| 摘要 |
PURPOSE: A spiral tuyere for pulverized coal injection into blast furnace is provided to increase the dispersibility of pulverized coal injected into blast furnace by forming a spiral blade on the passage through which pulverized coal and hot wind are injected into blast furnace. CONSTITUTION: The spiral tuyere for pulverized coal injection into blast furnace is characterized in that a spiral blade(16) is formed on the inner circumferential surface of an injection passage(14) through which hot wind and pulverized coal are injected into the blast furnace in order to give rise to vortex in hot wind with being introduced into the blast furnace; and a cooling water passage(13) is formed at a front end part of the tuyere body(10).
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