DOWNWARD CONTINUOUS CASTING METHOD OF CASTING INGOT USING HEATED CASTING MOLD

摘要

PURPOSE:To prevent impurities from being captured in the central part of a casting ingot by cooling the upper part at the center of the molten metal in a heated casting mold and solidifying the central part of the casting part in preference to the outside peripheral thereby projecting the solidification end. CONSTITUTION:A cooling gas 10 is blown from a nozzle 9 for blowing the cooling gas toward the center of the molten metal surface in the casting mold. An inert gas such as argon or nitrogen or reducing gas such as carbon monoxide is used for an easily oxidizable metal such as copper alloy or iron alloy. The solidification end is projected to prevent thoroughly the generation of central segregation in the casting ingot and to increase the casting speed for the casting ingot.