PRODUCTS

Alumina Refractory Products

 High-Alumina Series for Electric Arc Furnace Roof

 
Properties

High-alumina brick EAF roof

Unburnt high-alumina brick for EAF roof

NLDL-80
NDL-80
NLBDL-80
NLBDL-75

Al2O3, Min. (%)

80
80
80
75

Refractoriness, Min. (°C)

1790
1790
1790
1790

0.2MPa refractoriness under load, Min. (°C)

1550
1550
1560(T2)
1530(T2)

Linear change after heating (1550°C×2h) (%)

0~-0.3
0~-0.3
--
--

Apparent porosity, Roof brick, Max. (%)

20
19
19
19

Apparent porosity, Skew brick, Max. (%)

21
21
19
19

Cold crushing strength, Min. (MPa)

78
78.5
60
60


 

High-Alumina Series, Bricks for Cement Kiln, Table 1

 
Properties

Palling-resistance high-alumina brick

Alkali-resistance brick

NLKBL-70
NLKBL-75
NLNJ-30
NLNJ-35
Al2O3, Min. (%)
70
75
27
35
Fe2O3, Max. (%)
--
--
2.0
1.5
0.2MPa refractoriness under load, Min. (°C)
1500
1520
1390
1460
Linear change after heating (1400°C×2h) (%)
--
--
-0.1~ +0.3
-0.1~ +0.3
Apparent porosity, Max. (%)
22
23
24
24
Cold crushing strength, Min. (MPa)
60
75
20
25
Bulk density, Min. (g/cm3)
--
1.95
1.96
--
Thermal shock resistance (1100°C -water) (times)
40
30
--
--
 
 
  
High-Alumina Series, Bricks for Cement Kiln, Table 2
 
Properties

Phosphate-bonded high-alumina and abrasive high-alumina bricks

Unburnt stainless - steel - fiber abrasive high-alumina brick

Brick of high refractoriness under load

NP
NPA
NPG
NTP-1
NTP-2
Al2O3, Min. (%)
75
77
75
70
70
Refractoriness, Min. (°C)
1770
1770
1770
1770
1770
0.2MPa refractoriness under load, Min. (°C)
1350
1300
1400
1500
1550
Linear change after heating (1500°C×2h) (%)
--
--
--
0~+1.0
0~+1.0
Apparent porosity, Max. (%)
20
20
19
19
20
Cold crushing strength, Min. (MPa)
58.8
63.7
60
65
65
Bulk density, Min. (g/cm3)
2.65
2.70
2.80
2.75
2.75
Thermal shock resistance (1100°C -water) (times)
20
25
25
30
30
 
 
 

High-Alumina Series for Blast Furnace, Hot Stove, Table 1

 
Properties

High-alumina brick for blast furnace

Al2O3-C brick for blast furnace

NGL-55
NGL-65
NGL-75

Unburnt Al2O3-C brick

Al2O3-C brick

Al2O3, Min. (%)
55
65
75
60
60
Fe2O3, Max. (%)
2.0
2.0
2.0
1.5
1.5
C, Min. (%)
--
--
--
12
12
Refractoriness, Min. (°C)
1770
1790
1790
1790
1790
0.2MPa refractoriness under load, Min. (°C)
1480
1500
1520
1650
1650
Linear change after heating (1500°Cx2h) (%)
0~-0.2
0~-0.2
0~-0.2
±0.2
±0.2
Apparent porosity, Max. (%)
19
19
19
10
18
Cold crushing strength, Min. (MPa)
49.0
58.8
70
40
60
 
 
 

High-Alumina Series for Blast Furnace, Hot Stove, Table 2

 
Properties

High-alumina brick for stove

Low-creep series high-alumina bricks

NRL-65
NRL-55
NLDRL-155
NLDRL-150
NLDRL-145
NLDRL-140
NLDRL-135
NLDRL-130
Al2O3, Min. (%)
65
55
75
75
65
65
65
60
Refractoriness, Min. (°C)
1790
1770
1790
1790
1800
1850
1850
1850
0.2MPa refractoriness under load, Min. (°C)
1500
1470
1550
1550
1500
1500
1500
1480
Linear change after heating (1550°C ×2h)
+0.1 -0.4
+0.1 -0.4
±0.2
±0.2
±0.2
±0.2
±0.2
±0.2
Apparent porosity, Max. (%)
24
24
20
21
19
23
23
23
Cold crushing strength, Min. (MPa)
49
44.1
60
60
60
50
45
45
Creep rate (0.2MPa×50h), Max. (%)
--
--

1550°C 0.4   0.6  0.8

1550°C 0.4  0.6  0.8

1450°C 0.4  0.6  0.8

1400°C 0.4  0.6  0.8

1350°C 0.4  0.6  0.8

1300°C 0.4  0.6  0.8

 
 
 

High-Alumina Series for Blast Furnace, Hot Stove, Table 3

 
Properties

Andalusite brick

Al2O3-Si-C brick

Compound brown corundum brick

NHZ-65
NHZ-60
NHZ-55
NHZ-50
Andalu-site
Bauxite
Corun-dum
Al2O3, Min. (%)
65
60
55
50
50
70
65
75
Fe2O3, Max. (%)
10
10
1.2
1.2
--
--
--
--
SiC (%)
--
--
--
--
8
8
5
10
C, Min. (%)
--
--
--
--
10
10
15
--
0.2MPa refractoriness under load, Min. (°C)
1650
1600
1600
1580
--
--
--
1700
Linear change after heating (1500°C ×2h)
0+0.3
0+0.3
+0.2
+0.2
0+1.0
-0.1 +0.4
0+1.2
±0.2
Linear change after heating (1600°C ×2h)
--
--
+0.3
--
--
--
--
--
Apparent porosity, Max. (%)
19
19
19
19
17.0
16.5
15.5
18
Cold crushing strength, Min. (MPa)
50
50
50
50
40
50
55
100
Bulk density, Min. (g/cm3)
2.60
2.50
2.50
2.40
2.65
2.75
2.90
3.0
 
 
 

High-Alumina Series for Blast Furnace, Hot Stove, Table 4

 
Properties

Mullite brick

High-purity mullite brick

Sillimanite-mullite

Corundum-mullite brick

Al2O3,Min. (%)
70
75
60
75
80
Fe2O3, Max. (%)
0.8
0.8
--
1.5
0.8
Refractoriness, Min. (°C)
1790
1790
1790
--
1790
0.2MPa refractoriness under load, Min. (°C)
1650
1680
1650
--
1700
Linear change after heating (%)

0~+0.4 (1500°C ×2h)

--
--
--
0~+0.5
(1500°C ×3h)
Apparent porosity, Max. (%)
18
20
19
22
18
Bulk density, Min. (g/cm3)
2.5
2.6
2.4
2.82
3.0
Cold flexural strength, Min. (MPa)
--
--
--
8
25
Al2O3, Min. (%)
70
75
60
75
80
 
 
 

High-Alumina Bricks for Ladle

 
Properties

High-alumina brick for ladle

Ultra-low expansion high-alumina brick

CL-75
LCL-80
LCL-85
LPL-78
LPL-85
Al2O3, Min. (%)
75
80
85
78
85
Fe2O3, Max. (%)
--
--
--
2.0
2.0
Refractoriness, Min. (°C)
--
--
--
1790
1800
0.2MPa refractoriness under load, Min. (°C)
1510
1530
1560
1550
1600
Linear change after heating (1500°C×2h) (%)
+0.1-0.5
--
--
0+0.6
0+1.0
Linear change after heating (1550°C×2h) (%)
 
--
+0-0.4
+0-0.4
--
--
Apparent porosity, Max. (%)
28
21
20
19
20
Cold crushing strength, Min. (MPa)
39.2
65
65
70
80
Bulk density, Min. (g/cm3)
2.65
2.8
2.85
2.75
2.90
 
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