Slag dam for tundish and preparation method of slag dam

The invention belongs to the technical field of refractory materials, and discloses a slag dam for a tundish and a preparation method thereof.The slag dam for the tundish comprises, by weight, 30%-38% of raw forsterite with the particle size being 15-8 mm, 5%-15% of regenerated magnesium aluminate spinel with the particle size being 5-3 mm, 10%-25% of regenerated magnesium aluminate spinel with the particle size being 3-1 mm, 10%-20% of fused magnesite with the particle size being 1-0 mm and 10%-20% of fused magnesite with the particle size being 180 meshes. 2-8% of light calcined magnesia powder with a particle size of 1000 meshes, 1-5% of silicon carbide with a particle size of less than 240 meshes, and 2-6% of silica fume with a particle size of less than The dispersing agent accounts for 0.1%-0.15% of the total weight of the raw materials, the retarder accounts for 0.01%-0.02% of the total weight of the raw materials, and the explosion-proof fiber accounts for 0.06%-0.08% of the total weight of the raw Th