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This work aims the reduction of zinc consumption, keeping the warranty of the coating layer, doing the overcoating control. As zinc is a high value input, the control of the coating that is applied on the strip become very important in order to get a competitive product that satisfy the customers. In order to remove the zinc excess, a managerial system for zinc consumption and a control model for process parameters had been developed, aiming the dynamic stability of the air knives pressure, based on the variables line speed; distance between air knives and strip, knives height and coating mass measured. Trainning and team conscientization has been applied as well.

REDUÇÃO DO OVERCOATING NAS LINHAS DE ZINCAGEM DA CSN USINA PRESIDENTE VARGAS