Abstract: Continuous casting method and device (10) with rolls for plane products such as strips (13), wherein counter-rotating rolls (11) are partly immersed in a container (21) containing molten metal (22), said rolls (11) being arranged parallel and adjacent to define a gap (12) through which the strip (13) to be produced is extracted upward, said strip (13) being formed by the union of two semi-skins which are formed on the respective surfaces of said rolls (11) and are joined together in correspondence with a line of contact (30), said method providing that shearing means (27), arranged substantially in cooperation with the periphery of said rolls (11), act on the sides of said strip (13) to define at least the width of said strip (13) extracted from said rolls (11).

Abstract: High speed continuous casting device and method, comprising an ingot mold provided with a crystalliser having side-walls between which the product as it cools is suitable to take shape, the product then being sent to a guide, containing and possibly pre-rolling assembly located downstream of said ingot mold and cooperating with secondary cooling means, and a system of primary cooling associated with said side-walls, the crystalliser having a longitudinal development with a radius of curvature (“R”) having a value at least five times more than the first radius of curvature of the product in the secondary cooling zone located at the outlet of said crystalliser, wherein the length (L) of the walls is more than 1050 mm, so that a progressive and gradual deformation of the product being formed is obtained which prevents tensions, inner cracks and surface lesions from forming thereon.

Abstract: Apparatus (10) to transport and cool rolled products (11) such as bars, round pieces, rods or similar, able to be arranged downstream of a coil-forming head (12), comprising a plurality of transport rollers (20), at least partly motorized and arranged parallel to each other so as to define a substantially horizontal transport plane on which said rolled products (11) arranged in coils (16) are able to lie, ventilation means (22) arranged in correspondence with said transport rollers (20) to blow air towards said rolled products (11) and conveyor means to convey towards the lateral edges of said coils (16) a greater quantity of air than that conveyed towards the central zone of said coils (16), said conveyor means comprising a plurality of elements (23), arranged at intervals between said transport rollers (20), each of said elements (23) being shaped so as to define transit channels (27) having at least a first transverse section which is greater in correspondence with the ends of said transport rollers (20) a

Abstract: Device for the continuous casting of billets, blooms, slabs and round bars, the device being associated with a crystalliser (10) containing the cast metal, the crystalliser (10) having sidewalls (11) which cooperate with cooling channels (16-24) defined by outer walls (15), the device comprising a plurality of devices located outside the sidewalls (11) of the crystalliser, the electromagnetic devices (18a, 18b, 18c) cooperating directly with the sidewalls (11) and being spaced apart longitudinally along the direction of sliding of the cast product, and fed in an independent, separate and differentiated manner from each other, the feeding being a function of the generation of a pulsating electromagnetic field in a direction substantially perpendicular to the axis of the crystalliser (10) and migrating substantially along the whole longitudinal extent of the crystalliser (10), the current pulses achieving a value of up to 100 kA.

Abstract: Method and device to obtain vibrations in the walls of the crystalliser (11) in an ingot mould (10) by use of actuators, the ingot mould (10) including a channel use (13) for the circulation of cooling liquid, the ingot mould (10) being associated with a conventional system of oscillation, there being induced on the crystalliser (11) vibrations of small amplitude and high frequency and acceleration obtained by exciting an actuator (16) comprising an element in magnetostrictive alloy (18) arranged in cooperation with at least one face of the crystalliser (11) itself, the element in magnetostrictive alloy (18) being excited by an electromagnetic field.

Abstract: System to control the surface profile of the back-up rolls in four-high rolling stands (11) to produce flat products (14), the four-high rolling stand (11) comprising working rolls (12) and back-up rolls, wherein each back-up roll (13) comprises deforming elements (18) consisting of means made of magnetostrictive material (19, 119) on which coils (20, 120) are directly wound and connected with autonomous means of electric supply to generate a magnetic field, the system comprising a control and regulation unit (24), connected with at least means (25) to control the planarity and/or thickness of the rolled product (14) leaving the rolling stand (11), for the controlled activation and feed of each of the coils generating the magnetic field (20, 120). Back-up roll for four-high rolling stands comprising means made of magnetostrictive material to achieve the control system as described above.

Abstract: Method is for welding billets leaving a heating furnace in a rolling line, the line including, in the segment (10) between the heating furnace (11) and the first rolling stand, at least a drawing unit (14), a rollerway to transport the billets, a movable welding assembly (20) with welding jaws (31) and an emergency shears (13). The trailing end of the billet (12a) being rolled is welded to the leading end of the billet (12b) unloaded afterwards from the furnace (11) while the billets (12) are in movement by a welding assembly (20) mounted on a movable trolley (19). The movable trolley (19) is taken substantially to the rolling speed, grips the billets (12) with the jaws (31) of the welding unit (20) and welds the ends of the billets (12).

Abstract: Cooling system for cathodes, or electrodes, (11) in Direct Current electric arc furnaces, the cathodes (11) comprising a lower consumable graphite part (11a), from which the electric arc is sparked, associated at the upper part with a hollow metallic part (11b) by means of a joint (13), inside the metallic part (11b) there being included a closed cooling circuit (19) with water or other similar cooling fluid, defining an area of evaporation (17) arranged substantially in cooperation with the lower end of the metallic part (11b) and an area of condensation (18) arranged in cooperation with a desired upper area of the metallic part (11b), the area of condensation (18) cooperating with a heat exchanger (15) associated with the outer wall of the metallic part (11b), there also being included an ascending channel (14) for the steam (19a) from the evaporation area (17) to the area of condensation (18) and at least a descending channel (16) whereby the condensation descends, under force of gravity, from the area of

Abstract: Method to obtain transverse vibrations of the walls (111) of the crystalliser (11) in an ingot mould (10), by a pulsation in the cooling liquid, the ingot mould (10) possibly having one or more peripheral areas (13a, 13b), disposed lengthwise, wherein the cooling liquid circulates around the sidewalls (111) of the crystalliser (11), the cooling circuit comprising a transit channel (16) directly in contact with one or more sidewalls (111) and at least a pump, a delivery pipe and a discharge pipe connected with a discharge side (21), the cooling fluid being made to circulate the pump around the sidewalls (111) of the crystalliser (11), in cooperation with at least one portion of the sidewall (111), the pressure of the cooling liquid in transit being of the pulsation type, the pulsation in the pressure being functional to the desired elastic transverse vibration induced on the portion of the sidewall (111).

Abstract: The nozzle (10) preferably, but not only, for the production of blooms, billets and conventional, medium and thin slabs, which is suitable to cooperate with a feeder for liquid steel and to discharge that liquid steel into a mould, has a discharge outlet positioned below the meniscus (20). The discharge nozzle (10) includes a first upper intake pipe (11) defining a conduit having a dimension of its cross-section equal to (S) and a nominal diameter (D), the first upper intake pipe (11) being associated at its lower end with a second introduction pipe (12), this second introduction pipe (12) possessing a nominal dimension of its internal passage having a minimum cross-section of 5S in the event of production of blooms, billets or round bars and of 4S in the event of production of conventional, medium and thin slabs.

Abstract: Discharge nozzle (10) for a crystallizer for continuous casting of slabs, which is suitable to cooperate with means feeding molten steel and to discharge that molten steel into the crystallizer (41) and has its outlet (15) positioned below the meniscus (42) and includes a first intake chamber (13) defining a conduit having a dimension of its cross-section (S) and a nominal diameter (D), that first intake chamber (13) being associated at its lower end with a second expansion chamber (12), which has a nominal dimension of its through passage having a cross-section of at least 1.2 D by 1.2 D, the second expansion chamber (12) containing at a distance (23) of at least 0.3 D from the outlet of the first intake chamber (13) an energy absorbing baffle (14), the second expansion chamber (12) having a height (26) of at least 7.0 D and an outlet (15, 115, 215)) with a wide side (28; 2.times.128; 2.times.228) of at least 4.5 D and a narrow side (32) of at least 0.