Abstract: A device for controlling an arc furnace installation has an automatic controller (3) wherein a functional unit (6) for furnace control, a functional unit (7) for electrode control and a functional unit (8) for melting control are integrated in the controller (3).

Abstract: A method for optimizing the operation of a metallurgical plant using a model by modeling supply and discharge media streams, predetermining structure parameters which define the media streams, linking the media streams to one another, predetermining starting parameters which describe initial states, predetermining input operating parameters, determining and outputting output operating parameters, and determining and outputting end parameters, which describe end states of the units, by the model, predetermining the structure parameters to an optimization computer by a user and transmitting the parameters from the optimization computer to a model, and determining optimized operating parameters by the optimization computer on the basis of the starting parameters and an assessment criterion in accordance with an optimization algorithm using the model, wherein the assessment criterion is predetermined to the optimization computer by the user.

Abstract: A device for controlling an arc furnace installation has an automatic controller (3) wherein a functional unit (6) for furnace control, a functional unit (7) for electrode control and a functional unit (8) for melting control are integrated in the controller (3).

Abstract: A method for operating an electric-arc furnace with at least one electrode has one tapping method step. At the beginning of the tapping step, the energy supply to the at least one electrode (2) of the electric-arc furnace (1) is not stopped and the energy is still supplied to the at least one electrode (2) even during the tapping step. The step can begin before the traditional operating methods of an electric-arc furnace (1). This saves time, reduces the consumption of electrodes and energy, and also increases productivity. The desired energy content of the raw steel (8) is secured by the pre-calculation of the alteration of the energy content of the melt (4) during the tapping step and the danger of over-heating is compensated.

Abstract: A mathematical model for a metallurgical engineering system and a method for optimizing the operation of a metallurgical engineering system by means of said model. A plurality of units (7-12) of a metallurgical engineering system (6) are modeled by means of a mathematical model. Said units are associated with supply and discharge media flows. In order to optimize operation of the system (6), structural parameters are supplied to an optimization computer (1) by a user (5). The structural parameters establish at least the number and type of units (7-12). On the basis of start parameters, which describe the initial states of the units (7-12), and an evaluation criterion (K), the optimization computer (1) determines optimized operating parameters according to an optimization algorithm (A) using said model.

Abstract: A casting-rolling plant and a method of operating a casting-rolling plant are disclosed. At least one slab production line (40, 50) and at least one mill train (4) as well as at least one slab feeding device (20) that is independent of the slab production line (40, 50) with respect to the production process are provided. In order to achieve a higher throughput in the production of strip material, the slab feeding device (20) takes over slab feed to the mill train (4) during a production break of the slab production line (40, 50) in accordance with logistic and/or manufacturing standards up to a maximum output possible.

Abstract: A method and device for producing a strand of metal by means of a continuous-casting installation which has at least one cooling device for cooling the strand, the cooling device being assigned at least one reduction stand for reducing the thickness of the strand, the strand, during the thickness reduction, having a solidified skin and a liquid core. The cooling is set, by means of a temperature and solidification model, in such a manner that the solidification boundary between the solidified skin and the liquid core when the strand enters the reduction stand corresponds to a predetermined set solidification boundary between the solidified skin and the liquid core.

Abstract: A casting-rolling plant and a method of operating a casting-rolling plant are disclosed. At least one slab production line (40, 50) and at least one mill train (4) as well as at least one slab feeding device (20) that is independent of the slab production line (40, 50) with respect to the production process are provided. In order to achieve a higher throughput in the production of strip material, the slab feeding device (20) takes over slab feed to the mill train (4) during a production break of the slab production line (40, 50) in accordance with logistic and/or manufacturing standards up to a maximum output possible.

Abstract: A device and method for the early detection of a rupture in a continuous casting plant, in which liquid metal is cast into a chill (2) and is withdrawn from the chill (2) in the form of a billet (1), the temperature of the chill (2) being measured, and the temperature of the chill (2) being simultaneously presented with reference to the location at which the temperature was measured and the time over which the temperature was measured.

Abstract: The invention relates to a foundry rolling unit, comprising a first production line, with at least one casting machine, the thin slabs of which may be introduced into at least one tunnel furnace, whereby said tunnel furnace opens out into at least one finishing train, with at least one mill stand. After leaving the finishing train the rolled hot strips may be introduced into at least one cooling run and may be rolled on at least one coiler. The foundry rolling unit furthermore comprises a second production line arranged in an at least partly parallel manner in terms of production, with at least one slab introducing device, through which the slabs may be introduced into at least one reheating oven and at least one cogging stand arranged thereafter.

Abstract: A method and device are provided for casting a strand of liquid metal which is cast into a mold, and which is drawn as a strand out of the mold. The casting level, e.g., a level of the liquid metal in the mold, is regulated to a predetermined casting-level desired value using a casting-level controller having at least one integrator. The output of the integrator of the casting-level controller is replaced by a predetermined value when the difference between the casting-level actual value and the casting-level desired value exceeds a tolerance threshold.