Method and device for producing a metallic strip in a continuous casting and rolling process

Abstract

A method and a device for producing a metallic strip by continuous casting-rolling, wherein a slab is cast in a casting machine and then sent to a finishing mill located downstream, relative to the transport direction of the strip. In the event that the transport of the slab or strip comes to a complete or substantially complete standstill, the following steps are carried out: (a) cutting through the strip at a first point; (b) cutting through the strip at a second point that is 0.1-5.0 m upstream from the first point; (c) removing the cut-out piece of strip to create a gap in the strip; (d) conveying new strip material into the area of the gap from the area located upstream of the first point; and (e) cutting off pieces of the new strip material conveyed from upstream according to step (d) and removing the pieces from the transport line.

We claim: 
     
         1 . A device for producing a metallic strip in a continuous casting-rolling process, comprising: a casting machine; at least one furnace; a first cutting device and a second cutting device for the strip or for the slab from which the strip is produced; a finishing mill; a cooling section; a flying shear; coiling devices; and a central fault reporting system connected to the casting machine, the furnace, the cutting devices, the finishing mill, the cooling section, the flying shear and the coiling devices, and operative to monitor their process state. 
     
     
         2 . The device according to  claim 1 , wherein the fault reporting system is configured to detect abnormalities pertaining to mass flow in the components of the installation. 
     
     
         3 . The device according to  claim 2 , wherein the fault reporting system is configured to trigger an alarm if abnormalities lying outside a predetermined tolerance range are detected in at least one of the components of the installation. 
     
     
         4 . The device according to  claim 2 , wherein the fault-reporting system is configured to activate the first and/or second cutting device as soon as abnormalities lying outside a predetermined tolerance range pertaining to the mass flow in the components of the installation are detected. 
     
     
         5 . The device according to  claim 1 , wherein the first and/or the second cutting device is configured to cut the strip or the slab out of which the strip is produced at two points adjacent to each other in the transport direction. 
     
     
         6 . The device according to  claim 5 , wherein the points adjacent in the transport direction are at least 200 mm apart. 
     
     
         7 . The device according to  claim 1 , wherein at least one vertically movable roller is arranged downstream, relative to the transport direction, from the first and/or the second cutting device.