But increase of service life's blast furnace air supply arrangement belly pipe

The utility model provides a but increase of service life's blast furnace air supply arrangement belly pipe, the play front portion of said belly pipe is equipped with the bulb shell, adheres to the insulating refractory layer in the belly pipe, the air outlet medial extremity of said bulb shell is equipped with the recess, and the recess is the annular and distributes on the terminal surface of air outlet medial extremity, fill in the recess on the insulating refractory layer. The utility model has the advantages that: : 1, increase the area of contact of insulating refractory layer and bulb shell to the whole adhesive force of insulating refractory with the bulb shell has been increased, 2, the recess has increased the hot-blast resistance that sweeps of the anti high temperature in insulating refractory layer, has reduced the incline that insulating refractory floor height temperature was burnd, 3, the recess plays insulating refractory layer enhancement supporting role, prevents insulating refractory layer sinking and piling up at the solidification process based on above-mentioned advantage, the utility model discloses can improve the performance of belly pipe, the life of extension belly pipe