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
|
|
