Cast-flow cleaning system and method for surface cleaning of cold-rolled steel strip

Abstract

The invention discloses a cast-flow cleaning system and method for surface cleaning of a cold-rolled steel strip. The cast-flow cleaning system comprises a plurality of sets of cleaning units arrangedon the steel strip, wherein each cleaning unit comprises a centrifugal casting device and a purging mechanism; the centrifugal casting devices are arranged above and below the steel strip in a staggered manner; the centrifugal casting devices above the steel strip are symmetrical with the centrifugal casting devices below the steel strip; the purging mechanisms are also arranged above and below the steel strip; each centrifugal casting device comprises a casting head, a rotating shaft, a liquid inlet pipe and a plurality of centrifugal blades; each casting head sleeves the corresponding rotating shaft, so that each casting head can perform an angular-velocity rotation around the corresponding rotating shaft; the centrifugal blades are uniformly arranged on the outer side of the corresponding casting heads at intervals to form a circular shape; each liquid inlet pipe is arranged on the corresponding rotating shaft; and each purging mechanism comprises a compressed air pipe and a plurality of sprayers arranged on the compressed air pipe. The cast-flow cleaning system can realize complete cleaning of two sides of the steel strip after cold rolling and before plating, and the technological process in the current steel strip cleaning technology is simplified.

Description

technical field [0001] The invention relates to the surface cleaning technology of cold-rolled strip steel, and more specifically, relates to a throwing flow cleaning system and cleaning method for cleaning the surface of cold-rolled strip steel. Background technique [0002] With the development of the steel industry, the market has higher and higher requirements for coated sheets, such as automobile sheets and home appliance sheets, which must not only have good deep drawability, paintability, and corrosion resistance, but also have good coating Appearance and coating adhesion, which put forward higher requirements for the cleanliness of the strip surface before coating. However, after cold rolling, there are many dirts such as rolling oil, engine oil, iron powder and dust on the surface of the strip steel. The solid particles in these dirt will cause nodules on the annealing furnace roll before coating, and then in the strip Indentations and scratches occur on the steel ...

AI Technical Summary

Problems solved by technology

For example, US Patent No. 6,547,886B1 discloses a strip cleaning method and device using electrolytic cleaning and high-pressure jet cleaning. The strip cleaning method utilizes high-pressure jet cleaning instead of brushing, which avoids surface quality defects after strip cleaning, but the device is still It is relatively complicated, electrolytic cleaning needs to consume a lot of electric energy, and the liquid pressure in the high-pressure jet cleaning device is easy to lose, and the energy consumption is high

Another example is European patent EP0870854A1, which discloses a strip cleaning method and device using high-pressure jet cleaning and ultrasonic cleaning. This cleaning method replaces the electrolytic cleaning and brushing in the traditional strip cleaning method. The cleaning effect is better, but the ultrasonic cleaning The structure of the device is relatively complex, and the investment in equipment is large. The latest high-pressure jet cleaning technology uses a high-pressure pump to provide high pressure. The high-pressure pump and nozzle are easily damaged, which seriously affects the cleaning effect and unit productivity.

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