The function of hot blast furnace in iron making is to heat the blast to the required temperature to improve the efficiency and efficiency of blast furnace. When gas is burned in the combustion chamber, the high-temperature waste gas passes through the lattice brick and makes it store heat. When the lattice brick is fully heated, the hot blast stove can be changed into air supply. At this time, the relevant combustion valves are closed and the air supply valves are opened. The cold air is heated and sent out through the lattice bricks. When the blast furnace is equipped with 3-4 hot blast stoves / "single furnace air supply", two or three furnaces are heated and one blast furnace is supplied; when the blast furnace is replaced in turn / "parallel air supply", two are heated.
