Crystallization Behavior of CaO-SiO_2-MgO-Al_2O_3-Based Slags and Its Potential Application in P-Bearing Steelmaking Slags

摘要

It's well known that the CaO-SiO_2-MgO-Al_2O_3 slag system is widely applied in various industries, including ironmaking, steelmaking, glassmaking, ceramic manufacturing and construction industry. Extensive research on the structure and physical properties of this quaternary slag system has been conducted by the researchers using experimental and modeling methods for achieving the stable operation of blast furnaces, the optimal lubrication and refining abilities of high Al-containing steel mold fluxes, the selective crystallization and phase separation of valuable elements, ect. Among them, the formation of the crystal phase involved in these processes, the ratio of the crystal volume to the amorphous volume of the slag, and the morphology of the crystal phase are all particularly important. However, as far as the authors are aware, the crystallization behavior of CaO-SiO_2-MgO-Al_2O_3 slag having a wide range of Al_2O_3/SiO_2 mass ratios has not been fully understood.