Foundry rolling unit

Abstract

The invention relates to a foundry rolling unit, comprising a first production line (I), with at least one casting machine (1, 11), the thin slabs (2, 12) of which may be introduced into at least one tunnel furnace (3, 13), whereby said tunnel furnace (3, 13) opens out into at least one finishing train (4), with at least one mill stand (5). After leaving the finishing train (4) the rolled hot strips may be introduced into at least one cooling run (7) and may be rolled on at least one coiler (8). The foundry rolling unit furthermore comprises a second production line (II) arranged in an at least partly parallel manner in terms of production, with at least one slab introducing device (20), through which the slabs (22) may be introduced into at least one reheating oven (23) and at least one cogging stand (24) arranged thereafter. The rolled pre-strips may be obtained as coils (25) from at least one coil-box (26). The foundry rolling unit further comprises a coil transport device (27), by means of which the coils (25) may be transferred before the finishing train (4), from the second production line (II) to the first production line (I). The coils (25) may be removed from the coil box (26) and transported to the input of the finishing train (4), in order to carry out introduction of the pre-strips. By means of the above it is possible to produce a complete spectrum of different steel types, in particular stainless steel and high-alloyed steel, whilst achieving a corresponding high throughput.

Description

technical field [0001] The invention relates to a casting and rolling equipment. Background technique [0002] For example, thin slabs (with a thickness of 40 to 90 mm) are processed in such casting and rolling plants to form strips. The plant includes a casting machine, from which thin slabs can be fed to at least one tunnel furnace. The tunnel furnace leads to a finishing train having at least one rolling stand. The thin slab is rolled into hot strip in the finishing train. After leaving the finishing train, the rolled hot strip is conveyed to at least one cooling section and coiled on at least one coiler. [0003] For example, German patent DE 195 29 049 discloses a high-speed thin-slab plant for producing hot-rolled steel strip from strip-shaped precast material in successive operations. In this, the solidified preformed material is cut into rough strip lengths by means of a continuous slitting plant and brought to rolling temperature in a balancing furnace (Ausgleic...

AI Technical Summary

Problems solved by technology

However, it will bring some difficulties in casting when producing stainless steel and high alloy steel

e.g. relatively low casting speed due to boiling of molten steel during casting

In addition, when changing frequently between stainless steel, high alloy steel and carbon steel, it may also cause problems in the operation of the finishing mill train and thus affect the quality of the processed strip

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