Smelting Furnace - an overview | ScienceDirect Topics
Copper slag properties in reverberatory furnace smelting, flash smelting, and other processes are similar. A typical smelting slag contains approximately 30–45% FeO, 30–40% SiO 2 , 5–10% Al 2 O 3 , 2–6% CaO, and 2–4% MgO ( Kokal, 2006 ).