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

FIELD: metallurgy.

SUBSTANCE: invention relates to the metallurgy, namely to the blast-furnace process. Method for feeding into a blast furnace hot air, solid fuel, gas, supporting combustion, and combustible gas through tuyeres, includes several stages, on which a double pipe is used as a front nozzle for supply of solid fuel into the air pipeline, feeding solid fuel or combustion supporting gas from inner tube of first nozzle or from gap between inner tube and outer tube, and respectively supplying combustion gas, or solid fuel from gap between inner tube and outer tube or inner tube of front nozzle. Far nozzle is located downstream in the hot air supply direction from the supplying end of the front nozzle and combustible gas is supplied from the far nozzle, in which the rate of supply of the combustible gas from the far nozzle is from 50 to 146 m/s.

EFFECT: improving combustion efficiency of solid fuel, such as coal dust, increasing efficiency and reducing CO₂ emissions.

5 cl, 12 dwg