CONTROLLING METHOD OF HEATING MOLTEN METAL IN TUNDISH

• Main Authors: NOZAKI TSUTOMU, UEDA NORIHIRO, YOSHII YUTAKA, KINOSHITA KATSUO, KAKIO YASUHIRO
• Format: Patent
• Language: English
• Published: 08.09.1984
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

PURPOSE:To prevent the decrease in the temp. of a molten metal without pinching by charging and heating the molten metal in the large quantity in excess of heat absorption and radiation in the initial period of charging the molten metal into a tundish then charging and heating the molten metal so as to compensate the heat absorption and radiation. CONSTITUTION:The charging flow rate of a molten metal to be accepted in a tundish from a transporting ladle, etc. is regulated to >=3t/min in the initial period of charging and is increased according to the capacity of the tundish. The quantity of the electric power to be thrown to an electromagnetic induction heater for compensating the decrease in the temp. of the molten metal in the tundish is controlled. More specifically, the quantity of the electric power to be thrown when a reference level is attained is designated as 100% and the quantity of the electric power to be thrown is controlled to 20-30% until 35% of the reference level is attained and 50-65% until 70% is attained so that the continued flow of the molten metal in the bypassing route of the heater is assured. The electric power below the max. power is thrown after the reference level is attained so that the decrease in the temp. of the molten metal is prevented.