Brief introduction of packaging steel strip roughing mill and its front and rear equipment

Brief introduction of packaging steel strip roughing mill and its front and rear equipment
　　The horizontal rolling mill structure of the roughing mill is usually two-high or four-high. In the rough rolling mill layout, the two-high roughing mill is arranged in the front part of the mill, and the four-high roughing mill is arranged in the rear part of the mill. In the production of hot-rolled strip steel, the horizontal rolling mill of the roughing mill is used to thin the hot slab into The intermediate strip suitable for the rolling of the finishing mill is broken, and the slab is rolled on the roughing mill for the first few passes. Because the temperature is higher, it is conducive to achieving large reduction, and the roll is required to have a larger bite angle; In several passes, it is necessary to transport the intermediate billet of uniform thickness to the finishing mill. Compared with the four-high roughing mill, the two-high roughing mill has a large diameter and a large bite angle. Large reduction of goods; the four-roll work roll has a small diameter, which is conducive to the control of the order of the strip, and because of the support roll, the deflection of the work roll is reduced, and the thinner and uniform middle of the order can be rolled. Billet.
　　The working mode of rough rolling mill is divided into two types: reversible and irreversible. The opening of the reversible roughing mill is large, the slab is reciprocated on the rolling mill, and the total thickness of the paper is large. The irreversible roughing mill rolls the slab one step at a time in one direction.
　　The equipment before and after the roughing mill mainly includes vertical rolls, descaling headers, guard plates, rack rolls, entrance and exit guides, etc. The composition of the equipment before and after the roughing mill.