Method for cleaning segment defect treatment in stainless steel cold rolling acid pickling process

A defect treatment and cleaning section technology, applied in the field of metallurgy, can solve the problems of rubber pressing defects, affecting product quality, black foreign matter adhesion, etc., achieve good decompression effect, excellent oil resistance, and improve the effect of safe operation

Inactive Publication Date: 2017-08-11
ZHANGJIAGANG POHANG STAINLESS STEEL
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Problems solved by technology

[0005] The invention provides a method for treating defects in the cleaning section in the pickling process of stainless steel cold rolling, so as to solve the problems that black foreign matter adheres to the surface of the strip steel in the final cleaning section, forms rubber pressing defects, and affects product quality.

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  • Method for cleaning segment defect treatment in stainless steel cold rolling acid pickling process

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Embodiment Construction

[0018] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.

[0019] The method for treating defects in the cleaning section in the stainless steel cold-rolled pickling process of the embodiment of the present invention includes:

[0020] In the final cleaning process, the strip is cleaned with at least three sets of rollers in the cleaning box, such as figure 1 As shown, the three groups of rollers are the entrance side squeeze roller, the middle side squeeze roller and the exit side squeeze roller respectively, wherein the material of the exit side squeeze roller is polyurethane rubber. Further, the squeeze rollers on the entrance side and the squeeze rollers on the middle side are both equipped with clear water cleaning, and the cleaning of the squeeze rollers on the exit side is squeeze cleaning. Further, a spray beam is ar...

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Abstract

The invention provides a method for treating defects in the cleaning section in the pickling process of stainless steel cold rolling. The method for treating defects in the cleaning section in the pickling process of stainless steel cold rolling includes: in the final cleaning process, using at least three The rollers clean the steel strip, and the three groups of rollers are respectively an entrance-side squeezing roller, a middle-side squeezing roller and an exit-side squeezing roller, wherein the material of the exit-side squeezing roller is polyurethane rubber. The invention eliminates the defect that the rubber is pressed into the binary ethylene-propylene rubber roller during use, which leads to a decrease in product quality and a short service life of the roller.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a process method in stainless steel production, in particular to a method for treating defects in a cleaning section in the pickling process of stainless steel cold rolling. Background technique [0002] At present, in the stainless steel production process, especially the pickling production process of stainless steel cold-rolled plate, the general process is: from cold-rolled coil → degreasing → high-temperature furnace annealing → sodium sulfate pickling → primary brushing → sulfuric acid pickling → secondary Scrubbing→nitric acid pickling→three times scrubbing→hydrofluoric acid, nitric acid mixed pickling→four times scrubbing→final cleaning, the ultra-clean stainless steel surface can be achieved, and the finished product can be achieved only through the subsequent smoothing process. [0003] Common defects are: black foreign matter adheres to the surface of the strip in the final c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08C23G3/02
CPCC23G1/08C23G3/026
Inventor 王民
Owner ZHANGJIAGANG POHANG STAINLESS STEEL
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