Convex cambered narrow-faced copper plate of continuous casting crystallizer and method for using same

A convex cambered narrow-faced copper plate of a continuous casting crystallizer, comprising a working face, wherein the working face comprises:

• a first working face and a second working face;
• wherein two second working faces are provided, one of which is arranged at one side of the first working face and the other of which is arranged at the other side of the first working face, and the two second working faces are arranged oppositely;
• the first working face is connected to each of the two second working faces, with a first connecting line being provided at a joint of the first working face and the second working face, and two first connecting lines being provided;
• and
• a cross section of the first working face is a convex arc, and the first working face extends from an upper opening of the narrow-faced copper plate to a lower opening of the narrow-faced copper plate, and a height of the first working face protruding relative to a plane where the two first connecting lines are located gradually decreases from the upper opening of the narrow-faced copper plate to the lower opening of the narrow-faced copper plate.