| 摘要 |
PURPOSE:To prevent the formation of a recess at the front solidified end of a steel ingot and to increase the casting speed of the ingot by cooling the central lower part of the molten metal in a heated casting mold and solidifying the central part of the ingot preferentially to the outside circumference. CONSTITUTION:A cooling body 9 is set to the center of the melt surface of the molten metal 2 in the casting mold. The body 9 is made of refractories which are not attacked by the molten metal. A gaseous cooling medium 10 such as air, nitrogen or argon or liquid cooling medium such as water is passed therein to cool continuously the molten metal in the central part of the mold. The surface temp. of the body 9 is maintained above the solidifying temp. of the casting metal to prevent the molten metal in contact with the surface of the body 9 from solidifying and forming the solidified shell on the surface of the body 9. |
