Surface cleansing of continuous-strip steel for hot-dip metal coating and apparatus for decreasing surface cleansing solution requirements
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United States of America Patent
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Jan 20, 2004
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N/A
app pub date -
Jul 23, 2001
filing date -
May 23, 1995
priority date (Note) -
Expired
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Abstract
Cold-reduced flat-rolled low carbon steel strip is surface cleansed of ferromagnetic contaminants including iron fines, iron oxide particulate and associated debris which result from gauge-reduction operations. Such ferromagnetic contaminants are permanently removed from the strip steel hot-dip galvanizing system by dynamically concentrating such contaminant which are flushed to a magnetically-assisted particle separation container, formed from paramagnetic sheet material, which retains such contaminants, while cleansing solution at a desired purity level, is returned to the surface cleansing system; with sedimentation tank means providing for diminishing waste disposal concerns by separating sludge and recycling liquid.
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