Project indicators

LN-55A

LN-55B

LN-65A

LN-65B

LN-75A

LN-75B

LN-85A

LN-85B

AL2O3 ,%

≥55

≥55

≥65

≥65

≥75

≥75

≥85

≥85

Fire resistance, ℃

≥1770

≥1770

≥1790

≥1790

≥1790

≥1790

≥1790

≥1790

Bond flexural strength , MPa

110℃×24hAfter drying

≥1.0

≥2.0

≥1.0

≥2.0

≥1.0

≥2.0

≥2.0

≥2.0

1400℃×3hAfter burning

≥4.0

≥6.0

≥4.0

≥6.0

≥4.0

≥6.0

/

/

1500℃×3hAfter burning

≥6.0

≥6.0

0.2MPa load softening temperature

/

≥1300

/

≥1400

/

≥1400

/

≥1650

Compressive strength,%

1400℃×3hAfter burning

+1～-5

/

1500℃×3hAfter burning

/

+1～-5

Bond time,min

1～3

granularity ,%

-1.0mm

100

+0.5mm

≤2

-0.074mm

≥50