refractory nozzle

This kind of AL-C pre-heating long nozzle has good properties of impact resistance and good corrosin resistance to molten steel, and which can effectively prevent air oxidation and splashing to molten steel . Physical and chemical index CLT-A CLT-B Main body Slag line Main body Slag line Al2O3 % ≥46 / ≥36 / ZrO2 % / / / ≥72 MgO % / ≥75 / / C+SiC % ≥25 ≥15 ≥30 ≥17 A.P. % ≤20 ≤19 ≤20 ≤18 B.D. g/cm3 ≥2.46 ≥2.65 ≥2.25 ≥3.10 C.C.S. Mpa ≥20 ≥18 ≥20 ≥17 MOR Mpa ≥6.0 ≥6.0 ≥6.0 ≥6.0 Thermal shock ≥5 ≥5 ≥5 ≥5