Abstract: A heating device and/or method to heat a slab, and in particular its edges, by electromagnetic induction, including an electric coil and a magnetic concentrator associated with the electric coil.

Abstract: A method for containing a slab during continuous casting, including casting a slab along a casting axis, said slab having a predefined width, wherein the method provides a containment of the slab with a plurality of rolls, said rolls being disposed in pairs facing to each other, and defining a passage along the casting axis for the cast slab, wherein the plurality of rolls includes electromagnetic rolls provided with an electromagnetic stirrer which stirs the liquid contained in the slab.

Abstract: A heating device and/or method to heat a slab, and in particular its edges, by electromagnetic induction, comprising including an electric coil and a magnetic concentrator associated with the electric coil.

Abstract: Stirring roll comprising: (a) a shell ring 1 made of nonmagnetic steel in rotation of axis A-A and intended to come into contact with the surface of a large face of the cast slab (6), (b) mechanical-connection members, arranged on each side of the shell ring to support the shell ring while leaving it free to rotate axially, (c) support elements 4 which are offset on either side beyond the limits of the shell ring and fixed to the rigid frame 5 of the casting machine, (d) internal electromagnetic equipment consisting of at least one polyphase linear inductor 8 mounted coaxially with respect to the shell ring so as to leave between the two an annular space 11 through which a cooling liquid can circulate, and which constitutes an axial shaft provided with terminal extensions 20 that rest, without the ability to rotate axially, on the fixed support elements 4 and which are hollow so as to allow the passage of the cooling liquid and of the electrical connections of the inductor, and (e) inlet/outlet casings 16

Abstract: A split stirring roll including two half-rolls aligned at a distance from one another, each incorporating a polyphase linear inductor mounted fixedly a short distance from outer tubular bodies of each half-roll to arrange between them an annular space for circulation of a cooling fluid; each inductor can generate a traveling magnetic field sliding along the width of a cast slab. The two half-rolls are mounted externally in end rolling bearings and internally in a common intermediate rolling bearing attached between them, the inductors including narrowed-diameter hollow terminal portions to rest in the three rolling bearings and communicate with a cooling circuit including the annular spaces. The split stirring roll is configured for continuous casting of extra-wide slabs and can form a preferred tool for controlled electromagnetic stirring of molten metal for optimized exchange of material between a top and bottom of a casting machine.

Abstract: Four distinct polyphased inductors for a travelling magnetic field and mounted with two inductors per large side on the large sides of the ingot mold, the inductors placed side by side on a same large side of the ingot mold and producing driving forces that push the molten metal, along the width of the ingot mold, both in the same direction, which is a direction opposite to that of the driving forces produced by the two inductors placed opposite on the other large side.

Abstract: A process for continuous casting of slabs or other metal products of elongate cross section, for example made of steel, in which a molten metal is poured into a cooled mold, and the externally solidified product is continuously extracted from the mold and guided in a secondary cooling zone downstream of the mold. To obtain a cast product exhibiting predominantly equiaxed solidification, the product extracted from the mold is subjected to electromagnetic stirring in segment zero of the secondary cooling zone by at least two stirrer-rolls incorporated into the segment zero.

Abstract: In the continuous casting of flat metal products with a submerged nozzle having lateral outlets, a mold is equipped on each of its long sides with a pair of linear inductors that generate a magnetic field that travels horizontally over a width of the long sides and are placed on sides of the nozzle. The inductors are mounted in pairs to slide vertically over the height of the mold, and by being moved, pass from a low stirring position, located level with the outlets of the nozzle, to a high stirring position, located level with a meniscus of the liquid metal in the mold, and vice versa. Also, on passing from one position to the other, the connections for the inductors to the phases of the power supply are modified to reverse the direction of travel of the magnetic field of only one of the two inductors of each pair.

Abstract: Four distinct polyphased inductors (10a, 10b, 10c, 10d) for a travelling magnetic field and mounted with two inductors per large side (12, 12?) on the large sides of the ingot mould, the inductors (10a, 10b) placed side by side on a same large side (12) of the ingot mould and producing driving forces that push the molten metal, along the width of the ingot mould, both in the same direction, which is a direction opposite to that of the driving forces produced by the two inductors (10c, 10d) placed opposite on the other large side (12?), the intensity of the driving forces are adjusted in a differential manner between them such that in proximity to a large side, if there the flow of the metal is higher “towards the interior” than “towards the exterior”, greater intensities are applied to the two forces that push the metal “towards the exterior”, and conversely, if said flow is less strong “towards the interior” than “towards the exterior”, greater forces are applied to the forces that push the metal “towards th

Abstract: A process for continuous casting of slabs or other metal products of elongate cross section, for example made of steel, in which a molten metal is poured into a cooled mold, and the externally solidified product is continuously extracted from the mold and guided in a secondary cooling zone downstream of the mold. To obtain a cast product exhibiting predominantly equiaxed solidification, the product extracted from the mold is subjected to electromagnetic stirring in segment zero of the secondary cooling zone by at least two stirrer-rolls incorporated into the segment zero.

Abstract: In a mold for the continuous casting of flat metal products with a submerged nozzle having lateral outlets, said mold being equipped on each of its long sides 3 with a pair of linear inductors generating a magnetic field that travels horizontally over the width of said long side and are placed on either side of the casting nozzle 5, this method for adjusting the stirring mode is characterized: in that, since the inductors 10a to 11b are mounted in pairs so as to slide vertically over the height of the mold, said inductors, by being moved, pass from a low stirring position LP for assistance to the incoming jets of liquid metal, located level with the outlets 17 of the nozzle, to a high stirring position HP for making the cast liquid metal rotate about the casting axis, located level with the meniscus 9 of the liquid metal in the mold, and vice versa; and in that, on passing from one position to the other, the connections for the inductors to the phases of the power supply 7 are modified so as to reverse the

Abstract: The invention concerns a continuous casting ingot mold equipped with an immersed nozzle (3) provided with lateral outlets (2) opposite the small sides (5) of the ingot mold, and whereof the pattern of molten metal flows can be naturally in single loop or double loop, or even unstable. The invention is characterized in that it consists in using sliding magnetic fields acting, at the nozzle, on the flows of liquid metal reaching the ingot mold through the nozzle orifices, said magnetic fields being generated by polyphase linear electromagnetic field windings (14, 14?, 15, 15?) arranged opposite at least one side of the ingot mold on either side of the nozzle, preferably opposite one large side and advantageously both, so as to set, or stabilizes, a permanent pattern in double loop mode.

Abstract: A stirring method provides overall stirring of metal over a metallurgical length, thereby ensuring both thermal and chemical uniformity between a top and bottom of a liquid pool without correspondingly being deprived of beneficial effects specific to stirring in a mold and in a secondary cooling zone respectively, and without disturbing, but rather stabilizing, local flow mode in the mold.

Abstract: The apparatus comprises a submerged entry nozzle (6) having outlets in the main casting plane (P) which differ in their direction of output and fall within two categories (7, 8). The nozzle is associated with two inductors (14, 15) opposite each other on each broad face (22) of the casting mold forming a gap which surrounds the nozzle and produces a traversing magnetic field covering the outlets of at least one category (7). Elements are provided for adjusting the intensity of the field or for moving it so as to be able to change the distribution between the outlets of the total flow of molten metal. Implementing the invention makes it possible to adjust at any time that fraction of the metal flow which is directed toward the free surface (9) with respect to that, main, fraction directed toward the bottom of the mold.

Abstract: Both an apparatus and method are provided for electromagnetically braking a flow of molten metal during a continuous casting operation. The apparatus includes an electric electromagnetic inductor of the traveling-magnetic-field polyphase stator-type connected to a source of electrical power. The inductor is mounted on a casting plant opposite one face of the product being cast, and has two or three phase windings. The electrical power supply of the apparatus includes two or three elementary DC sources, each of which can be adjusted in terms of current intensity independent of one another. Each of the elementary electrical DC sources is connected to one, and only one of the phase windings of the inductor. The arrangement of the apparatus allows a flow of molten, ferromagnetic metal such as steel to be adjustably braked by merely adjusting the parameters of the source of electrical supply.

Abstract: A downstream connection block (GB) constituted by connector halves (FB1) is electrically connected in permanent manner to a moving assembly (EB). An upstream connection block (GA) is electrically connected in permanent manner to a stationary power supply block (BA) by flexible conductors (CA). A carriage (K) transfers the upstream block (GA) alternately between a front position (PB) providing electrical connection enabling the moving assembly to be powered, and a rear position (PA) remote from the downstream block (GB). The carriage separates from the upstream block when it is to leave said block in said front position. The invention is particularly applicable to electrically powering electromagnetic stirring inductors carried by an oscillating mold in a continuous steel casting installation.

Abstract: The product (11) is in relative motion in the direction (12) of its axis with respect to at least one magnetic inductor (10, 10'). The metallurgical product (11) is subjected to at least two magnetic fluxes (19, 19') having non-parallel directions which are transverse with respect to the longitudinal direction of the product (11). The heating device may advantageously consist of two C-shaped magnetic yokes (14, 14') spaced apart and angularly offset along the axial direction (12) of advance of the product (11).

Abstract: An electromagnetic inductor for generating a rotating field for stirring the core of a metal casting while the core is still liquid, which metal casting is to be cooled by external water circulation. The excitation winding which is to be mounted on each of its pole pieces must, prior to this, be fixed around a tubular winding support so as to form an annular winding block. The block is then fitted on the pole piece and locked thereto in reversible manner. The inductor may be used in facilities for continuous casting of steel products.

Abstract: A cooling tube (T) is incorporated into each conductor (C1) of the coil. The current carried by this conductor is divided between the strands which are maintained in thermal contact with the tube even in transposition or twist areas in which the conductor undergoes particularly marked deformations. The conductor features at least one half-turn twist between the electrical terminals of the coil.

Abstract: An electromagnetic inductor for producing a rotating magnetic field for use with an ingot mold for continuous casting of metal and provided with an apparatus for sensing the upper level of liquid metal in the mold. The inductor, of the static polyphase type, comprises an annular magnetic yoke provided with a plurality of radially inwardly projecting poles having each an exciter winding and at least two adjacent poles are spaced further in the circumferential direction of the yoke from each other than the other pole. The yoke may be provided in the region between these two poles with a cutout and beneath the cutout with a portion of increased thickness. The inductor may be used around an ingot mold for the continuous casting of metal provided with a gamma ray emitter and a gamma ray receiver located at opposite sides of the mold for detecting the position of the level of the cast liquid metal.