METHOD AND APPARATUS FOR SUPPLYING BLAST TO BLAST FURNACE Russian patent published in 2018 - IPC C21B5/06 F27D17/00 

FIELD: metallurgy of iron.

SUBSTANCE: invention relates to a method and apparatus for supplying blast to a blast furnace. Apparatus for supplying blast to blast furnace (1) comprises a plurality of hot blast stoves (4, 5, 6), each stove comprising a cold blast inlet, a fuel inlet, an air supply inlet, a hot blast outlet, and one or more waste gas outlets, waste heat recovery unit (30) connected to a fuel supply for transferring recirculation top gas to a recovery unit, comprising a connecting line between the blast furnace and the recovery unit, the recovery unit being connected to the waste gas outlets of the stoves, directly connected to the fuel inlets of the stoves and is connected to the cold blast inlets of the stoves, a compressor connecting the waste gas outlets of the stoves to the cold blast inlets of the stoves, whereby the waste gas from one stove (5) is supplied through the waste heat recovery unit and the compressor as a cold blast to another stove (4).

EFFECT: invention provides a reduction in the amount of waste gas released into the atmosphere and efficient use of resources.

11 cl, 6 dwg