FIELD: metallurgy.
SUBSTANCE: invention refers to the ferrous metal industry and can be used for the direct production of metals from iron oxides, dump steel-making slags, dusts and metallurgical sludge. The charge materials containing iron oxides are melted in sequentially connected fuel-oxygen skull smelting chambers. The furnace charge pre-heated in a heater is burned through continuously in one chamber with the use of a combined fuel-oxygen injection lance burner to produce a semi-finished metal. The collected semi-finished metal is poured from time to time by a chute into the second melting chamber, a smaller one, which is heated by waste gas released from the first chamber and supplied therein by a gas pipe; a portion of CO is burned up above the hot melt with oxygen from the injection lance burners, whereas a portion of the waste gas is transmitted into the furnace charge heater. In the second melting chamber, metal desulphuration, deoxidation and reduction to the required composition, as well as discharge of metal and slag cast are performed.
EFFECT: technical effect is reducing incomplete CO burning, decreasing fuel loss and improving the technical-and-economic indexes of the process.
44 cl, 2 dwg
