|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Real Time Imaging
||Dissolution Behavior of Non-metallic Inclusions in Refining Slag Observed Using Confocal Scanning Laser Microscopes
||Ying Ren, Lifeng Zhang, Changyu Ren
|On-Site Speaker (Planned)
The dissolution of Al2O3 and SiO2 particles in CaO-Al2O3-SiO2 slags was investigated using confocal scanning laser microscope at the steel refining temperature. It was found that the rate-limiting step was the diffusion in the molten slag. For the dissolution of Al2O3 particles in CaO-Al2O3-based slags, the higher CaO/Al2O3 ratio was beneficial to improve the inclusion removal. For the dissolution of SiO2 particles in CaO-SiO2 based slags, the increase of CaO/SiO2 and the addition of 5% Al2O3 promoted the inclusion dissolution. The higher refining temperature, the faster dissolution of Al2O3 and SiO2 particles in CaO-Al2O3-SiO2 slags. A model related to dissolution driving force and slag viscosity was proposed to predict the dissolution rate of Al2O3 and SiO2 particles in CaO-Al2O3-SiO2 slags.