PROCEDE DE CONTROLE ET D'EQUILIBRAGE DE LA PUISSANCE DANS UN FOUR ELECTRIQUE
The subject-matter of the invention is a method for controlling and balancing the electric-furnace power in smelting and annealing furnaces, in which the power is supplied into the furnace via at least one electrode, the tip of the electrode, or the tips of the electrodes, being held at the same lev...
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Zusammenfassung: | The subject-matter of the invention is a method for controlling and balancing the electric-furnace power in smelting and annealing furnaces, in which the power is supplied into the furnace via at least one electrode, the tip of the electrode, or the tips of the electrodes, being held at the same level throughout the process period. The power is controlled by varying the voltage prevailing between the furnace electrodes, it being possible to vary the electrical engineering variables of the furnace freely throughout the process period. The imbalance resulting from the electrode structure and the changes in the furnace behaviour is overcome by controlling the electrode movement to correspond to the wearing away of the furnace electrodes. This is done by utilising variables which are measured on/in the furnace and on the basis of these short-term and long-term trends obtained, and linear functions of these trends.
L'INVENTION CONCERNE UN PROCEDE DE CONTROLE ET D'EQUILIBRAGE DE LA PUISSANCE DANS UN FOUR ELECTRIQUE, DANS LEQUEL LA PUISSANCE EST APPLIQUEE AU MOYEN D'UNE ELECTRODE AU MOINS ET DANS LEQUEL L'EXTREMITE OU LES EXTREMITES DES ELECTRODES EST OU SONT MAINTENUE(S) DANS LE MEME PLAN PENDANT TOUTE LA SEQUENCE DU PROCESSUS.ELLE EST CARACTERISEE EN CE QUE LA PUISSANCE EST CONTROLEE EN AJUSTANT LA TENSION ENTRE LES ELECTRODES DU FOUR ET LES GRANDEURS ELECTRO-TECHNIQUES DU FOUR VARIANT LIBREMENT PENDANT TOUTE LA SEQUENCE, TOUT DESEQUILIBRE DU A LA STRUCTURE DES ELECTRODES OU A DES CHANGEMENTS DES CONDITIONS DU FOUR EST ELIMINE EN REGLANT LE DEPLACEMENT DES ELECTRODES SANS LE FOUR EN CORRESPONDANCE A L'USURE DES ELECTRODES, A PARTIR DES GRANDEURS MESUREES DANS LE FOUR ET DES TENDANCES A COURT TERME ET A LONG TERME CALCULEES A PARTIR DE CES GRANDEURS ET DES FONCTIONS LINEAIRES DES TENDANCES.APPLICATION A L'INDUSTRIE DES FOURS ELECTRIQUES NOTAMMENT DE FUSION ET DE CHAUFFAGE. |
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