| 摘要 |
PURPOSE: A pulverized coal injection device is provided to prevent the backflow of hot air by automatically blocking a lance mounting part while an injection lance is drawn out. CONSTITUTION: A pulverized coal injection device comprises an injection lance(140), a lance mounting part(130), and a hot air blocking unit(150). The injection lance is mounted on a blowing pipe for injecting hot air into a blast furnace to supply pulverized coals. The lance mounting part is arranged on one side of the blowing pipe to guide the installation of the injection lance. The hot air blocking unit is arranged in the lance mounting part and is opened and closed by the movement of the injection lance.
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