SYSTEM FOR PRODUCTION OF DIRECT-REDUCED IRON Russian patent published in 2015 - IPC C22B13/00 

FIELD: metallurgy.

SUBSTANCE: system contains: gas reforming unit 51 with water steam supply for natural gas reforming, at that gas heater 56 is heating device for the reforming gas heating 52, produced in the gas reforming unit 51 to set temperature to produce the regenerating gas, the direct recovery furnace 13 for direct recovery of iron ore 12a to recovered iron 12b using HT recovery gas 11 containing hydrogen (H₂) and carbon monoxide (CO), acid gases removal unit 16 containing absorber 16a of acid gaseous components to remove using absorbent 15 of acid gases, acid gaseous components in flue gas 14 of recovery furnace exiting direct recovery furnace 13, and regenerator 16b for acid gases extraction; and train L₈ for injection of the extraction gas for supply of the extracted gas 14B containing carbon dioxide (CO₂) and hydrogen sulphide (H₂S) extracted from the regenerator 16b to the reforming furnace for the gas reforming reactor 51, and to furnace of gas heater 56.

EFFECT: harmful H₂S removal from extracted gas.

6 cl, 4 dwg