Method and device to determine the height of the foamed slag layer during oxygen blowing in a steel converter

Determination of the height of foamed slag during the refining process in a steel converter (1) comprises recording and evaluating, as a variable for the foaming slag (9, 9'), the sound emissions (8) from the steel converter in the region of the converter opening (3) using a microphone (11). Th...

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Bibliographische Detailangaben
Hauptverfasser:	HEBLIK, RALF, UEBBER, NORBERT, HUFEN, HELGE
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING METALLURGY METALLURGY OF IRON PHYSICS PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TESTING TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
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Beschreibung
Zusammenfassung:	Determination of the height of foamed slag during the refining process in a steel converter (1) comprises recording and evaluating, as a variable for the foaming slag (9, 9'), the sound emissions (8) from the steel converter in the region of the converter opening (3) using a microphone (11). The higher frequencies above 1 kHz are used to characterize the foamed slag heights. An Independent claim is also included for a device used for carrying out the above process comprising a measuring device (10) consisting of a microphone and an evaluation device (13). Preferably the microphone utilizes a selective amplification effect for high sound frequencies to obtain a high signal/noise ratio with amplification of the signal and to obtain a high direction effect during sound measurement.