Method of adding the mold flux to the continuous casting in the mold

摘要

PROBLEM TO BE SOLVED: To prevent the occurrence of a defect by mold flux.;SOLUTION: The mold flux having bulk specific gravity of 1.2 g/cm³ or less is added in a casting mold 2. Here, a falling distance (an addition height) H up to a non-molten layer from a falling starting position for making the mold flux free fall is set to 250 mm or less when adding the mold flux in a state where a thickness of the non-molten layer 22 in the casting mold 2 becomes 20 mm or more and a thickness of a molten layer 23 becomes 10 mm or more. The flux falling zone area A when adding the mold flux is also set to 0.0025 m² or more, and a supply speed Q of the mold flux in a falling zone is set to 1760 kg/(m².min.) or less.;COPYRIGHT: (C)2014,JPO&INPIT