In-Situ Observation of Dissolution of CaO·2Al2O3 Inclusions in CaO-SiO2-Al2O3 Slags

The dissolution of CaO·2Al2O3 inclusions in the CaO-SiO2-Al2O3 steelmaking slags has been observed using a high-temperature confocal scanning laser microscope (HT-CLSM) at different temperatures. The dissolution kinetics were quantified by analyzing HT-CLSM-captured images and measuring the change in the projected particle area with time. The obtained results showed that an increase in the temperature and CaO/Al2O3 ratio yielded an increase in the dissolution rate of CaO·2Al2O3 particle. This phenomenon is due to an increase in driving force and a decrease in the slag viscosity. Furthermore, there were no intermediate phases observed during dissolution of CaO·2Al2O3 particles using HT-CLSM.

Dr. Wanghzong Mu | KTH Royal Institute of Technology
 

Mr. Muhammad Nabeel | McMaster University
 

Mr. Andre Phillion | McMaster University
 

Dr. Neslihan Dogan | Delft University of Technology