A method for rolling checkered plates from thin slabs

Abstract

The invention discloses a method for rolling a patterned plate, belonging to the field of iron and steel production, comprising heating continuous casting slab, rough rolling, finishing rolling and coiling, wherein: the temperature is controlled in the heating continuous casting slab, and after the furnace The descaling temperature is controlled at 1100~1130℃; the time in the furnace is controlled at 130±10min; the rough rolling is E1R1 and E2R2 is rolled for 3 passes; the temperature drop from the descaling temperature after the furnace to the finishing rolling inlet temperature is controlled within 100℃; The descaling mode is 1 group for post-furnace descaling, 0 group for rough rolling R1, 1 group for rough rolling R2, and 1 group for finishing rolling. Realize the production of thin slabs (75-90mm) with the existing production line without bending deformation.

Description

technical field [0001] The invention relates to a steel production method, in particular to a checkered plate rolling method suitable for thin slabs. Background technique [0002] Checkered plate is widely used as a non-slip steel plate used in construction, transportation and public places. Hot rolling mill rolling is the main process for producing checkered plate. The traditional regenerative heating furnace is replaced by a double regenerative walking beam heating furnace, and the design slab size is 210 / 230×(1200-2000)×12000mm. According to the international and domestic steel development trends, Rizhao Iron and Steel responded to the call for the strategic transformation of the national steel industry and the optimization of product structure. It took the lead in introducing the full headless ESP technology in China, and successfully put into operation 4 ESP production lines before 2019. The production line is continuous casting and rolling. When the casting starts or ...

AI Technical Summary

Problems solved by technology

The thin slab market has limited sales and low profits, and the inventory pressure is high

The thin slab of ESP has a thickness of only 70-95mm, which is equivalent to 33% to 45% of the normal slab (210mm). Due to the length of the heating furnace (46.3m) equipped on the hot rolling line, the slab takes a long time in the furnace from steel loading to tapping, and the furnace temperature is high, and the thin slab is prone to bending during the process of walking in the furnace, resulting in The end wall is scratched from time to time, and the steel tapping fails, and the furnace needs to be cooled and shut down.

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