Steel quenching filter device for continuous-annealing battery and process method

Abstract

The invention relates to a steel quenching filter device for a continuous-annealing battery and a process method, and belongs to the field of cold-rolled product quenching treatment. The device comprises a spraying working slot, a spraying pump, a clear liquid box, a first settling tank, a water supplementing pump, a second settling tank and a manganese sand filter, wherein the spraying working slot is connected with the first settling tank through a pipeline; the first settling tank is communicated with the second settling tank at a high place; the second settling tank is connected with the manganese sand filter through a pipeline; the manganese sand filter is in pipeline connection with the second settling tank through a self-circulating filter pump; the second settling tank is in pipeline connection with the clear liquid tank through the liquid supplementing pump; and the clear liquid tank is in pipeline connection with the spraying working slot through the spraying pump; and quenching treatment is performed, so that the proportion of sand-hole defects formed in a strip steel surface is reduced, and therefore, color difference on the strip steel surface is eliminated for enabling the strip steel surface quality to reach O5 surface requirements.

Description

technical field [0001] The invention relates to a steel quenching water filter device and a process method for continuously withdrawing batteries, belonging to the field of quenching water treatment of cold-rolled products. Background technique [0002] Battery steel is a high-tech, high-quality precision cold-rolled thin plate boutique. At the same time, it is a product with high-speed, deep drawing and thinning and stretching processes, and strict appearance quality requirements. The thickness of battery steel is 0.25-0.5mm , it is required to achieve double-sided O5 surface quality; in the continuous annealing process of battery steel, the final process is water cooling through a quenching tank, because the steel plate must be water cooled to achieve a certain performance after heating. When the steel surface is water-cooled, the oxide scale on the surface of the strip steel due to high temperature oxidation will be washed away and enter the circulation tank, so that it w...

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Problems solved by technology

[0002] Battery steel is a high-tech, high-quality precision cold-rolled thin plate boutique. At the same time, it is a product with high-speed, deep drawing and thinning and stretching processes, and strict appearance quality requirements. The thickness of battery steel is 0.25-0.5mm , it is required to achieve double-sided O5 surface quality; in the continuous annealing process of battery steel, the final process is water cooling through a quenching tank, because the steel plate must be water cooled to achieve a certain performance after heating. When the steel surface is water-cooled, the oxide scale on the surface of the strip steel due to high temperature oxidation will be washed away and enter the circulation tank, so that it will continue to adhere to the surface of the strip steel. In the manufacture and production of battery steel cases, due to deep drawing processing, it is easy to cause perforation of the battery case or corrosion and perforation after canning the battery, resulting in serious defects in the product, which is not allowed in the production of battery cases;

[0003] The water quenching device used in the battery steel in the prior art does not have a filter device, and the quenching device used for long-term recycling will produce a large amount of sediment in the water tank after being rinsed by quenching water due to residual impurities on the surface of the strip steel, and then sprayed by the quenching water circulation device. Sprinkled on the surface of the strip steel, forming various spots and entrainment of foreign matter, so it often leads to the defect of suspected "trachoma" in the punched steel shell, that is, the foreign matter is pressed into the

Once this defect occurs, it will directly lead to the scrapping of the terminal product. At the same time, products with various color differences cannot meet the requirements of O5 surface quality, resulting in product quality degradation, increasing the product failure rate, and increasing the cost of the product.

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