Abstract: In a method for the production of molten metal, oxygen, a reducing agent and iron reduced in a reduction reactor are introduced into a melt gasifier, the reducing agent is gasified with oxygen and the reduced iron is melted by the heat which occurs, the cupola gas being used as at least a fraction of the reduction gas. Reacted top gas is drawn off from the reduction reactor. For increased efficiency at least part of the heat energy of the top gas and/or of the fraction of the reduction gas which is provided for use as cooling gas and as excess gas to be utilized for the indirect heating of at least one further gas used in the method.

Abstract: A method and an apparatus for the production and the melting of liquid pig iron or of liquid steel intermediate products in a melt-down gasifier, with the introduction of oxygen-containing gas streams through oxygen nozzles into the solid bed. At least one oxygen nozzle has a single gas supply and introduces at least two gas streams. Using plural gas streams from a nozzle reduces the risk of fluidization of the solid bed because the number of gas raceways in materials in the gasifier is increased.

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 that is vertically below a reference wheel. The reference wheel is lowered vertically to come into contact and bear on the rotary roller. A distance between an index on a measuring arm of the frame and an articulated column is repeatedly measured during the continuous lowering movement of the roller. The distance is compared with a distance threshold for each of the repeated measurements until the wheel reaches a first operating position where the distance equals a predefined distance threshold factor. The first operating position is recorded as a reference point in a system for the vertical movement of the reference wheel.

Abstract: In a process for granulating slag, from a blast furnace or a smelting reduction plant, in which a granule/water mixture formed during the granulation is fed to a granulation tank and then to a dewatering installation, in which the slag granules are dewatered. H2S-containing vapors and gases formed during the granulation are at least partially condensed by injection of water in a condensation space which is flow-connected to the granulation tank. H2S-containing residual gases are discharged from the compensation space below the water injection point, H2S is burnt.

Abstract: Equipment and a method for preheating a continuously moving steel strip, in particular before feeding the same into a continuous annealing or hot-dip galvanizing furnace, involves the continuous movement of the steel strip in a preheating chamber including a preheating circuit having at least one preheating tube, the inner surface of which is in contact with externally-recovered burnt gases (e.g. from the furnace). A portion of the outer surface of the preheating tube is disposed directly opposite a surface of the strip in order to provide a first preheating mode by irradiating heat onto the strip and the walls of the chamber, and a second preheating mode, mainly by convection, of a gas constituting a controlled atmosphere in the preheating chamber.

Abstract: A method for the melting of pig iron in a blast furnace (1) operated with oxygen or in a melt-reduction plant, with a reduction region. Purified crude gas is discharged from the reduction region and is recirculated into the reduction region with the addition of hydrocarbons. The purified crude gas is mixed with hydrocarbons and is also blended with a reduction gas which has a temperature of above 1000° C. and which is generated by partial oxidation of hydrocarbons by means of oxygen gas having an oxygen content of above 90% by volume, in order to form a recirculation gas with a temperature of above 800° C. The recirculation gas is recirculated into the reduction region according to an auto-reforming process.

Abstract: A method and an apparatus for producing hot-rolled products in a combined casting-rolling installation. A method and a combined casting-rolling installation with which an uninterrupted continuous casting process can be maintained not only when there is a planned interruption to production but also when there is an unplanned interruption to production, occurring for example in a heating zone, a finishing mill train, a cooling zone or a storage device.

Abstract: A plant for the production of ore comprising a proportion of fines, additives and green agglomerates optionally containing a binder, provided with an outer coating consisting of a combustible containing fine-grained carbon, such as coke. In the plant, the ore is mixed with the additives and the optionally available binder. The mixture is pelletized and the green agglomerates thus formed are coated with the combustible, whereby the combustible is introduced into an agglomeration drum. In order to enable continual production of homogeneous-quality green agglomerates, the mixture is pelletized in the agglomeration drum and the combustible is added in an area of the longitudinal extension of the agglomeration drum where the size of the green agglomerates formed in the agglomeration drum is sufficient for further processing.

Abstract: A coiler furnace having a heat-insulated enclosure delimiting a furnace interior, a strip coiling device includes a coiler drum having a slotted receiving opening for the hot-rolled strip in the furnace interior, A controlled rotational drive for a coiler shaft is located outside the furnace interior. An inlet and outlet opening to the enclosure for a hot-rolled strip. A strip guiding device between a roller table and the coiler drum. In order to avoid any winding errors, a feeding shield extends through the enclosure of the coiler furnace and is coupled to a displacement drive arranged outside the furnace interior. The displacement drive can be displaced between an insertion position and a withdrawal position of the shield. The feeding shield, in the insertion position, interacts with the strip guiding device to form a feed funnel, mounted upstream the slotted receiving opening on the coiler drum for the hot-rolled strip together.

Abstract: The invention relates to a process and an associated 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 distributor bottom, particularly a nozzle-type distributor bottom, for steadily introducing process gas, especially process gas loaded with solid particles, into a process chamber, optionally to create a fluidized bed. The process chamber is disposed above the distributor bottom and is formed by walls of a reactor used for metallurgically, particularly thermally, treating feedstock. The distributor bottom is provided with a plurality of holes. Holes are arranged near the walls to prevent substances from attaching to the reactor walls. Special arrangements relate to nozzles and ducts.

Abstract: A machine for leveling a strip of material contains a lower stationary back plate from which extends vertical beams located on either side of a longitudinal axis. A lower stationary leveling chassis and an upper leveling chassis are provided. Each chassis contains spaced apart rollers. An upper stationary back plate is rigidly secured to the upper end of each beam, and a moving coupling device couples the upper leveling chassis to the upper back plate. A device allows a vertical translational movement of the upper leveling chassis in relation to the upper stationary back plate between a rest position where the rollers of the upper leveling chassis are moved away from rollers of the lower leveling chassis and a leveling position where rollers of the upper leveling chassis are moved towards rollers of the lower leveling chassis and the strip is forced to travel along an undulating path.

Abstract: In a process and apparatus for the reduction of metal oxides to form metalized material by contact with hot reducing gas, which is produced at least partially by catalytic reformation of a mixture of—a gas containing carbon dioxide (CO2) and/or steam (H2O) with—gaseous hydrocarbons, the fuel gas for burners which provide the heat for the endothermal reformation processes which take place during the reformation is obtained at least partially from a partial quantity of the top gas produced during the reduction of metal oxides to form metalized material, wherein this partial quantity of the top gas, before it is used as a component of the fuel gas, is firstly subjected to dedusting and then to a CO conversion reaction, and the conversion gas obtained during the CO conversion reaction is subjected to CO2 removal after cooling.

Abstract: In order to be able to carry out a multiplicity of continuously recurring activities at a continuous casting plant having at least one multifunction robot for implementing a plurality of different process-controlled or automated interventions at the continuous casting plant, at least one working region at the continuous casting plant and at least one multifunction robot assigned to each working region. The multifunction robot is arranged on a pivotable arm at a rotary column fastened to the pouring platform of the continuous casting plant and the robot can be pivoted with the pivot arm between a retraction position and a working position. The robot is also movable with respect to its arm.

Abstract: In a method to replace a pair of rolls of a rolling mill stand during a downtime period, worn rolls fitted with chocks are extracted from the mill stand and positioned on means of displacement that bear a pair of new rolls without chocks. The method sets the means of displacement in motion so that the worn rolls are aligned with a chock extraction device. The chock extraction device is used to remove the chocks from the worn rolls. The means of displacement are actuated so that new rolls are now aligned with the chock extraction device. The chock extraction device is used to reinstall, on the new rolls, the chocks. After the new rolls have been fitted with the chocks, the new rolls are inserted in the mill stand so that the downtime period is reduced and the number of chocks in service is likewise reduced.

Abstract: Disclosed is a composite system that includes a reduction system for reducing oxides in a continuous process, a process assembly for manufacturing liquid metal in a discontinuous process, wherein a reduction product is fed from the reduction system to the process assembly, at least one buffer device for receiving the reduction product and further starting materials and also for charging the process assembly, and a conveyor system for transporting the reduction product from the reduction system into the at least one buffer device.

Abstract: A bending device for two working rolls of a rolling stand. Guide blocks provided in lateral roll housings for guiding two pressure-transmission bodies vertically adjustably with respect to each other and, on which the working rolls are supported via chocks. Bending cylinders are arranged in pairs between the pressure-transmission bodies at each end of the rolls. Each cylinder has a piston rod acting on one pressure-transmission body and a cylinder at the respective other pressure-transmission body. Each pressure-transmission body is supported on a respective guide block in a sliding manner. So that loads acting on the pressure-transmission bodies can be introduced into the guide block free of edge pressure, the pressure-transmission bodies are supported on the respective guide blocks in a sliding manner by self-adjusting wearing plates which include surfaces that enable both sliding and pivoting of the bodies with respect to the guide blocks.

Abstract: The invention relates to a method and a device for the coarse separation of solid particles from solid-laden gases. The invention further relates to a method for treating particulate feed materials by means of treatment gases in a reactor, particularly in a fluidization zone at an increased temperature. Due to a blind hole-like line extension, it is possible to separate solid particles from a solid-laden gas.

Abstract: A device for turning over a flattening element having a plurality of spaced-apart cylinders rotatably mounted on a frame and a device for securing it to the turning-over device, includes two uprights extending vertically from a base. A supporting and securing device for the flattening element engages with the securing device of the flattening element. The supporting and securing device is disposed between the uprights. A device rotates the supporting and securing device about a horizontal axis between a first position in which, when the flattening element is connected to the turning-over device, the cylinders of the flattening element are oriented downward, and a second position in which, when the flattening element is connected to the turning-over device, the cylinders of the flattening element are oriented upward. Vertical translation drive devices vertically translate the supporting and securing device. Each vertical translation drive device is connected to one respective upright.

Abstract: In a method for the spectral analysis of a metal coating layer deposited on the surface of a steel strip, the strip is moved along an arc of the outer surface of a rotating roller with a cylindrical wall guiding the strip by contact. An ablation laser beam is guided into an internal cavity of the cylindrical wall to be placed in optical incidence under a normal axis on the outer surface of the roller on a targeted contact point of the strip and the roller. The beam passes through the wall via a wall opening, which is transparent to the beam. A plasma spectral emission distribution from the laser ablation to the contact point is collected by optical feedback in the direction of the normal axis on the outer surface of the roller and through the opening in order to be guided towards a spectral measurement unit. The normal axis on the outer surface for the optical incidence and feedback is placed in synchronous rotation with the roller.