Process and production line for manufacturing hot ultrathin...

B - Operations – Transporting – 21 – C

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B21C 47/24 (2006.01) B21B 1/46 (2006.01) C21D 9/68 (2006.01)

Patent

CA 2584144

A production line for hot steel strips, being fed from two casting lines (a, b) for thin slabs of thickness <_ 100 mm, only one of which (a) is aligned with a finishing rolling mill (g), comprises also two pairs of rotatable heating furnaces with mandrel (Al, A2; BI, B2), each respectively on either line, with an intermediate bypass section (d) between the furnaces of the first pair (Al, A2) to allow the endless rolling in a finishing rolling mill (g) located downstream. The furnaces (B1, B2) of the second pair of furnaces on the line (b) can be transferred along a path (k) from said line to the rolling line and vice versa for producing single strips. Furthermore an induction furnace (f) is provided upstream of the finishing rolling mill (g). Also the corresponding production process is described.

L'invention concerne un ligne de production pour produire des bandes d'acier à chaud, alimentée par deux lignes de coulage (a, b) au moyen de pavés minces d'épaisseur inférieure ou égale à 100 mm, dont un seulement (a) est aligné avec le laminoir de finition (g). La ligne de production de l'invention comprend également deux paires de fours rotatifs dotés de mandrins (A1, A2; B1, B2), chaque mandrin étant situé sur sa ligne respective, une partie de dérivation intermédiaire (d) de ces mandrins étant située entre les fours de la première paire (A1, A2) pour permettre le laminage sans fin dans le laminoir de finition (g) situé en aval. Les fours (B1, B2) de la seconde paire de fours de la lignes (b) peuvent être transférés le long d'une trajectoire (k), de ladite ligne à la ligne de laminage et vice et versa, pour produire des bandes uniques. En outre, un four à induction (f) est situé en amont du laminoir de finition (g). L'invention concerne également un procédé de production correspondant.

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