Nozzle Spray Diffusivity Changing Law for Ultra Fast Cooling in Hot Strip Mill

• Published in: 东华大学学报（英文版） Vol. 32; no. 4; pp. 583 - 587
• Main Author: 江连运 赵春江 石建辉 吴迪 王国栋
• Format: Journal Article
• Language: English
• Published: State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China%School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China%State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China 31.08.2015; School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China
• Subjects: slot nozzle; ultra-fast cooling; intensive nozzle; spray diffusivity
• ISSN: 1672-5220

Slot nozzle and intensive nozzle can be used in ultra fast cooling equipment. The spray cooling method with higher water pressure can be taken in order to achieve ultra fast cooling for hot rolled strip. Water will be diffused after it is sprayed out from ultra fast cooling nozzle. Spray diffusivity will affect water velocity and penetrability of water into residual water layer on top of the strip,and then it will affect strip cooling effect. Water spraying process can be simulated by Fluent and some conclusions were obtained. Slot nozzle width and outlet velocity within setting range could not affect the length of potential core zone and the spray diffusivity. Intensive nozzle diameter and outlet velocity will affect the length of potential core zone and the spray diffusivity with different extent. These conclusions will provide referenced role for confirming ultra fast cooling nozzle size and distance between ultra fast cooling nozzle and hot rolled strip.