A method for producing low board surface residue by substituting heat for cold products

Abstract

The invention relates to a production method of a hot-rolled product with low plate surface residue. The production method comprises the steps of uncoiling by an uncoiling machine; crushing and peeling off oxides on the surface of a strip steel by a withdrawal and straightening machine; carrying out acid pickling and rinsing on the strip steel; carrying out mechanical surface residue cleaning on the acid pickled and rinsed strip steel by a mechanical plate surface residue cleaning device; performing surface roughness homogenizing and finishing treatment to the treated strip steel in a finishing machine; and coiling the treated strip steel by a coiling machine to obtain a finished product. With the adoption of the technical scheme, the production method has the beneficial effects that: firstly, the mechanical surface residue cleaning process is additionally adopted in a rinsing section of the traditional acid-pickling temper mill unit, the plate surface chloride ion residue is reduced and the product corrosion resistance is improved; secondly, the temperature of a rinsing tank does not need to be increased gradually, the technology purpose of reducing the chloride ion residue on the surface of the strip steel can be achieved, and the production consumption is low; thirdly, the temperature of the strip steel entering the temper mill is reduced favorably, and the final strip shape and the strip quality are good.

Description

technical field [0001] The invention belongs to the technical field of deep processing of ordinary hot-rolled flat materials, and in particular relates to a production method for products with low board surface residue and substituting hot for cold products. Background technique [0002] After the strip is pickled, there will be acid residue on the surface, and the worse the surface quality of the strip, the greater the amount of acid residue on the surface. These residual chloride ions will seriously corrode the surface of the strip and make the surface of the strip yellow. Or yellow-green spots, and these strips are not as bright as normal strips after rolling, and the finished products are prone to re-corrosion. [0003] In order to reduce acid residue, traditionally, multi-stage rinsing method is used to clean strip steel, and the rinsing temperature is continuously raised during the rinsing process to increase the kinetic energy of molecules in the rinsing tank and acce...

AI Technical Summary

Problems solved by technology

Generally, the rinsing temperature of the final stage rinsing is about 85°C, which increases the energy consumption of the production process.

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