STEEL TECH

Development of high-temperature gas generator for blast furnace shaft preheating

Yoshiyuki Hagiwara - Senior General Manager - TAIYO NIPPON SANSO CORPORATION

Oxygen blast furnaces are being researched by steel manufacturers for the purpose of improving productivity and reducing CO2 emissions. Oxygen blast furnaces are operated by blowing pure oxygen through the tuyeres. Compared to conventional blast furnaces that blow in hot air, the combustion efficiency at the tuyeres is higher, and CO2 can be reduced. In addition, since pure oxygen is used, nitrogen is not included in the blown gas, so the CO2 concentration in the flue gas is high, making it easy to separate and recover CO2.
On the other hand, the amount of gas flowing through the furnace decreases, resulting in a shortage of heat in the shaft of the blast furnace. We have developed a high-temperatur gas generator that preheats blast furnace gas using oxygen combustion technology to compensate for the lack of heat in the shaft.

Share