Device and method for cleaning surface of silicon steel

Abstract

The invention provides a device for cleaning the surface of silicon steel. The device comprises online grooves including the alkali liquor immersion groove, the alkali liquor brushing groove, the electrolysis cleaning groove, the high-pressure-water spraying groove, the water brushing groove, the hot-water rinsing groove, the hot-water spraying groove and the like and corresponding circulation grooves connected with the online grooves, wherein the online grooves are sequentially connected. The circulation grooves are provided with high-low liquid level water supplementing control devices respectively. The high-pressure-water spraying groove and the hot-water spraying groove are internally provided with vertically-arranged spraying nozzles respectively. The invention further provides a method for cleaning the surface of the silicon steel. The silicon steel is effectively cleaned by setting parameters such as the alkali liquor concentration, the alkali liquor temperature and the pure water temperature through the device. By means of the device and the method, the cleaning quality of the surface of rolled hard roll strip steel is improved in an electrical steel unit, it is guaranteed that the surface of furnace-entered strip steel is clean, inner-furnace dross is easily reduced, the quality of the surface of the strip steel is improved, and meanwhile pure water consumption is reduced.

Description

technical field [0001] The invention relates to the field of strip steel cleaning, in particular to a strip steel surface cleaning device and a cleaning process suitable for large-scale production. Background technique [0002] Before the strip is annealed and coated, the surface condition and cleanliness are prerequisites for continuous annealing and coating. During the rolling process of steel strip, various sundries will inevitably be left on the surface, such as rolling oil, anti-rust oil, transportation oil, dust and oxide film layer. Therefore, it must be cleaned before annealing to completely remove the oil on the surface of the strip, otherwise various oils remaining on the surface will form carbonaceous stains during the annealing process, pollute the atmosphere in the furnace, affect the decarburization efficiency, and even cause carburization . In addition, oil stains will also deteriorate the surface quality of the steel strip and cause nodules on the hearth ro...

AI Technical Summary

Problems solved by technology

In this cleaning method, pure water is used to clean after scrubbing D with lye, but due to the backward movement of the cleaning liquid, it is easy to cause a small amount of cleaning liquid in the pure water cleaning tank E, resulting in poor cleaning quality of the strip surface and easy to produce spots

In addition, the pure water tanks c, d, e, f and g are in a state of continuous water replenishment, and the pure water overflows continuously, resulting in waste of pure water

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