Method for operating an annealing furnace
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Accused Products
Abstract
A method for operating an annealing furnace to anneal a metal strip provides that, initially, at least one target material property (MPTarget) is specified for a point or a section of the metal strip after passing through the annealing furnace. In addition, information (E) on the metal strip is provided before or in the annealing furnace. A calculation of a target temperature distribution (TTarget) and/or a target speed (VTarget) of the metal strip in the annealing furnace is then carried out with the assistance of a computer-aided model as a function of the target material properties and the specified information. The target temperature distribution and/or target speed calculated in this manner is/are subsequently set in the annealing furnace in order to transfer the material property of the metal strip behind the annealing furnace to the desired target material property MPTarget.
1 Citation
19 Claims
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1-10. -10. (canceled)
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11. A method for operating an annealing furnace (200) for annealing a metal strip, comprising the following steps:
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specifying a desired target material property (MPTarget), to be assumed by a point or section of the metal strip (100) after passing through the annealing furnace (200); providing at least one piece of information (E) relating to the metal strip in front of or in the annealing furnace (200); calculating a target temperature distribution (TTarget) and/or a target speed (VTarget) of the metal strip (100) in the annealing furnace (200) with assistance of a computer-aided model (220) as a function of the desired target material property (MPTarget) and the information (E) relating to the metal strip; setting the target temperature distribution (TTarget) and/or the target speed (VTarget) of the metal strip (100) in the annealing furnace (200) with assistance of a furnace control system (230) as a control element; measuring an actual material property (MPActual) of the metal strip (100) after passing through the annealing furnace (200); calculating a comparative temperature distribution (TComp) and/or a comparative speed (VComp) of the metal strip (100) in the annealing furnace (200) with the assistance of the computer-aided model (220) as a function of the measured actual material property (MPActual) of the metal strip (100) after passing through the annealing furnace (200) and the information (E) relating to the metal strip in front of or in the annealing furnace (200); and adjusting the temperature distribution and/or the speed of the metal strip (100) in the annealing furnace (200) to the comparative temperature distribution (TComp) and/or the comparative speed (VComp) through suitable adapting of the computer-aided model; wherein the adapting of the computer-aided model takes place only after the passing of at least the entire metal strip through the annealing furnace (200), and wherein the adapting of the computer-aided model comprises the sub-steps of measuring an actual temperature distribution (TActual) and/or an actual speed (VActual) of the metal strip (100) in the annealing furnace (200), comparing the actual temperature distribution (TActual) with the calculated comparative temperature distribution (TComp) and determining a temperature deviation (Δ
T); and
/orcomparing the actual speed (VActual) of the metal strip (100) in the annealing furnace (200) with the comparative speed (VComp) and determining a speed deviation (Δ
V);calculating at least one suitable adaptation value (a) for adjustment of the computer-aided model (220) based on the temperature deviation (Δ
T) and/or the speed deviation (Δ
V);adapting the computer-aided model (220) based on the adaptation value (a); and recalculating the target temperature distribution (TTarget) and/or the target speed (VTarget) of a new metal strip (100) with the assistance of the adapted computer-aided model (220). - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification