Method for sealing gap between upper nozzle and lower nozzle of continuous casting tundish

The invention discloses a method for sealing a gap between an upper nozzle and a lower nozzle of a continuous casting tundish, and relates to the technical field of ferrous metallurgy, the method comprises the following specific steps: S1, material preparation: preparing a high-temperature sealant; s2, field operation: firstly, preparing an upper nozzle and a lower nozzle which are preset on the tundish; then, high-temperature sealant is smeared between the upper nozzle and the lower nozzle; secondly, a water outlet is installed; and finally, baking the area between the upper nozzle and the lower nozzle. According to the technical key points, the method can solve the problem of subsurface bubbles of continuous casting billets caused by argon sealing of gaps between an upper nozzle and a lower nozzle of a tundish for some special steel types; during use, the high-temperature sealant is used for replacing argon to seal the upper nozzle and the lower nozzle of the tundish, so that the sealing effect can be achie