Process and plant for manufacturing steel plates without interruption

Abstract

Process and related plant for manufacturing steel plates with thickness<100 mm and width of up to 4000 mm from a continuous casting step for slabs, comprising a liquid core reduction step, without interruptions until completion of a finishing rolling step with high reduction ratios in at least one stand. The average temperature when entering the rolling step is ≧1250° C., but can be reduced for unalloyed or low alloyed steel greatest.

1 .- 6 . (canceled) 
     
     
         7 . A plant for manufacturing steel plate having a thickness<100 mm and a width up to 4000 mm, from a continuous casting product for slabs, comprising, after a continuous casting mold, a liquid core reduction means to obtain a thickness≧55 mm at the outlet at an average temperature≧1250° C., without interruptions until the last stand of a finishing rolling mill with one or more stands being in line with the said continuous casting under high reduction ratio, followed by cooling means and a shear for cutting the plate at a desired length. 
     
     
         8 . The plant according to  claim 7 , comprising a final straightening machine. 
     
     
         9 . The plant according to  claim 7 , comprising a descaler immediately upstream of said rolling mill. 
     
     
         10 . The plant according to  claim 7 , having a total length from continuous casting mold until the last cooling means not greater than 60 m. 
     
     
         11 . The plant according to  claim 7 , wherein for unalloyed or low alloyed steel requiring thermo-mechanical treatment additional cooling means are provided at intermediate positions between the rolling stands to reduce the a rolling temperature by 50-100° C.