|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials Processing Fundamentals
||Dephosphorization Kinetics between Bloated Metal Droplet and Slag Containing FeO: The Influence of CO Bubbles on the Mass Transfer of Phosphorus in the Metal
||Kezhuan Gu, Kenneth S. Coley, Neslihan Dogan
|On-Site Speaker (Planned)
Dephosphorization behavior of Fe-C-P-S droplets reacting with slag containing FeO was investigated using X-ray fluoroscopy technique. A model based on penetration theory was proposed to investigate the effect of CO bubbles on mass transfer coefficient of phosphorus in metal. The experimental results showed that the mass transfer coefficient for phosphorus in the metal, k_m, had a higher value at lower temperature because the formation of smaller CO bubbles increased the rate of surface renewal, leading to faster mass transport. It was also showed that k_m is a linear function of CO gas velocities across the slag/metal interface. The proposed model was further tested against results from the literature over a wide range of conditions. The analysis showed that the FeO content in the slag, silicon in the metal and the experimental temperature have strong impact on, k_m, almost entirely because of their effect on decarburization behaviour.
||Planned: None Selected