and MnO in slag carryover increase the oxygen activity in steel melt leading to oxide inclusion formation during the ladle treatment. The demand on cleaner steels requires minimization of carryover slag. In this work, the effect of EAF slag carryover on ladle slag-steel equilibrium calculations for a hot working tool steel was studied. Steel and slag sampling were done in Uddeholm Tooling AB in Sweden. XRF and OES techniques were used to determine chemical composition of samples. The quantity of slag carryover was calculated based on a mass balance followed by thermodynamic calculations on metal-slag equilibrium using Thermo-Calc software. The agreement between predictions and experimentally determined compositions was good. This leads to the development of a prediction method for optimizing the production of other tool steel grades.
Place, publisher, year, edition, pages
2009. 695-702 p.
, EPD CONGRESS, ISSN 1079-7580
Slag carryover, Thermodynamic calculations, Tool steel, Vacuum degassing
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-31218ISI: 000264751400082ScopusID: 2-s2.0-67449139077ISBN: 978-0-87339-732-2OAI: oai:DiVA.org:kth-31218DiVA: diva2:406002
Symposium on Extraction and Processing Division held at the TMS 2009 Annual Meeting and Exhibition, San Francisco, CA, FEB 15-19, 2009
QC 201103242011-03-242011-03-112011-03-24Bibliographically approved