Abstract: An installation for the hardened galvanization of a continuously-moving rolled steel strip, includes a coating tank receiving a liquid metal mixture containing, for example, zinc and aluminum to be deposited on the strip which is immersed in the mixture. The liquid mixture is permanently circulated between the coating tank and a preparation device, in which the temperature of the liquid mixture is deliberately lowered in order to reduce an iron solubility threshold and is sufficiently high for initiating fusion of at least one ingot containing a zinc-aluminum Zn—Al alloy in a so-called fusion zone of the preparation device, in an amount necessary to compensate for the liquid mixture used for deposition on the strip. The installation includes a loop for circulating the liquid mixture that is thermally optimized.

Abstract: An apparatus for producing hot-rolled products in a combined casting-rolling installation designed to bridge a planned or unplanned interruption in production downstream of the cutting-up and delivering device. The installation cuts off a strand portion of the continuously produced preliminary material using first shears; raises the tail part of the strand portion from the roller table using a raising device; breaks up the preliminary material passing the first shears into pieces of scrap using the first shears into pieces of scrap using the first shears; delivers the pieces of scrap and removes the strand portion unit the operational readiness of the combined casting-rolling installation is restored.

Abstract: A device for the laser weld joining of sheet metal strips includes the following elements: a main frame, a laser welding unit including a laser beam generator for welding the sheet metal strips to be joined and a welding head, a clamping jaw unit supported by the frame and used to clamp the sheet metal strips, and a shearing unit for shearing the head and tails of the sheet metal strips to be joined. The shearing unit includes upper blades mounted to a blade holder and lower blades which can move in relation to the upper blades and which are designed to shear a strip, as well as a blade connecting structure fixed to the frame, the above-mentioned welding head being mobile between the blade holder and the lower blades.

Abstract: An apparatus for producing elongated rolled products contains a steelmaking station for producing liquid metal having at a first production rate, a rolling mill having a second production rate, and a continuous casting station located between the steelmaking station and the rolling mill. The continuous casting station contains at least two casting lines, each line being operable to produce elongated intermediate products. A first casting line is directly aligned with the rolling mill to feed the rolling mill with casted products, and at least one second casting line not aligned with the rolling mill and not feeding the rolling mill. The apparatus further contains a varying device for varying simultaneously the production rate of the first casting line and the production rate of the at least one second casting line depending on a difference between the steelmaking station production rate and the rolling mill production rate.

Abstract: An apparatus for producing hot-rolled products in a combined casting-rolling installation designed to bridge a planned or unplanned interruption in production downstream of the cutting-up and delivering device. The installation cuts off a strand portion of the continuously produced preliminary material using first shears; raises the tail part of the strand portion from the roller table using a raising device; breaks up the preliminary material passing the first shears into pieces of scrap using the first shears into pieces of scrap using the first shears; delivers the pieces of scrap and removes the strand portion unit the operational readiness of the combined casting-rolling installation is restored.

Abstract: A process for energy- and emission-optimized iron production and an installation for carrying out the process. A first partial amount of a generator gas produced in a melter gasifier is used as a first reducing gas in a first reduction zone. A second partial amount is fed to at least one further reduction zone as a second reducing gas. In addition, after CO2 scrubbing, a partial amount of top gas removed from the first reduction zone is admixed with the generator gas after the latter leaves the melter gasifier, for cooling the generator gas.

Abstract: A rolling mill stand for production of rolled strip or sheet metal has working rolls which are supported on supporting rolls or on intermediate rolls and supporting rolls. The working rolls and/or intermediate rolls are arranged in the rolling mill stand so as to be displaceable axially with respect to one another. Each working and/or intermediate roll has a curved barrel contour which runs over the entire effective barrel length and can be described by a trigonometric function. The two barrel contours of adjacent rolls complete one another in a complementary way, in the unloaded state, solely in one specific relative axial position of the rolls of the pair of rolls, so that inhomogeneities in the load distribution along the contact line of two adjacent rolls are to be minimized.

Abstract: A levelling device for a strip of material contains a first cassette frame unit having a plurality of first levelling rollers with juxtaposed axes of rotation spaced by a first pitch substantially greater than a first diameter of the rollers, each of the rollers having one extremity coupled and driven individually by a motor torque transmission extender. A second cassette frame unit is interchangeable with the first cassette frame unit and contains a plurality of second levelling rollers with juxtaposed axes of rotation spaced by a second pitch substantially greater than the second diameter of the second rollers. A motor drive drives a plurality of motor torque transmission outputs to each of the extenders. The second cassette frame unit includes a torque distribution module disposed and coupled between one extremity of at least one of the extenders and at least two juxtaposed extremities of the second rollers.

Abstract: A method and a device for controlling a thermal cycle of a weld joining one end of a first strip to an end of a second strip, suited to a joining machine of a strip treatment plant. The control device includes connections intended to connect the control device to a central automation system of the strip treatment plant and to the joining machine respectively, so as respectively to allow an exchange of at least one strip data item and an exchange of at least one operating data item. A computer is capable of computing, from the strip and operating data items, at least one thermal parameter of the weld. A weld control and characterization device is capable of controlling the welding as a function of the thermal parameter.

Abstract: A method and an installation are used for inspecting a surface of a coiled metal strip, wherein the coil to be inspected is unwound along a moving plane so as to cause at least part of the strip to move to a position for inspecting the surfaces. Accordingly, the method consists in moving the part of the strip to be inspected along a substantially vertical inspection plane, between an unwinding device and a winding device arranged on two vertically spaced apart levels on either side of an intermediate inspection level. Thus, the inspection is visually performed on both surfaces of the strip by an operator moving about on a floor at the intermediate inspection level.

Abstract: A device for interchangeable connection of a casting tube to a spout of a melt vessel with a sliding closure fastened on a melt vessel. The closure is formed by at least one stationary closure plate and a closure plate that can be displaced relative thereto, wherein the displaceable closure plate is coupled to a sliding drive system and carries the casting tube. To improve the changeover process of a casting tube and to make it safer, the displaceable closure plate carries a connecting ring for the centered accommodation of the casting tube and the displaceable closure plate carries a changing device for the casting tube. The changing device is synchronously displaceable with the displaceable plate. A tensioning device presses the casting tube onto the displaceable closure plate.

Abstract: An apparatus for generating energy using sensible heat of an offgas during manufacture of molten iron and a method for generating energy using the same are provided. The method for generating energy includes i) providing an offgas discharged from an apparatus for manufacturing molten iron including a reduction reactor that provides reduced iron that is reduced from iron ore and a melter-gasifier that melts the reduced iron to manufacture molten iron; ii) converting cooling water into high pressure steam by contacting the cooling water with the offgas; and iii) generating energy from at least one steam turbine by supplying the high pressure steam to the steam turbine and rotating the steam turbine.

Abstract: A joining machine for joining ends of successive strips in a strip treatment installation includes a device welding a first end of a strip to a second end of another strip, a first pair of symmetrical clamping jaws including a first upper and a first lower clamping jaw gripping the first end of a strip, a second pair of symmetrical clamping jaws including a second upper and a second lower clamping jaw gripping the second end of a strip, the clamping jaws holding and positioning the first end facing the second end for welding the ends together. At least two clamping jaws of the two pairs each include a part for contacting one of the ends to be welded to another end. The part has a geometry and at least one constituent material reducing a strength of eddy currents likely to be created in the clamping jaw by electromagnetic induction.

Abstract: A method and installation for inspecting a butt weld of transverse ends of metal strips held together between first and second jaws along the ends, include leaving an interstice between the jaws for passage of a first transmission channel of incident waves generating ultrasound waves on one surface of the first strip and enabling passage of a second transmission channel of waves emerging from the surface of the second strip. The incident waves of the first channel are generated using laser pulses in an operating state implementing a third channel of waves generated on the surface of the first strip, passing through the weld, and emerging in the second channel. Weld inspection characteristics are identified by analyzing the operating state related to the pulses and a measurement of a signature of a vibration state of the surface of the second strip upon emergence of the waves in the second channel.

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: 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: The invention relates to an apparatus for producing metals and/or primary metal products, in particular pig iron and/or primary pig iron products, in which a metal-containing charge material, in particular in fine particle form, is introduced, using pneumatic conveying, by means of a carrier gas stream, in the form of a stream of medium formed from the charge material and the carrier gas stream, into a melting unit, in particular a melter gasifier, for further processing. According to the invention, the charge material is introduced after the carrier gas stream has been separated off and separately at at least two introduction points, so that at least two partial quantities of the charge material can be introduced independently of one another and continuously or in stacked form.

Abstract: A roll stand has two working rollers capable of gripping a strip to be rolled, two intermediate rollers, two bearing rollers, and at least one side bearing unit capable of laterally supporting the working rollers. At least one camber block for cambering the intermediate rollers is capable of vertical movement relative to the posts of the roll stand and of supporting the side bearing unit.

Abstract: In a cyclone and a method for operating a cyclone, in a duct leading to an inlet of the cyclone, at least partial separation of particles according to size takes place. A bypass arrangement diverts selected particles to the discharge duct of the cyclone. The cyclone is suitable for separating particles from blast furnace waste gases.

Abstract: In a reel furnace having a strip reeling device, the strip reeling device comprising a reel shaft, a reel drum supported on the reel shaft and at least one stirrup clamp, the reel shaft passing through a furnace wall delimiting the inner space of the reel furnace and being supported rotatably in supporting bearings outside the reel furnace, the reel drum and the at least one stirrup clamp being positioned with respect to one another by means of a connection element, and a gap for receiving a strip head being set between the reel drum and the at least one stirrup clamp. The useful life of the reel drum is appreciably increased and a strip thickness-dependent setting of the entry gap for the hot-rolled strip is ensured when the reel drum is designed as a closed body and the connection element is designed as an actuating device for fixing a specific gap width between the reel drum and the stirrup clamp and for clamping a strip head which has entered the gap.