Large square blank continuous casting crystallizer slag-blocking rack

The utility model relates to a bloom continuous casting crystallizer slag stopper which comprises baffle plates and a rib plate, wherein the rib plate causes the two L-shaped baffle plates formed by bending thin steel plates into 90-120 degrees to be connected together by the way that the vertical plates are arranged oppositely and the transverse plates are arranged reversely. The two baffle plates inserted into a gap between a dummy bar dovetail groove and a crystallizer respectively separate nail scraps from steel slag so as to cause the nail scraps not to be mixed and collected with the steel slag even through in the washing of molten steel, thereby the cooling effect of the molten steel at the root of the dovetail groove is ensured, the dovetail groove is smoothly formed an enough bloom shell, the problem of the initiative leaker is avoided, the stop production accident and the loss of the equipment are reduced, and the production cost is lowered. Moreover, the utility model has simple structure, is easy