• Synthetic slag consists of prepared mixture of several individual oxides which is used during secondary steelmaking to assist the steel treatment in the ladle furnace from the viewpoint of effective refinement.
• Chemical Formula : CaO Al₂O₃
• CAS NO. 65996-71-6
• Appearance : metallic grey black solid lump

Synthetic slag practice is normally used to obtain clean steels and also for the desulphurization of the liquid steel.