METHOD AND DEVICE FOR PRODUCING DIRECTLY REDUCED METAL Russian patent published in 2023 - IPC C22B5/12 C21B13/12 

FIELD: metallurgy.

SUBSTANCE: invention can be used to obtain directly reduced metal material. At stage (a) the metal material to be reduced is loaded into the space of the first furnace, at stage (b) the existing atmosphere is pumped out from the first furnace to create a vacuum inside the space of the first furnace, at stage (c) of the main heating, heat and first hydrogen gas are supplied into the space a first furnace for heating the charged metal material with the heated first hydrogen gas to a temperature sufficiently high to reduce the metal oxides present in the metal material, resulting in the formation of water vapor. At stage (d), the water vapor formed at stage (c) is condensed and collected in a condenser under the loaded metal material. The supply of the first hydrogen gas at stage (c) is carried out without recirculating the first hydrogen gas. A subsequent stage of cooling the charge material involves absorbing thermal energy from the charge material by the first hydrogen gas, and transferring thermal energy from the first hydrogen gas to a second hydrogen gas for use in a second furnace for producing metal material by heat exchange.

EFFECT: invention makes it possible to control the process of direct reduction of metal ore in a controlled hydrogen atmosphere to produce directly reduced sponge iron.

20 cl, 3 tbl, 5 dwg