Title

CVC CHECK VALVE FOR DESCALING NOZZLE AS A TOOL TO PROTECT INGOTS AGAINST UNWANTED COOLING EFFECTS IN HOT STRIP MILLS

CVC CHECK VALVE FOR DESCALING NOZZLE AS A TOOL TO PROTECT INGOTS AGAINST UNWANTED COOLING EFFECTS IN HOT STRIP MILLS

Authorship

Lohse, Folker Borchardt: Georg; Paal, Jochen

Lohse, Folker Borchardt: Georg

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Paal, Jochen

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DOI

10.5151/2594-5297-20543

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Abstract

Steel industry is faced by demands for diversification and higher quality steel grades, shorter delivery times and fluctuation of production scales. Application of descaling technology in steel milling process is a very special field of engineering. Production changes due to market influences will create the necessity of technological optimization. A well known problem for the rolling process is spilling water out of turned off upper descaling headers. Uncontrolled water on the surface leads to inhomogeneous temperature gradients of the ingot material and causes unwelcome material properties and defects for the finished product. Spraying System CVC (check valve control) design contains as central part a spring preloaded check valve, which closes automatically, when the high pressure descaling process has finished.

Steel industry is faced by demands for diversification and higher quality steel grades, shorter delivery times and fluctuation of production scales. Application of descaling technology in steel milling process is a very special field of engineering. Production changes due to market influences will create the necessity of technological optimization. A well known problem for the rolling process is spilling water out of turned off upper descaling headers. Uncontrolled water on the surface leads to inhomogeneous temperature gradients of the ingot material and causes unwelcome material properties and defects for the finished product. Spraying System CVC (check valve control) design contains as central part a spring preloaded check valve, which closes automatically, when the high pressure descaling process has finished.

Keywords

Descaling nozzles; Anti water hammering measures; Surface cooling; Heat transfer

Descaling nozzles; Anti water hammering measures; Surface cooling; Heat transfer