Suppressing Aluminum/Silica Exchange Reaction Between High-Aluminum Steel and Mold Flux Using Dopant Additions

The effect of dopant additions on the exchange reaction between a high-aluminum steel and mold flux was studied for the continuous casting process. Slag dopants with surface-active species obtained from CaSO4, SrSO4 and SeS2 additions were chosen to suppress the aluminum/silica exchange reaction. All dopants, at concentrations of 0.5, 1.0 and 2.5 wt.%, slowed the reaction compared to the baseline condition (without a dopant addition). Notably, SrSO4 and SeS2 at lower concentrations exhibited more effective suppression. Additionally, it was found that dopant concentrations exceeding 1.0 wt.% had no further influence on the exchange reaction for the steel grade studied.

Kuanysh Yermukhanbetov | Missouri University of Science and Technology
 

Ronald O'Malley | Missouri University of Science and Technology
 

Yijia Gu | Missouri University of Science and Technology
 

Todd Sander | Missouri University of Science and Technology
 

Darrell Sturgill | Imerys Steelcasting USA Inc.
 

Thinium Natarajan | U. S. Steel Research and Technology Center
 

Kris Phillips | Missouri University of Science and Technology
 

Matthew Nosbush | Missouri University of Science and Technology
 

Christopher Rakers | Missouri University of Science and Technology
 

Nathan Gillespie | Missouri University of Science and Technology