Abstract: A measuring method and a device are adapted for the positioning of a wheel for mash seam resistance welding in the butt-joining of steel strips on continuous processing lines. A rotary roller which is fastened to a movable frame is positioned in a measuring position. The measuring position is vertically below a reference wheel. The reference wheel is continuously vertically lowered so that its lower surface comes into contact with the rotary roller and produces a bearing force on the roller. The roller is continuously moved in the direction of lowering. A distance between an index, which is secured to a measuring arm of the frame, and an articulated column of the frame is repeatedly measured during the continuous movement. The distance is compared with a distance threshold for each of the repeated measurements until the wheel reaches a first operating position in which the distance is equal to a predefined factor of the distance threshold.

Abstract: A conveying system comprising elements for conveying lumpy, particularly hot, conveying stock and a cover for shielding the conveying stock. Disclosed are measures for inerting the conveying stock. A combined system encompasses a reduction plant for reducing oxides in a continuous process and processing unit for producing liquid metal in a discontinuous process. The reduction product is deliverable from the reduction plant to the processing unit. A method for coupling a reduction method used for reducing oxides in a continuous process and a method used for producing liquid metal in a discontinuous process. A reduction product from the reduction method is fed to the liquid metal production method for processing.

Abstract: A method produces a hardened galvanization of a continuously-running rolled steel strip. The strip is immersed in a coating tank containing a bath of a liquid metal mixture, e.g. zinc and aluminum, to be deposited on the strip, and permanently circulated between the coating tank and a preparation device. The temperature of the liquid mixture is deliberately lowered in order to reduce the iron solubility threshold and sufficiently high for initiating, in the preparation device, the fusion of at least one Zn—Al ingot in an amount necessary for compensating for the liquid mixture used for deposition on the strip. The device is implemented so that the circuit for circulating the liquid mixture is thermally optimized.

Abstract: A process for the integration of an air separation apparatus and of a steam reheat cycle is presented.

Abstract: A method for manufacturing molten iron that improves charging and discharge of the fine iron ore, and an apparatus for manufacturing molten iron using the same. The apparatus for manufacturing molten iron includes i) at least one fluidized-bed reduction reactor that reduces fine iron ore and converts the fine iron ore into reduced iron, ii) a fine iron ore charging bin that supplies the fine iron ore to the fluidized-bed reduction reactor, iii) a fine iron ore charging line that directly connects the fine iron ore charging bin to each of the fluidized-bed reduction reactors, and directly charges the fine iron ore into each of the fluidized-bed reduction reactor, iv) a melter-gasifier into which lumped carbonaceous materials and the reduced iron are charged and oxygen is injected, the melter-gasifier manufacturing molten iron, and v) a reducing gas supply line that supplies a reducing gas discharged from the melter-gasifier to the fluidized-bed reduction reactor.

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: A device for aligning the input apparatuses and the channels in a rolling stand is characterized in that it comprises: a measurement instrument (20) equipped with means (22, F, 23) for detecting the position of the surfaces of the channels (4), at least one electronic sensor (24) suitable for receiving such position detection and instrumentation for displaying the detection and its processing, and for providing the detected position.

Abstract: The pickling of a continuously running steel strip and, more particularly, a pickling method, includes centralized control of all of the pickling operations. The invention further includes an apparatus for implementing the pickling process.

Abstract: A method is provided for adjusting the thickness of the welding bead of two bands obtained by butt welding by means of a laser beam without using filler material. The bands are clamped in jaws, both cut edges being spaced apart by a reference distance. Then the mobile jaw is moved along a travel. Said travel differs from said reference distance by an offset calculated in relation to the thickness of the bands, and while taking into account the degree of accuracy of the positioning and of the cut of said edges. The offset is counted as positive or negative, in order to obtain a final welding position such that it exists, between the edges, an actual allowance, positive or negative, adapted to the thickness of the bands.

Abstract: The invention relates to a feeding device for a belt-type sintering machine, with a feeding container for receiving the material to be sintered, with a conveying device for filling the feeding container with material to be sintered, with a feeding drum and a drum chute for feeding the material to be sintered onto the sintering belt. The feeding container has two discharge openings, one of which is connected to a feeding drum and one of which is connected to a feeding chute.

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: The invention relates to a new method for managing the feeding of a new coil into a continuous inline processing plant of a band-type product, in particular for passing short coils through the production line. According to the invention, the global duration for performing the general connection process of a new coil (11?) is divided into at least two time periods (T1, T3) realized in at least two successive portions (3, 4) of the inlet section (1) of the plant and the junction cycle is broken down into two separate phases S1, S2 between which a variable band length is set aside in at least one intermediate accumulator (5) in order to provide a time interval (T2) of variable duration between said time periods of the connection process. The invention applies especially to continuous etching lines of steel bands.

Abstract: A method for guaranteeing the oxidation of a strip designed to prevent the selective oxidation of alloy elements of the steel in a continuous steel strip galvanizing annealing furnace having a pre-heating section and a hold section and provided only with radiant tubes. The oxidation of the strip is designed to prevent the selective oxidation of elements of the steel alloy. The novel method includes the following steps: installation of at least one modified tube capable of injection an oxidizing medium at least one point in the oven heating section and/or at least one point in the hold section and injection of the oxidizing medium by means of the modified tube(s), the oxidizing medium having a composition such that in the conditions of the temperature of the oxidizing medium and the steel strip and as a function of the chemical composition of the strip said medium has a dew point which guarantees an in-depth oxidation of the alloy elements of the steel strip.

Abstract: A rolling monoblock comprises: a first block (B1) of rolling stands (G1-Gm) and a second block (B2) of rolling stands (Gm+1-Gn). According to the invention, an annular path (A) of cooling of the rolled section (11) is foreseen between the two blocks (B1, B2).

Abstract: In the continuous deposition of a coating on strip-type substrate, a thickness of the coating depends on the condition of various actuators. A first preliminary phase of the process includes developing a pre-setting model, a second preliminary phase includes developing an adjustment model, an intermediate pre-setting step during which the actuators are set statically, a step of measuring the thickness of the coating, and an adjustment step during which the actuators are dynamically controlled by a predictive control based on the adjustment model in order to reduce any potential difference between the coating measured thickness and a target value of the thickness.

Abstract: A roll changing device with a steplessly operating wedge adjusting device that operates on the roll chocks of a roll that is supported 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: A weld splatter containment device for use in rolling mills includes a lower cover and an upper cover, both controllable in approaching and moving away from a welding zone so as to substantially surround the welding zone when the lower and upper covers are situated in a position close to the welding zone. The lower cover is controlled in approaching and moving away from the welding zone along a first circular trajectory portion and the upper cover is controlled in approaching and moving away from the welding zone along a second circular trajectory portion.

Abstract: A device for guiding a strip through a liquid contained in a tank, includes an immersed diverting roller, in particular a roller immersed in a bath of liquid metal such as zinc, mounted rotatably about an axis on two aligned supporting shafts extending through two respective side walls of the tank, and each rotating in a centering bearing positioned outside of the tank. Each bearing of one shaft of the roller includes two rotary supporting members mounted in a fixed housing and spaced apart from each other, namely an outer supporting member and an inner supporting member. The housing of the bearing is held against a support plane formed on the wall and perpendicular to the axis of a hole through which the shaft passes. The wall has measures for centering the housing on the axis.

Abstract: The invention concerns a method and a device for controlling the overlapping of levelling rollers in a planishing machine comprising two levelling trains each bearing a series of rollers (4, 4?) with parallel axes. The invention is 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 (3, 3?) regulating the roller overlap to maintain the value of the thus determined torque at the reference value (Refc).

Abstract: A hoisting mechanism for raising a ladle filled with liquid steel from a transfer vehicle to immersion pipes of a vacuum treatment tank of an RH degasser. Two lifting arms are provided, one end of which can be brought into engagement with a support device formed on the ladle, and a bearing end of the arms is supported in a stationary saddle support comprised in such a way of a runway, disposed on the bearing ends of the lifting arms and having the shape of a circular arc, and of a path of rolling contact, adapted to axially fixedly guide the runway during pivoting of the lifting arms, that due to shifting of the point of load introduction in the saddle support occurring during a raising movement, reduction of a horizontal movement of the ladle occurs.