Effect of Al<SUB>2</SUB>O<SUB>3</SUB> and MgO Additions on Liquidus for the CaO-SiO<SUB>2</SUB>-FeO<SUB>x</SUB> System at 1573K

Influence of alumina on physical properties of an industrial zinc–copper smelting slag Part 3 – melting behaviour

“…Most of the available literature in this field focuses on the liquidus surface at relatively limited compositional range, relevant to iron-and steelmaking processes. Kimura et al (2005) and Yajima et al (2010) have investigated the effects of alumina addition on the liquidus of the CaO-SiO 2 -FeO x systems at 1573 K and different partial pressures of oxygen. They have reported an enlargement of the liquid phase area due to alumina addition; however, the range of their investigated oxygen potentials and CaO contents was not applicable for zinc slag fuming processes.…”

Crystallization Control for Remediation of an FetO-Rich CaO–SiO2–Al2O3–MgO EAF Waste Slag

“…Reagent-grade powders of CaCO 3 , SiO 2 , Al 2 O 3 , MgO, and Fe t O were mixed thoroughly to form a homogeneous blend. The mixture was placed in a platinum crucible and premelted in a box furnace at 1823 K under 200 sccm Ar for 5 h, which was considered a sufficiently long period of time for the calcium carbonate to calcinate completely 22 and for the redox equilibrium of Fe t O to be achieved. 24,25 The fully melted slag was then poured onto a Cu plate that was floating on liquid N to quench and obtain adequate amounts of amorphous phase for structural analysis using Raman spectroscopy (PD-RSM300; Photon Design, Tokyo, Japan).…”