Abstract
Data on the temperature of tuyeres in operation, hitherto reported, were analysed to estimate some thermal properties of the tuyere and its environment.
For any material, thermal behaviors of the tuyere were theoretically discussed during the stationary blast furnace operation, as well as just after and in subsequently contacting with molten pig iron. The methods and their results are useful in searches for materials and in designing proper thickness of the tuyere.
Copper, aluminum and steel tuyere, as examples, were calculated and shown to be safely applicable to ordinary blast furnace conditions. It may be not preferable to reduce the wall thickness for preventing burning-out of copper and aluminum tuyeres.
Contrarily, a definite thickness of the wall of steel tuyere remains unmelted in contact with molten pig iron: the surface temperature of its nose wall, particularly less than 0.9 cm of thickness, cannot attain to melting point of the material.
