Results show that reducing the apparatus size and increasing the hot air flux can effectively increase immersed nozzle's preheatingtemperature and improve the thermal gradient on the nozzle neck.
The recuperators have high air resistance , low airpreheatingtemperature and high fan pressure head , and fan has much noise to environment and are apt to break down with vibration .
此换热器空气阻力大，空气预热温度不高，风机压头高，环境噪声大，风机振动大、易损坏。
3
The high blast temperature technology by top combustion preheating furnace preheating the intensifying combusted air is used for the hot stoves of New no. 2 and no. 3 BFs in Angang.