Patent ID: 7938166
Filing Date: 2011-05-10
Classification: B22D

Abstract:
1. A method for adjusting a mode of electromagnetic stirring of liquid metal over a height of a mold having two long sides and two short sides for continuous casting of flat metal products, the method comprising: providing a submerged nozzle with lateral outlets directed towards the short sides of the mold; equipping said mold, on each of the long sides, with a pair of polyphase linear inductors that generate a magnetic field that travels horizontally over a width of said long sides; placing the pair of the inductors on each of the long sides of the nozzle such that one pair is symmetrical to another pair about a casting axis; and connecting each of the inductors to a power supply which provides coherent control of the four inductors, wherein the inductors are mounted to slide vertically over the height of the mold such that said inductors are movable between a low functional position acting at the outlets of the nozzle, in which position a direction of travel of the field is reversed between the inductors of any one pair and maintained between the two inductors facing each other on two different pairs, and a high functional position acting at a meniscus of the liquid metal in the mold, in which position the field travels in the same direction over the inductors from any one pair and in the opposite direction between the two pairs; and wherein on passing from one functional position to the other, electrical connections for the inductors to said power supply are modified to reverse the direction of travel of the magnetic field of only one of the two inductors of each pair.