Liquid metal cleanliness analyzer
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United States of America Patent
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Jul 25, 2017
Grant Date -
Sep 10, 2015
app pub date -
Oct 10, 2013
filing date -
Oct 15, 2012
priority date (Note) -
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Abstract
An apparatus to detect and measure suspended particles in a molten metal where the suspended particles have an associated noise frequency range has in addition to the electrically non-conductive barrier for immersion in the molten-metal, a device to move the molten metal through an orifice in the barrier and electrodes, a time varying excitation source that generates an AC current at a predetermined range of excitation frequency that is out of the predominant noise frequency range to generate an AC signal that is representative of the measure of the suspended particles. A detector detects and quantifies from the measurement AC signal the suspended particles. The detector can be a synchronous detector.
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