Method and Device for Producing a Metal Strip by Continuous Casting

Abstract

The invention relates to a method for producing a metal strip ( 1 ) by continuous casting. According to said method, a slab ( 3 ), preferably a thin slab, is initially cast in a casting machine ( 2 ), said slab being deviated from a vertical direction (V) into a horizontal direction (H), and in the direction of transport (F) of the slab ( 3 ) arranged behind the casting machine ( 2 ), the slab ( 3 ) is subjected to a milling operation in a milling machine ( 4 ) and at least one milling operation in at least one rolling train ( 5, 6 ). According to the invention, in order to improve the quality of the strip, the rolling and milling operations are carried out immediately after the slab ( 3 ) is cast in the casting machine ( 2 ). The rolling operation is divided into at least two partial-rolling operations in at least one first rolling train ( 5 ) and one second rolling train ( 6 ). The milling operation in the milling machine ( 4 ) is carried out directly prior to the first rolling operation or between both rolling operations. The invention also relates to a device for producing a metal strip ( 1 ) by continuous casting.

1 . A method for producing a metal strip ( 1 ) by continuous casting, where a slab ( 3 ), namely, a thin slab, is first cast in a casting machine ( 2 ) and then deflected from a vertical orientation (V) to a horizontal orientation (H), and where downstream of the casting machine ( 2 ) in the direction of conveyance (F) of the slab ( 3 ), the slab ( 3 ) is subjected to a milling operation in a milling machine ( 4 ) and at least one rolling operation in at least one rolling train ( 5 ,  6 ), wherein the rolling and milling operations are carried out directly after the casting of the slab ( 3 ) in the casting machine ( 2 ), where the rolling operation is divided into at least two partial rolling operations in at least a first rolling train ( 5 ) and a second rolling train ( 6 ), and where the milling operation in the milling machine ( 4 ) is carried out between the two rolling operations. 
     
     
         2 . A method in accordance with  claim 1 , wherein the slab ( 3 ) is heated in a furnace ( 7 ) between the first rolling train ( 5 ) and the second rolling train ( 6 ). 
     
     
         3 . A method in accordance with  claim 1 , wherein the slab ( 3 ) is cleaned in a cleaning and/or descaling unit ( 8 ) upstream of the first rolling train ( 5 ). 
     
     
         4 . A method in accordance with  claim 1 , wherein the slab ( 3 ) is brought to a desired temperature in a furnace ( 9 ) upstream of the first rolling train ( 5 ). 
     
     
         5 . A device for producing a metal strip ( 1 ) by continuous casting with a casting machine ( 2 ) in which a slab ( 3 ), namely, a thin slab, is cast, where a milling machine ( 4 ) and at least one rolling train ( 5 ,  6 ) are installed downstream of the casting machine ( 2 ) in the direction of conveyance (F) of the slab ( 3 ), especially for carrying out the method in accordance with  claim 1 , wherein a first rolling train ( 5 ) and a second rolling train ( 6 ) are installed directly downstream of the casting machine ( 2 ) in the direction of conveyance (F), with the milling machine ( 4 ) being installed between the two rolling trains ( 5 ,  6 ). 
     
     
         6 . A device in accordance with  claim 5 , wherein a furnace ( 7 ) is installed between the first rolling train ( 5 ) and the second rolling train ( 6 ). 
     
     
         7 . A device in accordance with  claim 6 , wherein the furnace ( 7 ) is constructed as a thermally insulated roller table enclosure. 
     
     
         8 . A device in accordance with  claim 5 , wherein a cleaning and/or descaling unit ( 8 ) is installed upstream of the first rolling train ( 5 ). 
     
     
         9 . A device in accordance with  claim 5 , wherein a furnace ( 9 ) is installed upstream of the first rolling train ( 5 ). 
     
     
         10 . A device in accordance with  claim 5 , wherein each rolling train ( 5 ,  6 ) has at least one rolling stand. 
     
     
         11 . A device in accordance with  claim 5 , wherein the first rolling train ( 5 ) has one or two rolling stands, which are realized as two-high or four-high stands. 
     
     
         12 . A device in accordance with  claim 5 , wherein the milling machine ( 4 ) comprises plain milling cutters. 
     
     
         13 . A device in accordance with  claim 12 , wherein the milling machine ( 4 ) has one or more plain milling cutters on each side of the slab. 
     
     
         14 . A device in accordance with  claim 5 , wherein the milling machine ( 4 ) comprises face milling cutters. 
     
     
         15 . A device in accordance with  claim 5 , wherein it comprises means for adjusting the contact setting of the milling cutters of the milling machine ( 4 ) as a function of the setting position, the thickness position, and/or the amount of swivel of the rolling stand or strong driver upstream of the milling machine ( 4 ).