| 摘要 |
The present invention relates to an impeller for stirring molten metal comprising: an impeller body extended in a longitudinal direction; an injection nozzle prepared to penetrate a part of the lower part of the impeller body; and a blade installed in the upper part of the impeller body. According to an embodiment of the present invention, stirring flow generated by the blade and stirring flow caused by a material injected into molten metal through the injection nozzle coincide with each other, and the two flows are merged, so stirring force is generally improved. Therefore, the stirring efficiency is improved by the impeller in comparison with the conventional method, so the reaction rate between the molten metal and an additive is increased, and the refining efficiency is improved. [Reference numerals] (AA) Slag; (BB) Stirring flow due to blade rotation; (CC) Stirring flow due to gas and additives discharged from an injection nozzle; (DD) Molten iron |
