ITEM

NL13

SK-30N3

SK32

SK-34N1

NZ42

Refractoriness(SK)

≥32

≥1710

≥31

≥1690

≥32

≥1710

≥34

≥1750

≥34

≥1750

Bulk Density

g/cm³

≥2.3

≥1.9

≥1.9

≥2.0

≥2.26

Apparent porosity

%

≤13

≤26

≤26

≤24

≤20

Cold Crushing Strength

MPa

≥49

≥19.6

≥19.6

≥19.6

≥40

Lingar Expasion

%  at1000

Rate of lingar Change

%   at *2hrs

-0.5~+0.5

1350

-0.5~+0.5

1350

-0.5~+0.5

1400

≤0.2

1350

Soften Yield Point Under Load

(T2)  at 0.2MPa

≥1450

≥1350

≥1350

≥1400

Chemical

Analysis

%

SiO₂

Al₂O₃

≥38

≥39

≥40

≥42

Fe₂O₃

≤2

≤1.7

ITEM

SK35(H3)

SK36

SK37(H2)

SK38(H1)

LZ80

Refractoriness(SK)

≥35

≥1770

≥36

≥1790

≥37

≥1825

≥38

≥1850

≥37

≥1790

Bulk Density

g/cm³

≥2.1

≥2.2

≥2.2

≥2.3

≥2.8

Apparent porosity

%

≤27

≤27

≤27

≤27

≤22

Cold Crushing Strength

MPa

≥24.5

≥29.4

≥29.4

≥29.4

≥50

Lingar Expasion

%  at1000

Rate of lingar Change

%   at *2hrs

-0.6~+0.2

1500

--0.6~+0.2

1500

-0.6~+0.2

1500

--0.6~+0.3

1500

≤0.7

1400

Soften Yield Point Under Load

(T2)  at 0.2MPa

Chemical

Analysis

%

SiO₂

Al₂O₃

≥50

≥52

≥60

≥70

≥80

Fe₂O₃