| 摘要 |
Provided is a method for operating a blast furnace which can improve the combustibility in the mixed combustion of a solid reducing agent and a gaseous reducing agent and can be applied also to a practical furnace by the well-defined determination of the appropriate range of the injection rate of the solid reducing agent and the gaseous reducing agent. A method for operating a blast furnace involving injecting a gaseous reducing agent as an auxiliary reducing agent and a solid reducing agent from a tuyere, which comprises injecting the gaseous reducing agent at a controlled injection rate of 10 to 80 kg/t-p and the solid reducing agent at a controlled injection rate of 50 to 150 kg/t-p.
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