Abstract
The examination of samples of burden taken from a 75 MVA submerged-arc ferromanganese furnace showed that reduction of the ore takes place by different mechanisms, depending on the conditions prevailing in different localities in the furnace. In the higher regions of the furnace, reduction occurs mainly through carbon monoxide. Near the electrode tip, reduction takes place by dissolution of the oxide into the slag and by reduction at the interface between the slag and the reducing agent. In the molten pool underneath the electrode, reduction takes place mainly from the slag, which is in direct and intimate contact with the solid reducing agent. Similar reduction mechanisms were encountered during laboratory tests.
