The effect of Al2O3 on liquidus temperatures of fayalite slags

The effect of alumina on the liquidus temperatures of fayalite slags at iron saturation has been investigated experimentally. Equilibrated synthetic slags were quenched, and the samples were subsequently examined using optical microscopy and electron probe microanalysis (EPMA). The isotherms in the fayalite primary field and boundary lines were determined, and the results were presented in the form of pseudo-ternary phase diagrams of “FeO”-CaO-SiO2 with 0, 2, 4, and 6 wt pct Al2O3 in the slag. The experimental results show that the alumina addition expands the fayalite primary phase field and decreases the liquidus temperatures in the fayalite primary phase field.