Unit combination nozzle structure is simple, the spray shape as the fan-shaped spray, spray Angle is bigger, uniform distribution of fog, water gradually from center to edge.Unit modular fan nozzle are spray pipe welding on the manifold injection, can form the overlapping spray;The mould in the nozzle is mainly used in the bottom of foot roller, cooling steel billet short edge, at the same time also can be used for cleaning and cooling of the equipment.