Corrosion-resistant tundish collector nozzle

The utility model discloses a corrosion-resistant tundish down nozzle, which comprises a brick cup, an upper nozzle body, a lower nozzle body, a first corrosion-resistant layer and a coarse filter plate, an upper sliding plate is arranged below the brick cup, and the first corrosion-resistant layer is arranged on the inner wall of the upper nozzle body and the inner wall of the lower nozzle body. A first corrosion-resistant layer is arranged in the upper sliding plate, a second corrosion-resistant layer is arranged in the first corrosion-resistant layer, mounting grooves are formed in the upper sliding plate and the lower sliding plate, a coarse filter plate is arranged in the mounting groove of the upper sliding plate, a fine filter plate is arranged in the mounting groove of the lower sliding plate, and limiting blocks are arranged in the mounting grooves. According to the utility model, through the arrangement of the first corrosion-resistant layer and the second corrosion-resistant layer, the first corros