Patent ID: 7780906
Filing Date: 2010-08-24
Classification: C21C,F27D,G01N,Y02P

Abstract:
1. A device for control of bubbling of a metal bath in a ladle or in another similar metallurgical vessel comprising: a bottom injector linked to a source of supply of pressurized stirring gas to be injected with aid of a pipe provided with a facility for adjusting a flow rate of the gas; at least one vibration sensor mounted on the ladle or vessel itself or on a support frame thereof; a signal processing unit to process a vibratory signal gathered by the sensor; and the signal processing unit comprises at least, and in successive order of processing of the vibratory signal, a high-pass analog filter, a digitizer, a digital filter calibrated on vibratory responses of the ladle or vessel, and a computer configured to compute a sliding temporal quadratic mean of RMS type.