Plugging device for upper nozzle of continuous casting tundish

The density of the continuous casting tundish upper nozzle plugging device is larger than that of molten steel, the continuous casting tundish upper nozzle plugging device comprises an aluminum circular ring, a containing cavity and an oxygen storage bin are arranged on the aluminum circular ring, and a pressing block with the density larger than that of the molten steel is arranged in the containing cavity. Aluminum can sink into molten steel to generate chemical reaction automatically, the aluminum can be accurately positioned around an upper nozzle of a continuous casting tundish, the safety risk of manually holding an aluminum strip for operation is eliminated, meanwhile, the effect is better, and meanwhile, the pressing block can be repeatedly used. 本发明的实施例提供了一种连铸中间包上水口封堵装置，密度大于钢水，且包括铝制圆环，所述铝制圆环上设置有容置腔和氧气存储仓，所述容置腔内设置有密度大于钢水的压块。可使铝沉入钢水中自行发生化学反应，准确定位在连铸中间包上水口周围，消除了人工手持铝条作业的安全风险，同时效果更佳，同时压块可重复使用。