Specialized metallurgical processes – compositions for use therei – Processes – Process control responsive to sensed condition
Reexamination Certificate
2011-05-17
2011-05-17
King, Roy (Department: 1733)
Specialized metallurgical processes, compositions for use therei
Processes
Process control responsive to sensed condition
C266S081000
Reexamination Certificate
active
07942950
ABSTRACT:
A method introducing a stirring gas through a vessel bottom, receiving a measurable mechanical vibration by at least one sensor fixed to the vessel or to a supporting frame thereof, filtering the thus detected vibration signals by a high pass filter and preferably by a low pass filter, sampling and digitizing the vibration signals for exposing them to a second filtering which is digital and calibrated upon the vessel vibration responses, sequencing the response, exposing each sequence to the calculation of a temporal moving mean square, and extracting the total effective value RMS (Root Mean Square) of the measured vibration signal therefrom. The effective value is used for controlling the stirring gas flowrate supplied to the vessel. The method can be used for a stirring stand of steel making shop ladles, converters, RH processes, electric arc furnaces, etc.
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Bertoletti Claude
Borneque Yves
Burty Marc
Carioli Eric
Pernet Daniel
ArcelorMittal France
King Roy
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Yang Jie
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