Long nozzle for ultra-low carbon steel

The utility model relates to the technical field of molten steel smelting, in particular to a long nozzle for ultra-low carbon steel, which comprises a reinforcing layer body, a runner for molten steel to pass through penetrates through the center of the reinforcing layer body, and a bowl-shaped opening is arranged at one end of the reinforcing layer body in the length direction of the runner. The inner wall, located at the runner position, of the reinforcing layer body is provided with a heat preservation anti-oxidation layer, and the outer wall of the reinforcing layer body is covered with a slag corrosion resisting layer. According to the long nozzle for the ultra-low carbon steel, the long nozzle refractory material of a three-layer structure is utilized, when low carbon steel and ultra-low carbon steel are used for continuous casting, molten steel is not recarburized, the thermal shock resistance of the nozzle is improved, oxygen in steel can be prevented from reacting with carbon in the refractory mater