Modle Am80 Am70 A12O3%≥ 80 70 MgO%≥ 8 12 Bulk density g/cm3≥ 100℃×24h≥ 2.9 2.9 1500℃ x 3h≥ 2.8 2.8 Compressive strength at room temperature Mpa≥ 100℃×24≥ 45 45 1500℃×3h≥ 60 60 Line change rate % 100℃×24≥ 0~-0.1 0~-0.1 1500℃×3h≥ 0~+0.1 0~+0.1 High temperature bending strength Mpa(1400℃×30min) 100℃×24≥ 76 1500℃×3h≥ 9 8

Modle MT-10A MT-10B MT-10C MT-14A MT-14B MT-14C MT-18A MT-18B MT-180 Mg%≥ 80 79 77 76 74 72 72 70 69 C%≥ 10 10 10 14 14 14 18 18 18 Apparent porosity %≥ 45 6 4 5 6 3 4 5 5 Bulk density 2.93 g/cm3 acuity 3.02 2.92 2.95 2.90 2.87 2.89 2.84 2.79 Compressive strength mpa 40 40 35 40 35 35 35 35 30 30 High temperature bending strength Mpa 6 5 4 12 12/10 7 4

Chemical composition (%) Al2O3 ≥90 Ca0 ≤0.5 Bulk density g/cm3≥ 3.0 Compressive strength (Mpa) (110℃×2h) 40 (1000℃×3h) 55 (1500℃×3h) 130 Line change rate (%) (1000℃×3h) 0~-0.1 (1500℃×3h) 0~-0.2 Refractoriness (℃) >1750

Modle LMT-76 LMT-74 LMT-72 Al2O3+Mgo 76 74 72 MgO%≥ 14 12 10 C%≥ 8 8 7 Apparent porosity %≥ 891 10 Bulk density g/cm3≥ 2.90 2.85 2.8 Compressive strength Mpa≥ 55 45 40 High temperature bending strength Mpa(1400℃×30min)≥ 665 0.2Mpa load softening starting temperature ℃≥ 1670 1630 1600

Modle A B C MgO%≥ 78 76 74 C%≥ 10 12 14 Apparent porosity %≥ 54 4 Bulk density g/cm3≥ 3.07 3.05 3.07 Temperature compressive strength Mpa≥ 42 42 40 High temperature bending strength Mpa(1400℃x30min)≥ 12 12 10

Chemical composition (%) Mgo ≥82 CaO 7-9(6-9) Fe2O3 5-7(5-9) FiO2 ≤1.5 Compressive strength (Mpa)(after burning)(1300℃×3h) ≤10 (1600℃×3h) ≤25 Line shrinkage (%)(after burning)(1300℃×3h) -0.5 (1600℃×3h) -0.3 Particle volume (2-5m/m)(g/cm2) ≥3.25 Particle range (mm) 0-5

Chemical composition (%) Mgo ≥85 Cr2O3 ≥8 CaO ≤5 Volume density g/cm3≥ (110℃×24h） ≤2.0 (1500℃×3h) ≤1.8 Flexural strength (Mpa) (110℃×24h） ≥1.8 (1500℃×3h) ≥2.05 Linear change rate (%) (110℃×24h） ≤-0.4 (1500℃×3h) ≤-0.4