Continuous casting production line and method for reducing continuous casting covering slag loss

The invention relates to the technical field of steel smelting, and particularly discloses a continuous casting production line and a method for reducing continuous casting covering slag loss. The continuous casting production line comprises a crystallizer, a cover plate protective cover, a slag adding machine and a cofferdam. The cofferdam is arranged on the top face of the crystallizer cover plate and located in the through hole, the top end of the cofferdam protrudes out of the cover plate protective cover, the cofferdam is in an arc shape, at least two opposite sides of the outer wall of the cofferdam abut against the through hole, the cofferdam surrounds the crystallizer opening, and an arc-shaped opening of the cofferdam faces the side, provided with the slag adding pipe, of the crystallizer. By applying the continuous casting production line and the method for reducing the loss of the continuous casting covering slag, the covering slag blown to the outside of a crystallizer opening can be collected, th