WATER COOLED BLAST FURNACE TUYERE WITH INTERNAL BURNER

摘要

A tuyere for a blast furnace comprises a water-cooled tuyere (1) and a burner (2), fitted inside the water-cooled tuyere. The burner is composed of an inner pipe (3), an intermediate pipe (4) and an outer pipe (5) which form almost a common center axis of a concentric circle. The inside of the inner pipe (3) is used for a pulverized coal path (6), an oxygen feed path (7) being in between the inner pipe (3) and the intermediate pipe (4) and a flame temperature control gas feed path (8) in between the intermediate pipe (4) and the outer pipe (5). The burner is equipped with a water-cooled jacket (9) outside the top end of the burner.