Method and device for cleaning surface of dual-roller thin-strip casting roll

Abstract

The invention relates to a method and device for cleaning the surface of a dual-roller thin-strip casting roll. The surface of each casting roll of a dual-roller thin-strip continuous casting machine is cleaned by adopting two brush rolls arranged up and down, wherein the rotation direction of at least one brush roll is the same as that of each casting roll; the linear speed of each casting roll is constant and is more than the rotating speed of the casting roll, the device for cleaning the surfaces of the rolls controls the distance or pressure between the brush rolls and the casting rolls through a hydraulic cylinder fixed on a casting roll bearing seat; and the efficiency of cleaning the surfaces of the rolls is ensured through controlling the flattening quantity to be less than the average pit depth of the surfaces of the textured casting rolls by 1-10 times. According to the invention, in a process of casting the dual-roller thin-strip continuous casting process, the cleaning effect of the thin-strip continuous casting rolls can be improved, the heat conduction coefficient of the surfaces of the rolls is uniform, and the casting strip quality is improved.

Description

technical field [0001] The invention relates to continuous casting technology, in particular to a method and device for cleaning the roll surface of twin-roll strip continuous casting. Background technique [0002] The twin-roll strip continuous casting technology is different from the traditional continuous casting method. This process directly pours molten steel into a molten pool surrounded by two relatively rotating and capable of rapid cooling casting rolls and side sealing plates. The molten steel is cast The rotating circumferential surface of the roll is cooled and solidified, and then forms a solidified shell and grows gradually, and then is squeezed together at the smallest gap between the two casting rolls, and finally forms a thick metal thin strip at the outlet, and the strip passes through 1- After 2 passes of hot rolling, it is sent to the coiler for coiling. The method does not need to go through multiple hot rolling processes, which can greatly simplify the...

AI Technical Summary

Problems solved by technology

[0007] There are also many technical solutions mentioned in the thin strip continuous casting roll surface cleaning patents, which adopt the design scheme that the roll surface cleaning device and the casting machine work independently. Although the structure is relatively simple and the control of the two devices is relatively easy, the cleaning device is cumbersome. The relative distance between the brush roller surface and the casting roller surface is not easy to control. Once there is a time difference between the two actuators, it will directly cause uneven cleaning quality of the roller surface, and then cause surface quality defects of the casting belt.

Moreover, during the cleaning process of the roller surface, the bristles of the cleaning device are bent under pressure, so the bending amount of the bristles of the brush roller should match the depth of the pits on the surface of the casting roller, otherwise the cleaning effect will be reduced

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