Method and plant for continuous direct casting of a metal strip

Abstract

The invention relates to a method for continuous direct casting of a metal strip, whereby said strip is cast by solidification of liquid metal in an ingot mould with cooled moving walls and a hot rolling of said strip is carried out in line, characterised in that a product is applied to the surface of the strip on exit from the ingot, which leaves a layer of lubricant on the surface when the strip is hot rolled and which causes a gas to be given off which contributes to the protection of said surface from oxidation. The invention further relates to a continuous direct casting plant for a thin metal strip, of the type comprising an ingot mould with moving cooled walls, where the solidification of said strip takes place and an in-line hot rolling unit for said solidified strip, characterised in comprising means for application of a product to the surface of said strip at the exit from the ingot, which leaves a layer of lubricant on the surface at the entry to the hot rolling unit.

Description

Technical field [0001] The present invention relates to continuous casting (continuous casting) of metals. It particularly involves the use of a twin-roll casting method or continuous casting of a small thickness of metal strip directly from liquid metal generally between cooling moving walls. Background technique [0002] The twin-roll casting method includes casting a metal strip made of, for example, carbon steel or stainless steel, Fe-Ni, or Fe by solidifying liquid metal on the cylindrical side walls of twin rolls that rotate in opposite directions and are cooled inside. -Si alloy or other ferrous or non-ferrous alloys. Two layers of solidified "skins" are formed on these walls, and they are roughly connected together at the "joining neck", which means that the spacing between the walls is the narrowest and roughly equal to the desired thickness of the tape to be cast (On the order of 1 to 10 mm, usually 3 to 5 mm). [0003] In many cases, the solidified metal strip leaving ...

AI Technical Summary

Problems solved by technology

But the presence of such a treatment chamber significantly complicates the construction and operation of continuous casting equipment

And even with the described inertization chamber, it is difficult to achieve compression ratios greater than about 50% unless the engineering cost of the device increases proportionally, but this will offset the "thin metal strip casting" compared to traditional manufacturing methods. "The economic benefit of