Device and method for measuring and monitoring the level of liquid metal in a crystalliser
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United States of America Patent
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Sep 13, 2011
Grant Date -
Nov 20, 2008
app pub date -
Jan 26, 2007
filing date -
Jan 27, 2006
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Abstract
A device and method for measuring the surface level and/or the presence of a molten metal bath in a cooled container, particularly a crystallizer for a continuous casting process, comprising a source of an electromagnetic field, wherein said source of an electromagnetic field is a transmission coil fed with electrical energy at a predetermined frequency. The information on the level and/or the presence of said surface level is obtained by processing the total impedance (Z), as measured on said transmission coil, in order to calculate the contribution to said impedance (Z) of the currents induced in the walls of the crystallizer, which depend on temperature of the crystallizer and, from it, the value of said surface level and/or the presence of the molten metal bath.
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