Structure-Property Correlations of Al2O3 ⇆ SiO2 Substitution in Blast Furnace Slag

Knowledge of the structure and properties of aluminosilicate slags is of great importance in metallurgical processes. The quantitative structural information could be obtained from Raman spectra of the quenched slag samples. The relationship between the properties and structure in the CaO-MgO-SiO2-TiO2-Al2O3 system with various Al2O3/SiO2 ratio were studied in present work. Various properties such as viscosity, density, and electrical conductivity can be expected as a simple linear function of structural complexity. It is can be concluded that these physical properties are strongly dependent on the structural complexity of aluminosilicate melts. The methodology outlined in the current study can be used to predict the physicochemical properties of aluminosilicate slags when using the high alumina iron ore in ironmaking process.