Apparatus for forming nitrogen cloud to produce hot dip coated steel sheet
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United States of America Patent
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Jan 9, 2018
Issued Date -
N/A
app pub date -
Nov 13, 2015
filing date -
Aug 1, 2012
priority date (Note) -
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Abstract
A device installed between a surface of a coating bath and an air knife equipment to produce a hot dip metal coated steel sheet to form a non-oxidation atmosphere in a surface of a coated steel sheet ascending from the coating bath, the device comprising: lower gas discharge bars spaced apart from the surface of the coating bath by a predetermined distance and discharging a non-oxidation gas in a direction of the surface of the coating bath along the surface of the coated steel sheet; a side cover extending upwardly slopingly in a direction of the coated steel sheet from the sides of the lower gas discharge bars; and upper gas discharge bars formed at an upper end of the side cover and discharging a non-oxidation gas downwardly.
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