Abstract: The invention relates to a roll bending device for the control of profile and flatness in the rolling of metal plates or strips. In particular the invention relates to the well known principle of roll bending by using hydraulic cylinders to modify the load distribution between rolls of a rolling mill stand and a rolled stock e.g. a metal plate or a strip in order to control the profile and flatness of the metal plate or strip. A special design to allow safe roll bending even at large roll gauges is presented. The new design allows safe operation even at large roll gauges and high side loads.

Abstract: A machine for leveling a strip of material includes a fixed supporting frame; an upper leveling device and a lower leveling device, each leveling device forming a cassette with a plurality of separated rollers, rotatably mounted on a frame of a device for rotating the rollers connected to at least some of the rollers by an extender, each extender having one end provided with a removable coupling member with one end for rotating the roller, and a device for locking each removable coupling member by clamping. The clamping locking device includes a device configure for translating the removable coupling members in the direction of travel of the material, and in the opposite direction.

Abstract: The invention relates to a method for producing a cast steel strip of preferably hot crack-sensitive or hot-brittle steel quality by means of a strip casting plant and to a strip casting plant for carrying out this method. In this case, steel melt is conducted into a melt space formed by two casting rolls and two sideplates, slab shells are formed in the melt space on cooled surface areas of the casting rolls and are brought together in the strip forming cross section between the casting rolls to form an at least partly solidified steel strip, the cast steel strip is then guided along the surface area of one of the two casting rolls from a vertical casting direction into an essentially horizontal transport direction, and the cast steel strip is supplied essentially horizontally on a transport device to a strip winding device and is wound there into a coil.

Abstract: A method and a device is provided for controlling the overlapping of leveling rollers in a planishing machine comprising two leveling trains each bearing a series of rollers with parallel axes. The method and device are particularly applicable to sheets and strip products of great thickness and high hardness requiring little roller overlap. The method is characterized in that it consists in measuring at least the overall value of the torques transmitted to the planishing rollers by the motors, in determining the actual value of the torques used for planishing the product, in comparing the determined value with the reference value of the torque provided by the presetting model and in acting on the members regulating the roller overlap to maintain the value of the thus determined torque at the reference value.

Abstract: A process and an apparatus for producing sponge iron from iron-oxide-containing material in lump form by direct reduction in a reduction shaft using a reducing gas, wherein the entire reducing gas is introduced by means of a number of reducing gas distribution ducts in a star-like arrangement or arranged parallel to one another, preferably into the lower quarter of the reduction shaft, and evenly distributed over the entire cross-section of the reduction shaft.

Abstract: An apparatus for manufacturing molten iron includes i) at least one fluidized-bed reduction reactor that converts iron ore into reduced materials by reducing and plasticizing the iron ore, ii) a melter-gasifier into which the reduced materials are charged and oxygen is injected such that the melter-gasifier manufactures molten iron, and iii) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier into the fluidized-bed reduction reactor. The fluidized-bed reduction reactor includes a gas injector that injects a gas into the fluidized-bed reduction reactor to remove stagnating layers.

Abstract: An apparatus is provided for reducing the section and sizing of rolling mill products for wire rod. The apparatus includes a first finishing monoblock made up of a plurality of rolling stands that are arranged in a sequence suitable for forming a rolling line. The apparatus also includes a second monoblock that is suitable for giving the product a round section with narrow tolerances. The second monoblock includes a sequence of stands with grooves configured to give a round-oval-round-round section to the product.

Abstract: A machine for winding a wire coming from a rolling mill into a coil, includes first means for locking a tail end of the wire and second means for containing, lifting and moving a formed coil to a binding station. The first means for locking the tail end of the wire and the second means for containing, lifting and moving the formed coil are built into a single operating unit.

Abstract: A roll changing device with a steplessly operating wedge adjusting device that operates on the roll chocks of a roll that is supported on the stand uprights and which roll is to be replaced by another in the chocks in a roll stand. The adjusting wedge has a continuously planar wedge surface area. The wedge adjusting device includes a clamping device for fixing the position of the adjusting wedge relative to a stand for the roll chocks. An upper pressure plate in the stand and above the wedge and the roll chock is vertically and horizontally guided in the roll changing device.

Abstract: The invention relates to an apparatus and a method for cropping the ends of or for separating test pieces from rolled strip wound into bundles. An apparatus is disclosed which, by means of an outwardly pivotable bottom roller (2) and guide devices (5, 6, 7, 8, 13, 14) for guiding the strip end to the shears, also makes it possible to process strips which are thicker or of greater firmness and are wound into bundles (10). Furthermore, a method is specified, which allows a reliable sampling and, if appropriate, inspection of the sample from strips wound into bundles, a closed bundle being obtained again after sampling.

Abstract: The invention relates to a control method for a mechanical-hydraulic system having a degree of freedom per hydraulic actuator which is embodied as a control path, and a measuring sensor which is used to measure the pressure ph of a hydraulic cylinder and a measuring sensor which is used to measure the position xh of the piston of the hydraulic cylinder. A control unit which can receive input variables of hydraulic pressure ph, and hydraulic actuator position xh, is provided. An observer, which determines the desired pressure of the hydraulic system and the speed vh of the hydraulic actuator, is implemented in the system. The desired pressure in the control element is taken into account in the set of rules of the control element and the speed vh of the hydraulic actuator can be over-ridden for attenuating the control element.

Abstract: A method and device for honing a metal strip of arbitrary width in continuous motion, allow honing of a suspended portion of at least one side of a metal strip, being free of artifacts and automated. The device includes a device for vertically positioning an abrasive element at the surface of the strip. A device for horizontally moving the abrasive element transversely to the motion of the strip can be coupled to the vertical-positioning device and moved back and forth from one edge of the strip to the other. A first device allows uniform pressure to be applied to press the abrasive element against the strip. The first device allows a uniform pressure to be applied to a suspended portion of the strip in motion and can be coupled to a second device allowing the pressure to be adjusted according to the longitudinal tension of the suspended portion of strip.

Abstract: A method for producing liquid pig iron or liquid steel intermediate products from fine-particled material containing iron oxide. The fine-particled material is prereduced in at least one prereduction stage and reduced in a final reduction stage to sponge iron. The sponge iron is melted in a melt-down gasification zone, with carbon carriers and oxygen-containing gas supplied. A CO- and H2-containing reduction gas is generated and introduced into the final reduction stage, is converted there, is drawn off and introduced into at least one prereduction stage, converted there and drawn off. A first quantity fraction of the fine-particled material containing iron oxide is introduced into a melt-down gasification zone via at least one prereduction stage and one final reduction stage, and a further quantity fraction of the fine-particled material containing iron oxide is introduced into the melt-down gasification zone directly or together with the carbon carriers and the oxygen-containing gas.

Abstract: A spraying method and device for a plant for rolling a strip, the plant having at least one rolling stand. The device includes: a pair of working rolls between which the strip runs; a plane perpendicular to the running direction of the strip; at least one pair of supporting rolls for the working rolls; two pairs of bearing rolls, each of the pairs having the rolls thereof substantially symmetrically arranged on either side of the working rolls in a plane substantially parallel to the strip so as to transfer, to the working rolls, a force for maintaining the working rolls in a predetermined position relative to the supporting roll; a support for the bearing rolls in the form of two rows including a plurality of bearing rollers mounted side by side; one or more nozzle systems for spraying at least a portion of the strip and at least a portion of the rolls.

Abstract: An apparatus for manufacturing molten iron includes i) at least one fluidized-bed reduction reactor that reduces and plasticizes iron ore and converts the iron ore into reduced materials, ii) a melter-gasifier into which the reduced ore is charged and oxygen is injected, the melter-gasifier manufacturing molten iron, and iii) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier to the fluidized-bed reduction reactor. The fluidized-bed reduction reactor includes a cyclone that is installed in the fluidized-bed reduction reactor to collect fine iron ore. A gas injector, which prevents the fine ore from adhering by injecting gas containing carbon, is connected to the cyclone.

Abstract: A device for rotating at least one mandrel coupled to a secondary reduction gear that can in turn be coupled to a primary reduction gear and supplies a torque to the mandrel. The primary reduction gear is driven by at least one driving motor, the primary and secondary reduction gears are mechanically similar and can be coupled via at least one torque transmission means rotated by the primary reduction gear along a rotation axis, the torque transmission means includes at least one coupling tube with two section ends. Furthermore, in the assembled configuration, the primary and secondary reduction gears define a unitary assembly integrally encapsulating the torque transmission means that can be removed from the unitary assembly in the permanent assembled configuration through an opening of the unitary assembly formed in at least one of the walls of the primary and secondary reduction gears opposite the section ends of the torque transmission means.

Abstract: A method and a device control the introduction of several metals into a cavity configured to melt the metals in the form of ingots. In particular, the method is configured to control the introduction of several metals into a cavity for melting the metals so as to dip-coat a steel strip with the metals in liquid metal form. Whereby a first metal is introduced in the form of at least a first ingot having a high content of the first metal and a second metal is introduced in the form of at least a second ingot formed as an alloy of the first metal and the second metal. The second metal content of the second ingot is chosen from a range of significant contents for ensuring an intended overall flow rate for combined melting of the ingots, the range of significant contents being chosen in a limited interval of sequentially increasing values so as to minimize differences between melting points of the ingots.

Abstract: A finishing monoblock for a billet lamination plant of the type comprises a plurality of lamination cages (G1Gn) arranged in sequence suitable for forming a lamination line and actuated by a pair of mechanical transmissions (22, 22?) actuated through at least one command reducer (23) for the lamination of the billet. According to the invention, said monoblock comprises at least one first module (M1) and a second module (M2?, M2?), of which at least one is disengageable from the lamination line through a pair of detachable joints (40).

Abstract: A method and a device for charging feedstock, in particular coke or ore, and optionally separated fines of feedstock, for processing in a metallurgical vessel, to produce metal or primary metal products. The device includes a charging mechanism, which has a conveying device and at least one feeding device for supplying to the charging mechanism. The conveying device has an outlet opening which can be guided along an inwardly directed spiral during the charging into the vessel, to set a predefined coverage in the vessel. Charged materials can thereby be positioned precisely in the vessel, and it is possible for fines to be uniformly distributed in the circumferential region.

Abstract: A machine for winding a wire from a rolling mill into a coil contains spindle with a seat for threading the head end of the wire with related binding devices. The threading seat and the binding devices are linked to an independent cover module that is coupled moveably to the spindle.