Cold-rolled galvanizing line passivation liquid adding system and operation method thereof

Abstract

The invention relates to a cold-rolled galvanizing line passivation liquid adding system and an operation method thereof. The cold-rolled galvanizing line passivation liquid adding system is characterized in that a liquid supply sealing tank is placed above two working liquid grooves; the top of the liquid supply sealing tank is provided with a liquid adding cover; the bottom of the liquid supplysealing tank is provided with a liquid outlet connected to an upper end of a liquid supply pipe; a lower end of the liquid supply pipe is connected to an upper end of a limiting pipe on a corresponding side through a quick-change connector; a lower end of the limiting pipe extends into the corresponding working liquid grooves; a lifting roller and a coating roller are arranged above the working liquid grooves; a lower part of the lifting roller is immersed under the liquid level of passivation liquid in the working liquid grooves; one side of the coating roller is in contact with the lifting roller, and the other side is in contact with a corresponding side of strip steel; the working liquid grooves are connected to a liquid receiving tank through a return pipe; a return liquid outlet in the bottom of the liquid receiving tank is connected to the liquid supply pipe through a return liquid supply pipe; and the return liquid supply pipe is provided with a return liquid pump. The system provided by the invention has a simple structure as well as high prevention and error correction capabilities; the equipment failure rate is lowered greatly; the maintenance cost is lowered; and the defects of passivation liquid leakage and passivation spots are avoided.

Description

technical field [0001] The invention relates to the technical field of cold-rolled galvanized sheet production, in particular to a cold-rolled galvanized line passivation solution adding system and an operation method thereof. Background technique [0002] In most cold-rolled galvanizing lines, passivation and oiling coexist to prevent oxidation of galvanized strips during transportation and short-term storage. According to the application occasions, transportation and storage conditions of galvanized sheets, the galvanized sheets can be passivated or oiled respectively, or the double treatment of first passivated and then oiled can be carried out to meet the different requirements of users. [0003] At present, most of the passivation treatment equipment configured online is a four-roller roller coater, which coats the upper and lower surfaces of the strip with passivation solution through 2 coating rollers and 2 lifting rollers. However, conventionally used passivation tr...

AI Technical Summary

Problems solved by technology

However, conventionally used passivation treatment equipment generally has problems such as complex structure of passivation liquid circulation system, many fault points, and poor response to faults.

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