| 摘要 |
PURPOSE:To make effective use of the tuyere blasting energy in the blast tuyere of a blast furnace by specifying the diameters in the inlet, center and outlet of the de Laval nozzle type tuyere. CONSTITUTION:The diameter D1 at the inlet of a blast tuyere 1 of a de Laval nozzle type for a blast furnace, the diameter D2 at the center and the diameter D3 at the outlet are regulated to D1>D2>D3 whereby the tuyere 1 is formed. The wind which is of a subsonic speed on the inlet side of the tuyere 1 attains Mach M=1 at the center and flows at a supersonic speed on the outlet side with such construction of the tuyere. An inert furnace core called ''deadman'' is narrowed according to such tuyere, and an increase in the flow rate of blast hence an increase in tapping rate are resulted from an increase in the inside volume for operation. |
