The hot-dip galvanizing process of strip steel often needs to restrain the upward movement of zinc ash in the snout,because the zinc ash is easy to adhere to the surface of strip steel,affecting the coating quality.In addition,the zinc ash flowing reversely to the annealing furnace will affect the upstream process.Combined with an external circulation device of protective gas in the snout proposed by a steel plant,the gas flow field in the snout was simulated and analyzed by Computational Fluid Dynamics,and the influence of extraction flow rate on gas flow,global reverse flow and pressure balance was discussed;The orthogonal analysis was carried out to determine the significant influence of the extraction flow,and the optimal parameters was summarized.The mechanism of the reverse flow under this condition was be mastered.This study provides theoretical guidance for the operation scheme of the external circulation device of the snout.
hot galvanizingsnoutreverse flownumerical simulation
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