| 摘要 |
<p>The present invention relates to a lance injecting gas to molten iron. The lance comprises: a body extended in a longitudinal direction; a gas injection passage which is extended in a longitudinal direction, installed in the body, and allows gas to pass through the inside thereof; and a plurality of nozzles of which the ends are connected with a lower part of the gas injection passage to be connected with each other, are bent outward from the gas injection passage, and slope downward. Therefore, according to an embodiment of the present invention, the lance makes molten iron flow in a tornado or whirlwind shape by gas injected from the lance, so a metal, such as inclusion and impurity, spatters toward the lance less than that of the conventional lance. Therefore, the metal spatters in a vertical direction or an inner side wall direction of a blast furnace rather than the direction of the lance, thereby reducing metal attached and adhering to the lance as compared to the conventional lance.</p> |
