Clay refractory product
 
Clay brick
Clay brick for blast furnace
Clay brick for casting
Clay lining brick for molten steel ladle
Clay brick for casting steel in molten steel ladle
 
 
 
 
 
Clay brick
Clay brick
Clay brick
Clay brick
 
Clay refractory product
    
    Clay refractory product is mainly used in coke oven, blast furnace, hot-air furnace, molten steel ladle, casting product, boiler, cement kiln, glass furnace, furnace lining and thermal equipment.
    
Clay brick
Performance index
Item

Index

N-1

N-2a

N-2b

N-3a

N-3b

N-4

N-5

N-6

Refractoriness，Cone number

176

174

174

172

172

170

166

158

Cold crushing strength kgf/cm2 No less than

300

250

200

200

150

200

150

150

Apparent porosity % No more than

22

24

26

24

26

24

26

28

2kgf/cm2 Refractoriness under load ℃ No less than

1400

1350

-

1320

-

1300

-

-

Reheating linear change %

1450 ℃，2h

+0.1
-0.4

+0.1
-0.5

+0.2
-0.5

-

-

-

-

-

1350 ℃，2h

-

-

-

+0.2
-0.5

+0.2
-0.5

+0.2
-0.5

+0.2
-0.5

-
 
Clay brick for blast furnace
Performance index

Item

Index

RN-42

RN-40

RN-36

Al2O3 % No less than

42

40

36

Refractoriness , Cone number

176

174

170

Cold crushing strength MPa No less than

29.4

24.5

19.6

Apparent porosity% No more than

24

24

26

0.20MPa Refractoriness under load ℃ No less than

1400

1350

1300

Reheating linear change %

1450 ℃，2h

0
-0.4

-

-

1350 ℃，2h

-

0
-0.3

0
-0.5
 
Clay brick for casting
Performance index
Item

Index

JZN-40

JZN-36

JZN-28

Al2O3 % No less than

40

36

28

Refractoriness，Cone number

172

170

166

Reheating linear change % 1350 ℃，2h

+0.1
-0.3

Apparent porosity%

17-25
 
Clay lining brick for molten steel ladle
Performance index

Item

Index

CN-42

CN-40

CN-36

Al2O3 % No less than

42

40

36

Refractoriness, Cone number

176

174

170

0.20MPa Refractoriness under load ℃ No less than

1430

1400

1370

Reheating linear change % 1350 ℃，2h

0
-0.3

0
-0.3

0
-0.3

Apparent porosity% No more than

18

19

19

Cold crushing strength MPa No less than

39.2

34.3

29.4
 
Clay brick for casting steel in molten steel ladle
Performance index
Item

Index

SN-40

KN-40

XN-40

ZN-36

Al2O3 % No less than

40

Refractoriness, Cone number

172

0.20MPa Refractoriness under load℃ No less than

1370

—

Reheating linear change % 1350 ℃，2h

-

0
-0.3

—

Apparent porosity % No more than

15-23

≤22

15-25

≤23

Cold crushing strength MPa No less than

-

19.6
 
 
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