Danieli & C. Officine Meccaniche S.p.a.

Anatoly Kolesnichenko

Alfredo Poloni

Milorad Pavlicevic

Angelico Della Negra

Fabio Guastini

Andrea Codutti

Cristina Bassi

Pavlicevic Milorad

Victoria Buryak

Anastasia Kolesnichenko

Device and corresponding method for the continuous casting of molten materials, comprising a vertical duct having the shape of a funnel made of refractory material for receiving molten material, and a second duct where the molten material is cooled off, the two ducts being set one on top of the other and being axially aligned. The molten material is injected into the channel, around a stretch of which electromagnetic means are set for generating magnetic forces on the molten material, the said means consisting of a plurality of windings of electrically conductive material and of a ferromagnetic core and may be electrically supplied to produce a magnetic flux along the direction of the channel, thus producing a set of forces acting on the molten material which are directed orthogonally with respect to the direction of the said magnetic flux so as to maintain detachment of the outer surface of the molten material from the walls of the channel.

Method and device for continuous casting of molten materials

Continuous casting device and method with rollers for plane products such as strip ( ) or sheet, comprising counter-rotating rollers ( ) immersed in a receptacle ( ) containing molten metal ( ), said receptacle ( ) including a bottom ( ) and side walls ( ), said rollers ( ) being arranged parallel and adjacent to define a transit gap ( ) through which the strip ( ) to be produced is extracted, the device comprising holding elements ( ) of the electromagnetic type arranged in cooperation with each of the ends of said rollers ( ), said holding elements ( ) having an inner edge, an outer edge and a curved shape suitable to surround, without contact, at least partly the surface of said rollers ( ) immersed in said molten metal ( ), said holding elements ( ) comprising at least a coil ( ) suitable to be passed through by an alternating current to generate a magnetic field in said molten metal ( ) and generating currents induced therein in order to obtain the lateral confinement of said molten metal ( ) in the space (&ldquo;1&rdquo;) between the relative facing inner edges of said holding elements ( ).

Continuous casting method with rollers and relative device

Method for the electromagnetic stirring of the liquid metal (14) in direct current electric arc furnaces which include a hearth (35) defined by a floor (13) and by side walls (15), a central cathode (11) cooperating with anodes (12) arranged on the floor (13) of the furnace and fed by a main current (I.sub.0), wherein there is an electromagnetic system generating a magnetic field inside the liquid metal (14) whose vertical (B.sub.z) and radial (B.sub.r) components interact respectively with the radial (J.sub.r) and vertical (J.sub.z) components of the overall current present in the liquid metal (14). The method and device use a first electromagnetic system including at least a first winding (19) through which a current (I.sub.1) flows and operating from inside the floor (13) and the walls (15) of the hearth (35), and a second electromagnetic system generating a secondary induced current (I.sub.3), between adjacent anodes (12), which circulates through the liquid metal (14). The first winding includes a plurality of spirals (20), at least some of the spirals (20) being arranged inside the refractory of the hearth (35) in cooperation with the floor (13) and with at least a vertical segment of the side walls (15).

Method for the electromagnetic stirring of the liquid metal in electric

Crystalliser for the continuous casting of billets, blooms, slabs and round bars, whether the crystalliser be of the plate type or substantially tubular, having cooled sidewalls (11) which include, in at least one longitudinal area, at least one perimeter area with electrical insulation elements (19) defining two electrically insulated ends, the sidewall of the crystalliser (10) included between the aforesaid two insulated ends having an electrical continuity, the ends being associated to electrical feed means (22) governed by a power supply system able to generate electromagnetic waves, defined and desired, interacting at least with the forming skin of the cast metal (12). Continuous casting method for billets, blooms, slabs, round bars and other products, used in a crystalliser (10) containing the cast metal (12), as shown above, at least the forming skin of the cast metal (12) inside the crystalliser (10) undergoing the action of a pulsating magnetic field generated by connecting at least two electrically insulated ends of at least one circumferential part of at least one longitudinal part of the sidewalls (11) of the crystalliser (10) to an electrical power source, the electrical power source inducing on the cast metal (12) pulsating currents of an intensity up to 150 kA.

Continuous casting method and relative crystalliser for continuous

Cooling system for electrodes (11) in D.C. electric arc furnaces, the electrodes (11) comprising a part (11a) subjected to the hot environment of the furnace, this part being made of graphite in the case of a cathode and of copper in the case of an anode, the part (11a) being associated with a metallic part (11b) by means of a joint (13) which includes inside itself a hollow (14), comprising at least in correspondence with the metallic part (11b) a cooling circuit (20) with at least a delivery channel (15), a return channel (16) and a heat exchanger (18), the circuit (20) using liquid metal as a cooling fluid, there also being included means for the forced circulation of the cooling fluid consisting of a hydromagnetic pump (17).

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Kyiv, Ukraine

Anatoly Kolesnichenko