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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 8
SUMMARY:Dynamic recipe control for continuous annealing and hot-dip galvanising lines 
DESCRIPTION:At Tata Steel's European production lines for continuous annealing and hot-dip galvanising, strip temperature is controlled by an in-house developed, non-linear model predictive controller. Every incoming strip is assigned its own set of target temperatures, commonly referred to as the temperature recipe, based on its chemical composition, dimensions and special requirements. Over the years, the controller has demonstrated its value by maximising speed of production whilst minimising deviations from the recipe, especially during transitions between strips with different recipes. This ensures maximum uniformity of the time-temperature path over the length of each strip, which translates to maximum homogeneity of product properties (mechanical, chemical or otherwise) if these are uniform at the start of the annealing process. 
 
However, if the initial product properties vary between several strips within the same order, or even along the length of a single strip, these heterogeneities will not be fully alleviated by keeping the process temperatures close to recipe values. In order to improve the uniformity of the final product properties after annealing, we have developed an application capable of determining a tailored set of temperature targets, based on incoming strip properties. The application uses material models to determine which target temperature adjustments are expected for a specific strip, so as to provide optimum homogeneity of final product properties. The resulting tailored recipe is then fed back to the temperature controller to be assigned for this specific strip. In this way, maximum use can be made of the annealing line capabilities to achieve our customers’ target material properties with tighter tolerances. 

CLASS:PUBLIC
DTSTART:20230615T143000
DTEND:20230615T145000
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