| 摘要 |
To provide a method for operating a blast furnace that allows an improvement in combustion rate of pulverized coal blown from a tuyere and a reduction in a reducing material basic unit. A method for operating a blast furnace blown from a tuyere via a lance, in which, when a blowing amount of the solid reducing material blown from the tuyere is not less than 150 kg/t per ton of pig iron, a double tube lance is used as the lance to blow the solid reducing material from an inner tube and blow oxygen of not higher than 100°C from between the inner tube and an outer tube, and pulverized coal having an average volatile matter content of more than 25 mass% and not more than 50 mass% is used as the blowing solid reducing material. |
