BLAST FURNACE OPERATION METHOD Russian patent published in 2019 - IPC C21B5/00 C21B7/16 F27B1/16 

FIELD: metallurgy.

SUBSTANCE: invention relates to blast-furnace production. Disclosed is a method of feeding into a blast furnace a hot air, solid fuel and combustible gas through tuyeres, in which hot air is fed into a blast furnace from an air duct through a tuyere, wherein double pipe is used as front nozzle for supply of solid fuel into air pipeline, solid fuel or combustible gas is supplied from inner tube of front nozzle or from gap between inner tube and outer tube and respectively supplying combustible gas or solid fuel from gap between inner tube and outer tube or from inner tube of front nozzle. Far nozzle is located downstream in the hot air supply direction from the supply end of the front nozzle and the gas supporting combustion is supplied from the far nozzle. Distance from the far nozzle to the front nozzle ranges from 27 to 80 mm.

EFFECT: improving combustion efficiency of solid fuel, increasing efficiency and reducing CO₂ emissions.

6 cl, 12 dwg