Dry material working layer tundish capable of preventing steel seepage at water gap part

The utility model discloses a dry material working layer tundish capable of preventing steel seepage at a nozzle part, which is characterized in that an upper nozzle of the tundish is firstly fixed and filled with a first dry material layer, a gap is formed between the upper plane of the first dry material layer and the bottom of a nozzle seating brick, the nozzle seating brick is sleeved on the peripheral side of the upper nozzle and is provided with an annular gap, and the annular gap is filled with chromium fire clay; the upper nozzle extends out of the top of the nozzle seating brick, the top of the annular gap covers a second dry material layer, the second dry material layer extends to cover the nozzle seating brick and the peripheral side of the upper nozzle, the top of the second dry material layer is covered with a magnesium coating material, the peripheral side of the upper nozzle is coated with chromium fire clay, and the chromium fire clay is extruded and filled in the annular gap. The first dry ty