System and method to forecast the electrical conductivity of...

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G01R 27/02 (2006.01) C25B 11/00 (2006.01) G01R 29/00 (2006.01) G01R 29/08 (2006.01) G01R 31/00 (2006.01) G01R 33/00 (2006.01)

Patent

CA 2590482

The system (10) and the method are used for forecasting the electrical conductivity of an anode (12) for aluminum production before the anode (12) is baked. In the system (10), at least one receiving coil (20,22) is coupled to an electromagnetic field emitting unit (14,18). A sensing device (30) is connected to the receiving coil (20,22), the sensing device (30) outputting a signal indicative of a variation of the electromagnetic field received by the receiving coil (20,22) as the crude anode (12), or a portion thereof, passes inside the receiving coil (20,22). A value indicative of the electrical conductivity of the anode (12) is then calculated using the signal from the sensing device (30) and signals previously obtained using reference anodes (12). This way, the electrical conductivity of the anodes (12) can be forecasted before the crude anodes (12) are baked.

L'invention concerne un système (10) et un procédé de prévision de la conductivité électrique d'une anode (12) de production d'aluminium avant la cuisson de l'anode (12). Au moins une bobine (20, 22) de réception est couplée à une unité (14, 18) d'émission d'un champ électromagnétique dans ledit système (10). Un dispositif (30) de détection est connecté à la bobine (20, 22) de réception, ledit dispositif (30) de détection générant un signal indiquant une variation du champ magnétique reçu par la bobine (20, 22) de réception lorsque l'anode non cuite (12), ou une partie de celle-ci, passe dans la bobine (20, 22) de réception. Une valeur indiquant la conductivité électrique de l'anode (12) est alors calculée à l'aide du signal du dispositif (30) de détection et de signaux obtenus précédemment à l'aide d'anodes (12) de référence. La conductivité électrique des anodes (12) peut ainsi être prévue avant la cuisson des anodes non cuites (12).

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