Method for controlling band steel sag for pickling bath

Abstract

The invention provides a method for controlling band steel sag for a pickling bath. The method is to calculate the formula of pickling bath sag according to the actual size of the pickling bath, regulate the speed of an inlet roller of the pickling bath and maintain velocity of an outlet roller as band steel linear velocity according to a certain regulation, so that the sag can change in a certain range, and the sag is controlled to change up and down in a permitted range, and pickling quality and pickling efficiency of the band steel can be improved through up and down oscillatory washing of the band steel. The method has the advantages of accurate control, easy realization, simple system and reliability, can wash the band steel up and down in a strong acid bath, improve the efficiency of washing on the premise that process requirement is completely met, and reduce production cost at the same time.

Description

technical field

[0001] The invention relates to a strip steel sag control method suitable for pickling tanks, which is a control method for strip steel sag in pickling tanks suitable for cold-rolled strip steel pickling lines. Background technique

[0002] The cold-rolled strip pickling tank consists of three parts, a strong acid tank, a weak acid tank (classified according to the strength of the acid in the acid tank), and a cleaning tank. Cold-rolled steel strip passes through strong acid tank, weak acid tank and cleaning tank, so that the iron oxide on the surface of the strip steel reacts with hydrochloric acid in the acid tank to achieve the purpose of removing the iron oxide scale on the surface of the strip steel.

[0003] The main equipment for driving strip steel pickling in the acid tank includes the pinch leveler at the entrance of the acid tank, multiple squeezing sticks in the acid tank, and pinch rollers at the outlet of the acid tank. The uncoiled steel strip...

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