Item

Indexes

LZ-75

LZ-65

LZ-55

LZ-48

Al2O3 %

≥75

≥65

≥55

≥48

Refractoriness(°C)

≥1790

≥1790

≥1770

≥1750

Refractoriness under Load

≥1520

≥1500

≥1470

≥1420

Permanent Linear Change

1500°C,2h

+0.1                           -0.4

-

1450°C,2h

-

+0.1                             -0.4

Apparent Porosity %

≤22

≤23

≤22

≤22

Cold Crushing Strength

≥58

≥50

≥46

≥42