A kind of continuous casting and rolling process of ultra-thin wide-width cast-rolled aluminum sheet and strip

Abstract

The invention discloses a continuous casting and rolling process for ultra-thin and wide-width cast-rolled aluminum plates and strips. The casting and rolling unit comprises: a conveying and supplying system for molten aluminum, which can realize automatic two-stage liquid level control, with a deviation of ±0.5mm, and improves titanium The wire fast feeding device is automatically adjusted by the casting nozzle to form a multi-stage step flow; and the rolling mill local roll gap automatic control system, the roll surface is equipped with two switchable systems of flame spraying and aqueous spraying; the molten metal is automatically controlled by the liquid level The device is further refined in the degassing box, and passes through the casting rolls that rotate in opposite directions and have circulating cooling water inside, so that the molten aluminum is rapidly crystallized and a certain deformation rate is generated, so as to realize the casting and rolling of molten aluminum alloy liquid metal into 2~ The 3mm cast-rolled sheet is then cut and coiled to form a finished coiled strip.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy casting and rolling, in particular to a continuous casting and rolling process for an ultra-thin and wide-width cast-rolled aluminum plate and strip. Background technique [0002] The continuous casting and rolling process of aluminum strip billet is an advanced production process introduced from abroad in the 1980s. The basic process is: aluminum ingot → melting furnace → static furnace → degassing → filtering → casting nozzle → rolling mill → intermediate unit → Coiler. [0003] Its characteristics are to cast and roll molten aluminum into a slab with a thickness of 6-10mm and a width of 650-1400mm and coil it, and then directly send it to a cold rolling mill for finishing, so that ingots, ingots, Heating, hot rolling, billeting and other processes not only shorten the technological process of aluminum sheet and strip production, greatly reduce engineering construction funds, but also re...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a continuous casting and rolling process of ultra-thin wide-width cast-rolled aluminum strips, which has stable molten metal liquid level control, greatly improves the thickness of the oxide layer on the metal surface, and at the same time ensures the uniformity of the internal temperature. , the advantages of meeting the needs of rolling speed increase and crystallization quality, and solving the problems of poor compatibility of equipment and low degree of automation, product quality and throughput cannot achieve long-term industrial application

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