METHOD FOR UTILIZING COLD-AIR HEAT OF BLAST FURNACE AXIAL FLOW BLOWER, AND HOT BLAST STOVE SYSTEM

Provided is a method for utilizing cold-air heat of a blast furnace axial flow blower, involving: configuring two or more hot blast stoves (104, 204, 303) and, when using an alternating air supply method for supplying air to a blast furnace, providing heat exchange devices (1031, 1032, 302) on a hot air pipeline, thus utilizing blower (101, 201, 301) cold-air heat while simultaneously reducing the inlet air temperature of a hot blast stove presently in an air supply state, so as to extend the combustion time a hot blast stove may be in a combustion state. Additionally provided is a hot blast stove system, comprising: hot blast stoves (104, 204, 303) and a blower group, the hot blast stoves (104, 204, 303) being connected to the blower group by means of a hot air pipeline; the hot air pipeline having disposed thereon heat exchange devices (1031, 1032, 302) used for performing heat exchange with regard to air blown from blowers (101, 201, 301), so as to reduce the inlet air temperature of the hot blast stoves (