Method for adjusting the height of the pouring liquid in the casting mould of the continuous casting plant

Abstract

The invention relates to a method for regulating the height (h) of the casting level (1) in a mold (2) of a continuous casting installation (3), wherein liquid metal (4) flows into the mold (2), wherein the outflow of liquid metal (4) into the mold (2) can be controlled by a control element (8), the volume flow of liquid metal (4) flowing into the mold (2) being measured by a flow sensor (9), the volume flow being regulated in a first regulating circuit on the basis of a nominal value, the height (h) of the casting level (1) being regulated in a second regulating circuit on the basis of a nominal value or a nominal range (hsoll). According to the invention, a second controller (11) provides the first regulating circuit with a nominal value regarding the volume flow, wherein the determination of the actual height (hist) of the casting level (1) is carried out while taking into account a standing wave on the casting level (1) preferably by means of a number of optical waveguides (12). In this way, the height of the casting level can be kept constant in the mold in an improved manner.

Description

technical field [0001] The invention relates to a method for adjusting the height of the pouring liquid level in a casting mold of a continuous casting plant. Background technique [0002] In the continuous casting of metal slabs, the liquid metal is usually conducted from the ladle via hidden pipes into an intermediate container (tundish). The liquid metal then passes from the intermediate container via the sprue into the mold. At the lower end of the mold, the poured billets are then discharged and deflected from the vertical into the horizontal by means of the billet guide. [0003] It is important here to keep the liquid metal in the mold at a defined pouring level in order to be able to carry out the continuous casting process with high quality. Usually, a certain height range is allowed for this, within which the pouring liquid level in the casting mold is allowed to lie. The outflow from the intermediate container into the pouring tube can include a plug which is a...

AI Technical Summary

Problems solved by technology

[0006] In addition to the constant regulation of the volumetric flow of liquid metal into the casting mold, another problem is that flow effects of the liquid metal also occur in the casting mold itself, which makes it difficult to maintain a constant pour height defined in the casting mold

Furthermore, as long as it has not solidified, the properties of the billets being cast are a potential source of disturbance in keeping the pouring level constant

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