Product Features: Tundish vibrators material using the new low-carbon green binder, the raw material optimization, preferred sintering agent, etc. produced. Just after the construction of the following low-temperature baking 200 ℃, life of up to 40 hours, turning bag after use is easy, especially for a long time pouring pouring steel or with a quick outlet tundish working lining. Intermediate indicators of physical and chemical indicators lump type material magnesium magnesia chrome chemical composition (%) MgO + C ≥75 ≥82 Gr2O3 ≥3 / compressive strength (Mpa) 250 ℃ × 24h ≥4 ≥5 1500 ℃ × 3h ≥13 ≥12 flexural strength (110 ℃ × 24h) ≥2 ≥3 bulk density (g / cm3) ≥2.10 ≥2.20 line rate of change (%) (1500 ℃ × 3h) 0 ~ -0.2 0 ~ -1