|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Applications of Process Engineering Principles in Materials Processing, Energy and Environmental Technologies: An EPD Symposium in Honor of Professor Ramana G. Reddy
||Thermodynamics of Simultaneous Desulfurization and Dephosphorizaion of SiMn Alloy
||Jong-Min Jeong, Jaehong Shin, Chul-Woo Nam, Kyung-Ho Park, Joohyun Park
|On-Site Speaker (Planned)
Because sulfur and phosphorus are very harmful in steel industries, there are increasing requirements for refining these elements from ferroalloys industries. Hence, in the present study, simultaneous desulfurization (de-S) and reducing dephosphorization (Rde-P) from silicomenganese (SiMn) alloy were investigated using metal-slag equilibration method under highly reducing condition at 1500oC. Experiments were carries out by equilibrating SiMn alloy and MnO-based slag in graphite crucible under p(O2)=10-18 atm. Slag composition was designed by changing basicity (CaO/SiO2) and MnO content with fixed Al2O3 (=20%) and MgO (=5%). Sulfur and phosphorus distribution ratio between metal and slag was exhibited as a function of basicity. De-S ratio increased with increasing basicity until C/S=1.5, whereas De-P ratio was not significantly affected by slag basicity. This is because the thermodynamic driving force of de-S reaction is greater than that of Rde-P reaction under present experimental conditions. De-S and Rde-P ratios commonly increased with decreasing oxygen partial pressure.
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