| 摘要 |
PURPOSE:To add inexpensively various Mg and Ca alloys into a molten iron by inserting a steel core having a bulging part at the lower part into a treating ladle, mounting a molded treating material having a hollow cylindrical shape at the lower part of the bulging part and charging the molten iron into the treating ladle while preventing said material from floating. CONSTITUTION:An Mg alloy or Ca alloy such as an Fe-Si-Mg alloy, Fe-Si-Mg- Ca alloy, Fe-Si-Mg-Ca-RE alloy, Fe-Si-Mg-RE alloy or the like is used for a molded treating material 8 which is formed into a hollow cylindrical or doughnut shape provided with a through-hole at the central part. A core steel bar 1 provided with a bulging part 2 at the lower part is inserted into a treating ladle 11 and the material 8 is mounted at the part below the bulging part 2. When a molten metal 13 to be treated is charged into the ladle 11, the material 8 adds the Mg alloy and Ca alloy into the molten metal 13 while said material is prevented from floating. |
