|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XIX
||D-11: CALPHAD-assisted Analyses of BOF Slag Recovery
||Han-Yu Wang, Wan-Yu Huang, Yung-Chang Liu, Kuan-Ju Lin, Shih-kang Lin
|On-Site Speaker (Planned)
Basic-oxygen furnace (BOF) slag is a byproduct during the steelmaking process, composed of high free-CaO (unreacted CaO), FeO, and P2O5 contents. BOF slag is a wasted and has been used as aggregates for road and hydraulic construction. However, free-CaO hydrolyzes with water and causes expansion and metal leaching issues. A new approach for recycling BOF slag is to apply it on construction as BF slag cement. It involves materials modification with multicomponent complex reactions at high temperatures. In this study, we employ CALPHAD modeling to design a modification and reduction processes to increase BOF slag valorization. We optimize the reaction path of BOF slag which satisfied all the criteria for low melting temperature, no solid phase precipitation and low energy consumption in order to lower the CaO, FeO, and P2O5 contents during an entire process. Reaction path in multicomponent system is thoroughly investigated and an optimized reaction path is proposed.
||Planned: Supplemental Proceedings volume