The uneven distribution of hot blast along the tuyeres leads to a different length of the tuyere raceway, which causes a dif- ference in the discharge of the blast-furnace charge in separate sectors, and a deformed gas flow is formed along the cross section. Therefore, obtaining information on the distribution of hot blast on tuyeres is an important technological param- eter. A new technique is proposed for determining the flow rate of blast on tuyeres, based on the use of the thermal power of the flow passing through the tuyere and the value of the heat removal from this tuyere. It is shown that the distribution of hot blast on tuyeres of a blast furnace is characterized by non-uniformity and is determined by the technology of blast furnace smelting and the design of the air-feeder path. It is shown that with an uneven distribution of hot blast along the tuyeres, stabilization of the thermal state in the tuyere raceway requires an adjustment of the natural gas flow per tuyere to maintain the theoretical combustion temperatures at a given level.