Method for eliminating longitudinal stripes on surface of cast rolling stock for ultra-thin aluminium foil

Abstract

The invention discloses a method for eliminating longitudinal stripes on the surface of a cast rolling stock for an ultra-thin aluminium foil, which belongs to the technical field of aluminium foil production. The method comprises the following steps of: 1, pre-treating a cast spout: in the event of manufacturing the cast spout, graphite paper which is L (the length of the cast spout) in length, 15 mm in width and 0.5 mm in thickness is bonded at a lip of the cast spout so as to increase flexible contact between the lip of the cast spout and a casting and rolling roller and reduce abrasion possibility of the lip in the production process and in the event of processing strips online, thereby reducing the possibility of forming the longitudinal stripes on the surface of the cast rolling stock because of the damage of the lip; and 2, processing the longitudinal stripes online: copper foils or aluminium foils are bonded on the corresponding casting and rolling rollers when the surface of the cast rolling stock has the longitudinal stripes in the production process; friction is generated between the foils and slag at the lip of the cast spout; and the slag at the lip of the cast spout is taken out so as to eliminate the longitudinal stripes on the surface of the cast rolling stock. The method disclosed by the invention has the advantages of being simple and convenient in operation, good economical efficiency and the like. The method is especially applicable for producing the cast rolling stock for the ultra-thin aluminium foil.

Description

Technical field: [0001] The invention relates to a method for eliminating longitudinal stripes on the surface of cast-rolling blanks for ultra-thin aluminum foils, which is particularly suitable for producing cast-rolling blanks for ultra-thin aluminum foils, and belongs to the technical field of aluminum foil production. Background technique: [0002] During the production process of aluminum cast rolling plate, the continuous friction between the lip of the casting nozzle and the roll may easily cause local damage to the lip of the casting nozzle or the crystallization conditions at the front edge of the casting nozzle will be destroyed due to the slag hanging on the front edge of the casting nozzle lip, resulting in the casting Longitudinal stripes appear on the surface of the billet. This kind of defect cannot be eliminated in the subsequent rolling process. In severe cases, the aluminum foil will be interrupted in the subsequent rolling. Usually, such defects can only b...

AI Technical Summary

Problems solved by technology

[0002] During the production process of aluminum cast rolling plate, the continuous friction between the lip of the casting nozzle and the roll may easily cause local damage to the lip of the casting nozzle or the crystallization conditions at the front edge of the casting nozzle will be destroyed due to the slag hanging on the front edge of the casting nozzle lip, resulting in the casting Longitudinal stripes appear on the surface of the billet

This kind of defect cannot be eliminated in the subsequent rolling process. In severe cases, the aluminum foil will be interrupted in the subsequent rolling. Usually, such defects can only be eliminated by re-setting the plate.

It not only increases the production cost, but also delays the production cycle

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