A thin slab continuous casting and rolling production line and its production process

Abstract

The invention relates to a sheet billet continuous casting and rolling production line and a production process thereof, and belongs to the technical field of sheet billet continuous casting and rolling. According to the technical scheme, the sheet billet continuous casting and rolling production line comprises a continuous casting machine (1), a 1#pendulum shear (3-1), a 1#tunnel type heating furnace (9-1), a 1#descaler (7-1), a roughing mill group (10), a 2#pendulum shear (3-2), a billet picking device (4), a 2#tunnel type heating furnace (9-2), a 2#descaler (7-2), a finishing mill group (11), a laminar cooling (18), a flying shear (19) and a reeling-up machine set (20) which are arranged in sequence according to a rolling sequence. When the continuous casting speed of the continuous casting machine (1) is less than 5m / min, single block rolling or semi-endless rolling is adopted; and when the continuous casting speed of the continuous casting machine (1) is greater than or equal to 5m / min, endless rolling is adopted. The sheet billet continuous casting and rolling production line and the production process thereof have the beneficial effects that the temperature uniformity and the surface quality of a casting blank can be ensured, and different rolling modes can be adopted according to the continuous casting speed of the continuous casting machine.

Description

technical field [0001] The invention relates to a thin slab continuous casting and rolling production line and a production process thereof, belonging to the technical field of thin slab continuous casting and rolling production equipment in the metallurgical industry. Background technique [0002] At present, the existing thin slab continuous casting and rolling production lines all have fixed production line process schemes according to their respective process characteristics, and various layout schemes have their own characteristics to meet their respective process requirements. [0003] The cast slab needs to be rolled into an intermediate slab of required thickness in the rough rolling unit, and then enter the finishing rolling unit to be rolled into a finished product with a certain thickness. The rough rolling unit not only has reciprocating rolling, but also a continuous rolling process scheme; the finishing rolling unit generally adopts the continuous rolling proce...

AI Technical Summary

Problems solved by technology

During the production process of the cast slab, due to the inevitable surface oxidation, a layer of iron oxide scale will be covered on the surface of the substrate. After being rolled down by the rollers, the surface oxide scale cannot be extended due to its own characteristics, so it will eventually become a fine oxide scale mosaic. On deformed substrates, influences final strip surface quality

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