Patent ID: 6438154
Filing Date: 2002-08-20
Classification: C21B,C21C,C22B,F27B,F27D,F27M,Y02P,Y02W

Abstract:
A method for processing liquid slag and baghouse dust generated by a steelmaking furnace to recover valuable metals utilizing an apparatus having a lower shell and an upper shell, said method comprising:introducing liquid slag from said furnace to a lower shell portion; introducing sand to said liquid slag; positioning said lower shell portion underneath said upper shell portion; coupling said lower shell portion to said upper shell portion to form a chamber; simultaneously adding a source of carbon to the liquid slag, adding baghouse dust to the liquid slag, and heating the liquid slag, and forming a molten metal layer in said lower shell portion with a slag layer thereon; exhausting gases from the chamber, said gases containing carbon monoxide, reduced lead vapor, and reduced zinc; decoupling said lower shell portion from said upper shell portion; and, tapping the lower shell portion, thereby removing the slag from the molten metal layer in the lower shell portion.