Method and device for cooling a steel strip

Details Method and device for cooling a steel strip Method and device for cooling a steel strip

C - Chemistry, Metallurgy

21

D

C21D 9/573 (2006.01) C21D 9/00 (2006.01) C21D 9/56 (2006.01)

Patent

CA 2544269

The invention relates to a cooling device for implementing a tempering operation of a steel strip, comprising a weir (4) in which a number of tubes (1) are completely immersed, which are, in essence, vertically stacked and arranged symmetrically on both sides of the strip (2) along this strip, and which discharge, in the form of essentially horizontal turbulent jets, a cooling fluid across a slot or a number of holes. Any two successive tubes (1), which are situated on the same size of the strip (2), are separated by the same gap (B) for all the tubes (1) for evacuating the cooling fluid. The gap (B) is set to a given specific flow rate value of the fluid in order to minimize the loss of load in the evacuation channels corresponding to said gap (B).

La présente invention se rapporte ô un dispositif de refroidissement, pour réaliser une opération de trempe d'une bande d'acier, comprenant un déversoir (4) dans lequel est complètement immergée une pluralité de tubes (1) empilés essentiellement verticalement et symétriquement de part et d'autre de la bande (2) le long de celle-ci et qui éjectent chacun, sous forme de jets turbulents essentiellement horizontaux, un fluide de refroidissement au travers d'une fente ou d'une pluralité de trous. Deux tubes (1) successifs quelconques, disposés d'un même côté de la bande (2), sont séparés par un intervalle (B) identique pour tous les tubes (1) en vue de l'évacuation du fluide de refroidissement. L'intervalle (B) est choisi, ô une valeur donnée de débit spécifique dudit fluide, pour minimiser la perte de charge dans les canaux d'évacuation correspondants audits intervalles (B).

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