Control method and system for semi-continuous production of push-pull type pickling tank

Abstract

The invention discloses a control method for semi-continuous production of a push-pull type acid pickling tank. The control method comprises the following steps: setting each wringing roller and an outlet pinch roller of the acid tank to be independently controlled; when the tail part of the previous coil of strip steel leaves the preset wringing roller in the acid tank, controlling the next coil of strip steel to start threading operation; and controlling the previous coil of strip steel and the next coil of strip steel to operate simultaneously on the basis of keeping a distance greater than a preset safety distance in the acid tank. According to the control method for semi-continuous production of the push-pull type acid pickling tank, the production running speed can be increased, the production capacity can be improved, and the production cost can be reduced. The invention further discloses a control system for semi-continuous production of the push-pull type pickling tank.

Description

technical field [0001] The invention belongs to the technical field of iron and steel cold-rolled pickling production, and in particular relates to a control method and system for semi-continuous production of a push-pull pickling tank. Background technique [0002] Pickling is an important process in the production process of cold-rolled strip steel. Its purpose is to remove iron oxide on the surface of the strip steel, cut off cracked edges, and provide qualified raw material coils for the next process (usually cold rolling mill). The push-pull pickling production line is a discontinuous pickling unit. The strip is driven forward by the pinch roller and the squeeze roller during the strip threading process. After leaving the acid tank, the strip is pulled by the tension of the pinch roller. steel. Among them, the acid tank is an important equipment of the pickling unit. It is divided into two parts: pickling tank and rinsing tank. The general total length is between 80 me...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the production process and rhythm control of the push-pull pickling are that the head of the strip steel is prepared before the acid tank by decoiling, straightening, corner cutting, etc., and then sent to the entrance of the acid tank, and then squeezed by the squeeze roller in the acid tank. After pushing through the acid tank, the tail of the coil of strip steel exits the acid tank, and then starts the threading production of the next coil of strip steel. It can be seen that the overall rhythm of this production method is slow, and it cannot meet the growing requirements for increasing production capacity and reducing costs.

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