HEATING DEVICE Russian patent published in 2016 - IPC C21B9/00 

FIELD: heating.

SUBSTANCE: invention relates to metallurgy, in particular to the heating device of the blast-furnace air heater. The device includes a fuel source with a low heat value, the first pipeline to supply fuel with the low heat value to the combustion zone of the air heater, an air source, the second pipeline for air supply to the combustion zone of the air heater, a source of an oxidant containing at least 85 %vol. of oxygen, the third pipeline for the oxidant supply to the combustion zone of the air heater, the forth pipeline connected with flue gases exhaust of the air heater to remove the flue gases from the air heater, and the fifth pipeline made with a possibility of the flue gases recirculation to the combustion zone.

EFFECT: invention ensures the reduced quantity of coke, converter or natural gas to ensure a required temperature.

7 cl, 3 dwg, 2 tbl