A control method for reducing the temperature difference between the head and the tail of the continuous casting slab in the direct rolling process

Abstract

The invention discloses a control method for reducing temperature difference between head and tail before continuous casting billet rolling in direct rolling process and belongs to the technical fieldof direct rolling. The control method for reducing temperature difference between head and tail before continuous casting billet rolling in direct rolling process includes the steps that two heat reservation covers are additionally arranged on a conveying roller of each path of a continuous casting machine, wherein one of the heat reservation covers is additionally arranged between the casting blanking cutting position and the sizing position, the length of the heat reservation cover is half of the sizing length of a casting blank, and the start point of the heat reservation cover is 0.25 m to the monitoring point of the sizing head; and the other heat reservation cover is additionally arranged on the conveying roller before the casting blank moves to the steel transfer zone, the length of the heat revervation cover is half of the sizing length of the casting blank, and the start point of the heat revervation cover is at the front edge of the steel transfer zone. Before each path of the casting blank moves to the steel transfer zone for combination, the casting blank needs to hold heat on the continuous casting conveying roller for 0.5-1.5 minutes, and the time of heat holding canbe technically adjusted according to pulling speed of the continuous casting machine. The advantages of the control method for reducing temperature difference between head and tail before continuouscasting billet rolling in direct rolling process are that an effect of reducing casting bank temperature difference between the head and the tail is achieved, and less investment and quick results areachived. The control method for reducing temperature difference between head and tail before continuous casting billet rolling in direct rolling process meets strength requirement and is light in weight and convenient for on-site workers to remove for examination, repair and maintenance at any time.

Description

technical field [0001] The invention belongs to the technical field of direct rolling and provides a control method for reducing the temperature difference between the head and the tail of the continuous casting slab before rolling in the direct rolling process. Background technique [0002] The direct rolling technology of continuous casting slab refers to the technology that the continuous casting slab is cut by the continuous casting machine without being heated by the heating furnace, and then sent directly to the rolling mill for rolling. This technology not only reduces production costs and energy consumption, but also reduces greenhouse gas emissions. Although the direct rolling technology has many advantages, since the continuous casting machine has not been subjected to the uniform temperature treatment of the heating furnace after cutting, the temperature difference between the head and the tail of the continuous casting slab before rolling is relatively large. Th...

AI Technical Summary

Problems solved by technology

At present, there is no effective method to significantly reduce the temperature difference between the head and the tail of the direct rolling continuous casting slab before rolling

Images