ELECTROMAGNETIC-STIRRING METHOD FOR MOLTEN STEEL IN CONTINUOUS CASTING MOLD

• Main Author: KANEYASU TAKAYUKI
• Format: Patent
• Language: English
• Published: 15.07.1997
• Edition: 6
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

PROBLEM TO BE SOLVED: To provide an electromagnetic stirring method of a molten steel in a mold which prevents the diffusion of inclusion to the lower part from the stirring part while restraining the growth of the descending flow, in a continuous caster. SOLUTION: This molten steel stirring method is the one which applies the electromagnetic force in the opposite direction along the long side walls in the mold in the continuous caster, generates circular flow in the mold and periodically changes the stirring direction for restraining the growth of the descending flow to execute the unstationary stirring. A reverse period at this time is preferred to execute in the small range having sufficiently longer than a necessary time (t1 ) to accelerate till a necessary circulating flow speed (V1 ) to secure the surface quality and shorter a time (t2 ) till reaching a lower limit value (V2 ) of the descending flow speed for securing the internal quality to made this in the stirring direction 1sec<T<10sec.