Plant for producing metal strip

Plant for continuous casting of continuous steel ingots, in particular, although not exclusively, in the form of thick slabs, blooms or similar products comprising a continuous casting ingot mould defining a vertical casting axis (X) and a continuous ingot guiding device arranged under the ingot mould and herein a plurality of rotating to ers is incorporate around a horizontal rotation axis arranged on two opposite sides of the continuous ingot with respect to the casting axis (X), having a continuous ingot guiding function,

• wherein each of said rollers has an axial length shorter than the length of said opposite sides measured according to a parallel to the rotation axis, wherein on each of said two opposite sides the rollers are arranged along at least three respective rows parallel to the casting axis (X) so as to create a guide for the ingot,
• wherein a first row of lateral rollers is positioned in an area in the vicinity of a first corner of the ingot,
• wherein at least one row of central rollers is positioned in a central area close to the casting axis (X),
• wherein a second rows of lateral rollers is positioned in an area in the vicinity of a second ingot corner.
• wherein the rotation axes of said central rollers are staggered with respect to the rotation axes of said lateral rollers,
• wherein the rotation axes of a pair of two adjacent rollers of said first and said second row of lateral rollers are spaced at a first pitch (p, pi, pe) in the direction of the casting axis (X),
• wherein the rotation axes of a pair of two adjacent rollers of said at least one row of central rollers are spaced at a second pitch (m, me, mi) in the direction of the casting axis (X),
• wherein said first pitch (p, pi, pe) has different values depending on the position of the lateral rollers along the casting axis (X) and said second pitch (m, mi, me) has different values depending on the position of the central rollers along the casting axis (X).