SYNCHRONOUS ROTATION TYPE CONTINUOUS CASTING METHOD

摘要

PURPOSE:To produce a billet having stable and high quality by comparing and operating the measured shell thickness value of a continuous casting billet and a set value with a computer and moving an electromagnetic stirrer to the optimum solidifying position of the billet according to the result of the comparison. CONSTITUTION:A molten steel is poured into a casting mold formed of a casting wheel 6 and a belt 9 and the solidified shell formed by the mold is drawn to the outside of the mold in synchronization with the wheel 6 and is straightened by a leading-out knife 13 and straightening rolls 14. The continuous casting billet 1 cooled by coolers 10, 15 are passed through an electromagnetic stirrer 17 and drawing pinch rolls 16 to a movable electromagnetic stirrer 19. The measuring data of a device 20 for measuring the shell thickness is fed to a computer for control and the stirrer 19 is moved to a desired position in the drawing direction of the billet by the signal thereof to suppress the movement of the thickened molten steel toward the central part of the billet 1. The stirrer 17 is preferably provided in the position of about 40-50% solidifying rate of the sectional area and the stirrer 19 in the position of about 60-70%.