Multi-mode energy-saving hot-rolled strip steel production line and using method thereof

Abstract

The invention discloses a multi-mode energy-saving hot-rolled strip steel production line. The multi-mode energy-saving hot-rolled strip steel production line mainly involves a continuous casting tundish, a mold, a descaling machine 3, a roughing mill, a swing shear, an intermediate billet manipulator, a hot coil box, a rolling shear, a scrap steel removing device, a soaking pit furnace, an intermediate cooling device, a descaling machine 12, a finishing mill, a laminar cooling device, an induction soaking device, a flying shear and a recoiling machine, wherein the intermediate cooling deviceis arranged between the soaking pit furnace and the finishing mill, the scrap steel removing device is arranged behind the rolling shear, the scrap steel removing device do not communicate with the soaking pit furnace, the movable hot coil box is arranged between the intermediate billet manipulator and the rolling shear, and the induction soaking device is arranged between the laminar cooling device and the flying shear; and a using method comprises the following steps of smelting; casting into a blank; descaling for the first time; rough rolling; heating; cooling; descaling for the second time; finish rolling; cooling; electromagnetic induction heating; and coiling. The method not only has austenite rolling, but also can realize ferrite rolling, single-billet rolling and continuous rolling can be further achieved, and a product is uniform in mechanical property, low in comprehensive energy consumption and wide in thickness coverage range.

Description

technical field [0001] The invention relates to a hot-rolled steel strip production line and its use method, in particular to an energy-saving hot-rolled steel strip production line and its use method, in particular to a production line capable of rolling both austenitic steel and ferrite Both body steel and thin and thick strip steel can be produced, and a multi-mode short-flow hot-rolled strip steel production line implemented on the same production line and its use method. Background technique [0002] At present, the hot continuous rolling production lines widely used in the world mainly include conventional hot rolling production lines and thin slab continuous casting and rolling production lines. Due to the different layout of the production lines, the range of thickness of the products that can be produced by the two types of production lines is also different. [0003] Existing conventional hot rolling production lines cannot mass-produce thin-gauge hot-rolled produ...

AI Technical Summary

Problems solved by technology

However, the problem with this method is that once an accident or failure occurs in the rolling line, the entire line needs to be shut down, which will cause great losses

At present, there is no production line that can take into account both the single billet mode and the continuous rolling mode

[0005] In addition, the casting slabs of traditional hot rolling production lines are generally produced by cold charging, and the slabs need to be heated in a heating furnace for a long time before rolling, resulting in high energy consumption per ton of steel

The traditional thin slab technology, such as CSP technology, is produced by hot charging, but it still needs to be equipped with a heating furnace of about 300m to supplement the heat of the slab. Although the energy consumption per ton of steel is lower than that of traditional hot rolling, its actual ton Steel energy consumption is still high

The latest ESP technology realizes direct loading in a complete sense, but it needs to use a high-power electromagnetic induction heating device to supplement the heat of the billet before entering the finishing mill, and its energy consumption per ton of steel is still relatively high

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