NEW OPTIMIZING COWPER PROCESS-CONTROL AT KLOCKNER-STAHL-BREMEN

A model-aided Cowper process control has been implemented and commissi oned during the installation of a new blast-furnace control system for blast furnaces II and III of the Klockner Stahl GmbH in Bremen. The s tructure of the process control is presented and first operating resul ts are discussed. A program system developed by the BFI has been used for an energy optimal Cowper control. The real-time control algorithm uses a comprehensive mathematical simulation program for the accurate thermic simulation of the Cowpers in order to minimize the natural gas consumption. The natural gas saving due to the application of the Cow per control system amounted until now to between 5 and 15%. A reductio n by 5% of the natural gas consumption means a saving of about 800 000 DM/a in terms of natural gas costs. The operation of the Cowper contr ol system proved to be therefore highly cost-effective.